/* ==========================================================================
   StudyDump - Note Reading Experience Styles
   Matching Modern Educational Portal (Outfit + Plus Jakarta Sans + Midnight Navy)
   ========================================================================== */

/* Breadcrumbs Bar */
.breadcrumbs-bar {
  padding: var(--space-2) 0 var(--space-5);
  margin-bottom: var(--space-6);
}

.breadcrumbs-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  font-weight: 500;
}

.breadcrumb-item a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
  color: var(--accent);
}

.breadcrumb-separator {
  color: var(--border-strong);
  font-size: 0.85em;
}

.breadcrumb-current {
  color: var(--text-primary);
  font-weight: 600;
  max-width: min(38ch, 100%);
  white-space: normal;
  overflow: hidden;
  text-overflow: ellipsis;
  overflow-wrap: break-word;
  word-break: break-word;
}

/* Container overrides for wide reading mode */
.note-page-container {
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-4) var(--space-8) var(--space-20);
}

@media (max-width: 1023px) {
  .note-page-container {
    padding: var(--space-4) max(var(--space-6), var(--safe-right)) var(--space-16) max(var(--space-6), var(--safe-left));
  }
}

@media (max-width: 640px) {
  .note-page-container {
    padding: var(--space-3) max(var(--space-4), var(--safe-right)) var(--space-12) max(var(--space-4), var(--safe-left));
  }
}

@media (max-width: 380px) {
  .note-page-container {
    padding: var(--space-2) max(var(--space-3), var(--safe-right)) var(--space-10) max(var(--space-3), var(--safe-left));
  }
}

.note-header-inner {
  max-width: 1240px;
  width: 100%;
}

/* Two-column Reading Layout */
.reading-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
  align-items: start;
  min-width: 0;
  max-width: 100%;
}

#note-article-container {
  min-width: 0;
  max-width: 100%;
  width: 100%;
  overflow: hidden;
}

.note-content {
  min-width: 0;
  max-width: 100%;
  overflow-wrap: break-word;
  word-break: break-word;
}

/* On tablets and mobile, keep comfortable reading measure */
@media (max-width: 1023px) {
  #note-article-container {
    max-width: 760px;
    width: 100%;
    margin: 0 auto;
  }
}

@media (min-width: 1024px) {
  .reading-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: clamp(1.5rem, 3vw, 3.5rem);
    justify-content: space-between;
  }
}

/* Note Header */
.note-header {
  margin-bottom: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 100%;
}

/* Midnight Navy Banner */
.note-section-banner {
  background-color: var(--navy-banner-bg);
  border: 1px solid var(--navy-banner-border);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  max-width: 100%;
  box-shadow: var(--shadow-card);
}

.note-section-banner-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--navy-banner-text);
  letter-spacing: -0.01em;
  overflow-wrap: break-word;
  word-break: break-word;
  max-width: 100%;
}

.note-section-banner-badge {
  font-family: var(--font-mono);
  font-size: var(--text-3xs);
  font-weight: 600;
  color: var(--navy-pill-text);
  background-color: var(--navy-pill-bg);
  border: 1px solid var(--navy-pill-border);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.note-title {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 5vw, 2.75rem);
  font-weight: 800;
  line-height: var(--leading-tight);
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin: var(--space-2) 0 var(--space-1);
  overflow-wrap: break-word;
  word-break: break-word;
}

.note-meta-bottom {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-default);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  max-width: 100%;
}

@media (max-width: 640px) {
  .note-title {
    font-size: clamp(1.4rem, 5.5vw, 2.1rem);
    line-height: 1.25;
    overflow-wrap: break-word;
    word-break: break-word;
  }

  .note-section-banner {
    padding: 10px 12px;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .note-section-banner-title {
    font-size: 0.95rem;
    overflow-wrap: break-word;
    word-break: break-word;
  }

  .note-meta-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .note-meta-bottom>div:last-child,
  .note-actions-group {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    width: 100%;
  }

  .print-btn {
    padding: 6px 10px;
    font-size: 11px;
    min-height: 34px;
    gap: 5px;
  }
}

.note-meta-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 500;
}

.note-meta-info span+span::before {
  content: "·";
  margin-right: var(--space-3);
  color: var(--border-strong);
}

.print-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 14px;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.print-btn:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
  background-color: var(--bg-surface-subtle);
}

.print-btn svg {
  width: 14px;
  height: 14px;
}

/* Redundant Markdown H1 suppression */
.note-content>h1:first-child,
.note-content h1 {
  display: none !important;
}

/* Academic Metadata Info Card */
.academic-meta-card {
  margin-bottom: var(--space-8);
  padding: 18px 24px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--text-secondary);
}

.academic-meta-card strong {
  color: var(--text-primary);
  font-weight: 600;
}

.academic-meta-card code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 2px 7px;
  background-color: var(--bg-surface-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xs);
  color: var(--accent);
}

/* In-Article Contents Navigation Grid */
.contents-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 var(--space-10);
}

@media (max-width: 480px) {
  .contents-nav-grid {
    grid-template-columns: 1fr;
  }
}

.contents-nav-grid li {
  margin: 0;
  line-height: 1.3;
}

.contents-nav-grid a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-card);
}

.contents-nav-grid a:hover {
  border-color: var(--accent);
  background-color: var(--bg-surface-subtle);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

.cng-num {
  font-family: var(--font-mono);
  font-size: var(--text-3xs);
  font-weight: 700;
  color: var(--accent);
  background-color: var(--accent-subtle);
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  margin-right: 12px;
  flex-shrink: 0;
}

.cng-text {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cng-arrow {
  color: var(--text-tertiary);
  font-size: 1.1em;
  margin-left: 10px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.contents-nav-grid a:hover .cng-arrow {
  color: var(--accent);
}

/* ==========================================================================
   Table of Contents (Desktop Sticky + Mobile Drawer)
   ========================================================================== */

.toc-sidebar {
  display: none;
}

@media (min-width: 1024px) {
  .toc-sidebar {
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 86px;
    max-height: calc(100vh - 110px);
    width: 280px;
    flex-shrink: 0;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transform: translateZ(0);
  }
}

.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px 12px;
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  flex-shrink: 0;
}

.toc-title {
  font-family: var(--font-display);
  font-size: var(--text-2xs);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-weight: 700;
  color: var(--text-tertiary);
  margin: 0;
}

.toc-count {
  font-family: var(--font-mono);
  font-size: var(--text-3xs);
  font-weight: 500;
  color: var(--text-tertiary);
  background-color: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  padding: 2px 7px;
  border-radius: var(--radius-xs);
}

.toc-scroll-area {
  flex: 1;
  overflow-y: auto;
  padding: 10px 12px 18px;
  scrollbar-width: thin;
  scrollbar-color: var(--border-default) transparent;
}

/* Custom Scrollbar */
.toc-scroll-area::-webkit-scrollbar {
  width: 4px;
}

.toc-scroll-area::-webkit-scrollbar-track {
  background: transparent;
}

.toc-scroll-area::-webkit-scrollbar-thumb {
  background-color: var(--border-default);
  border-radius: var(--radius-pill);
}

.toc-scroll-area::-webkit-scrollbar-thumb:hover {
  background-color: var(--border-strong);
}

[data-theme="dark"] .toc-sidebar {
  background-color: #0d131f;
  border-color: #1e293b;
}

[data-theme="dark"] .toc-header {
  background-color: #0d131f;
  border-bottom-color: #1e293b;
}

[data-theme="dark"] .toc-count {
  background-color: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.08);
  color: var(--text-tertiary);
}

[data-theme="dark"] .toc-scroll-area {
  scrollbar-color: #26334d transparent;
}

[data-theme="dark"] .toc-scroll-area::-webkit-scrollbar-thumb {
  background-color: #26334d;
}

[data-theme="dark"] .toc-scroll-area::-webkit-scrollbar-thumb:hover {
  background-color: #38bdf8;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-item a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: var(--text-xs);
  line-height: 1.4;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 6px 10px;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.toc-item a:hover {
  color: var(--text-primary);
  background-color: var(--bg-surface-subtle);
}

.toc-item.depth-1 a,
.toc-item.depth-2 a {
  font-weight: 600;
  color: var(--text-primary);
}

.toc-item.depth-3 {
  margin-left: 12px;
  border-left: 1.5px solid var(--border-subtle);
  padding-left: 6px;
}

.toc-item.depth-3 a {
  font-size: var(--text-2xs);
  font-weight: 400;
  color: var(--text-tertiary);
  padding: 3px 8px;
}

.toc-item.depth-3 a:hover {
  color: var(--text-primary);
}

.toc-item.active a {
  color: var(--text-primary);
  background-color: var(--bg-surface-hover);
  font-weight: 600;
}

[data-theme="dark"] .toc-item.active a {
  background-color: rgba(255, 255, 255, 0.07);
  color: #f8fafc;
  font-weight: 600;
}

.toc-item.depth-3.active {
  border-left-color: var(--text-secondary);
}

[data-theme="dark"] .toc-item.depth-3.active {
  border-left-color: #94a3b8;
}

/* Mobile Collapsible TOC Drawer */
.mobile-toc {
  margin-bottom: var(--space-6);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  box-shadow: var(--shadow-card);
}

@media (min-width: 1024px) {
  .mobile-toc {
    display: none;
  }
}

.mobile-toc summary {
  padding: 12px 16px;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
  touch-action: manipulation;
  list-style: none;
}

.mobile-toc summary::-webkit-details-marker {
  display: none;
}

.mobile-toc summary svg {
  transition: transform var(--transition-fast);
}

.mobile-toc[open] summary svg {
  transform: rotate(180deg);
}

.mobile-toc .toc-list {
  padding: 8px 12px 14px;
  border-top: 1px solid var(--border-subtle);
  max-height: 52vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* ==========================================================================
   Long-Form Note Prose Typography
   ========================================================================== */

.note-content {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-primary);
  max-width: 100%;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

.note-content p,
.note-content li,
.note-content blockquote,
.note-content aside,
.note-content h1,
.note-content h2,
.note-content h3,
.note-content h4 {
  overflow-wrap: break-word;
  word-wrap: break-word;
}

.note-content>*+* {
  margin-top: var(--space-5);
}

/* Headings */
.note-content h2,
.note-content h3,
.note-content h4 {
  font-family: var(--font-display);
  color: var(--text-primary);
  line-height: var(--leading-tight);
  position: relative;
  scroll-margin-top: 90px;
}

.note-content h2 {
  font-size: clamp(1.6rem, 3.2vw, 2rem);
  font-weight: 700;
  margin-top: var(--space-10);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-default);
  letter-spacing: -0.02em;
}

.note-content h3 {
  font-size: clamp(1.2rem, 2.4vw, 1.45rem);
  font-weight: 700;
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
  letter-spacing: -0.015em;
}

.note-content h4 {
  font-size: var(--text-base);
  font-weight: 700;
  margin-top: var(--space-5);
  margin-bottom: var(--space-1);
}

.heading-anchor {
  position: absolute;
  left: -1.2em;
  opacity: 0;
  color: var(--accent);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85em;
  transition: opacity var(--transition-fast);
}

.note-content h2:hover .heading-anchor,
.note-content h3:hover .heading-anchor,
.note-content h4:hover .heading-anchor {
  opacity: 0.8;
}

.heading-copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-left: 8px;
  padding: 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-xs);
  color: var(--text-tertiary);
  opacity: 0;
  cursor: pointer;
  transition: all var(--transition-fast);
  vertical-align: middle;
  transform: translateY(-1px);
}

.note-content h2:hover .heading-copy-btn,
.note-content h3:hover .heading-copy-btn,
.note-content h4:hover .heading-copy-btn,
.heading-copy-btn:focus-visible {
  opacity: 0.7;
}

.heading-copy-btn:hover {
  opacity: 1 !important;
  color: var(--accent);
  background-color: var(--bg-hover);
  border-color: var(--border-subtle);
}

.heading-copy-btn.copied {
  opacity: 1 !important;
  color: #10b981;
  background-color: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.3);
}

@media (hover: none) {
  .heading-copy-btn {
    opacity: 0.6;
  }
}

/* Body Elements */
.note-content p {
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.note-content strong {
  font-weight: 700;
  color: var(--text-primary);
}

.note-content em {
  font-style: italic;
}

.note-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 500;
}

.note-content a:hover {
  color: var(--accent-hover);
}

.note-content hr {
  border: none;
  border-top: 1px solid var(--border-default);
  margin: var(--space-8) 0;
}

/* Lists */
.note-content ul,
.note-content ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-5);
}

.note-content li {
  margin-bottom: var(--space-2);
  line-height: var(--leading-normal);
}

.note-content li::marker {
  color: var(--accent);
}

.note-content ol li::marker {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-tertiary);
}

.note-content blockquote {
  border-left: 4px solid var(--navy-banner-bg);
  padding: var(--space-3) var(--space-5);
  margin: var(--space-6) 0;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-left-width: 4px;
  border-left-color: var(--navy-banner-bg);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
}

/* Inline Code */
.note-content :not(pre)>code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.15em 0.45em;
  background-color: var(--bg-surface-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xs);
  color: var(--text-primary);
  font-weight: 500;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-word;
}

[data-theme="dark"] .note-content :not(pre)>code {
  color: #cbd5e1;
  background-color: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.09);
}

/* ==========================================================================
   Academic Callouts (EXACT MATCH FOR SCREENSHOT)
   ========================================================================== */

.academic-callout {
  margin: var(--space-6) 0;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-left: 4.5px solid var(--callout-matters-border);
  border-radius: var(--radius-md);
  padding: 16px 22px;
  max-width: 100%;
  box-shadow: var(--shadow-card);
}

.callout-body {
  font-family: var(--font-sans);
  font-size: 0.96875rem;
  line-height: 1.68;
  color: var(--text-primary);
  overflow-wrap: break-word;
  word-break: break-word;
}

.callout-body strong.callout-lead {
  font-weight: 700;
  color: var(--text-primary);
  margin-right: 4px;
}

.callout-body>*:last-child {
  margin-bottom: 0;
}

/* Callout Variants */
.callout-important {
  border-left-color: #c5162e;
}

.callout-definition {
  border-left-color: #051d38;
}

[data-theme="dark"] .callout-definition {
  border-left-color: #38bdf8;
}

.callout-example {
  border-left-color: #059669;
}

.callout-note {
  border-left-color: #475569;
}

.callout-remember {
  border-left-color: #d97706;
}

.callout-warning {
  border-left-color: #dc2626;
}

/* ==========================================================================
   Academic Tables
   ========================================================================== */

.table-wrapper {
  margin: var(--space-6) 0;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  background-color: var(--bg-surface);
  position: relative;
}

.table-wrapper::-webkit-scrollbar {
  height: 6px;
}

.table-wrapper::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: var(--radius-pill);
}

.note-content table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: var(--text-sm);
}

.table-wrapper table {
  max-width: none;
  min-width: 480px;
  /* Prevents narrow phone squishing while scrolling safely in wrapper */
}

.note-content th {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.02em;
  background-color: var(--bg-surface-subtle);
  color: var(--text-primary);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-default);
  white-space: nowrap;
}

.note-content td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
  line-height: var(--leading-snug);
}

.note-content tr:last-child td {
  border-bottom: none;
}

.note-content tr:hover td {
  background-color: var(--bg-app);
}

@media (max-width: 640px) {

  .note-content th,
  .note-content td {
    padding: 10px 12px;
    font-size: var(--text-xs);
  }
}

/* ==========================================================================
   Code Blocks
   ========================================================================== */

.note-content pre {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.code-block-wrapper {
  position: relative;
  margin: var(--space-6) 0;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background-color: var(--bg-code);
  overflow: hidden;
  max-width: 100%;
  box-shadow: var(--shadow-card);
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background-color: #0b1120;
  border-bottom: 1px solid #1e293b;
  font-family: var(--font-mono);
  font-size: var(--text-3xs);
  color: #94a3b8;
  letter-spacing: 0.05em;
  min-height: 38px;
}

.code-lang {
  text-transform: uppercase;
  font-weight: 700;
  color: #e2e8f0;
}

.copy-code-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  min-height: 28px;
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: var(--text-3xs);
  color: #e2e8f0;
  font-weight: 600;
  touch-action: manipulation;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-code-btn:hover {
  background-color: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.3);
}

.code-block-wrapper pre {
  margin: 0;
  padding: 14px 16px;
  overflow-x: auto;
  max-width: 100%;
  -webkit-overflow-scrolling: touch;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.65;
  color: #e2e8f0;
}

.code-block-wrapper pre code {
  font-family: inherit;
  font-size: inherit;
  background: transparent;
  padding: 0;
  border: none;
}

.code-block-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.run-preview-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  min-height: 28px;
  background-color: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: var(--text-3xs);
  color: #38bdf8;
  font-weight: 600;
  touch-action: manipulation;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.run-preview-btn:hover {
  background-color: rgba(56, 189, 248, 0.22);
  border-color: #38bdf8;
}

.run-preview-btn.active {
  background-color: #38bdf8;
  color: #0b1120;
  border-color: #38bdf8;
}

.live-preview-container {
  border-top: 1px solid var(--border-default);
  background-color: #ffffff;
  overflow: hidden;
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background-color: #0b1120;
  border-bottom: 1px solid #1e293b;
  font-family: var(--font-mono);
  font-size: var(--text-3xs);
  color: #94a3b8;
}

[data-theme="light"] .preview-header {
  background-color: var(--bg-surface-subtle);
  border-bottom-color: var(--border-subtle);
  color: var(--text-secondary);
}

.preview-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.preview-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: #e2e8f0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

[data-theme="light"] .preview-badge {
  color: var(--text-primary);
}

.preview-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
  display: inline-block;
}

.preview-badge-sub {
  font-size: 0.65rem;
  color: #64748b;
  padding: 1px 6px;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
}

[data-theme="light"] .preview-badge-sub {
  color: var(--text-tertiary);
  background-color: var(--accent-subtle);
  border: 1px solid var(--accent-border);
}

.preview-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.preview-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: var(--text-3xs);
  color: #cbd5e1;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.preview-action-btn:hover {
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.3);
  background-color: rgba(255, 255, 255, 0.15);
}

[data-theme="light"] .preview-action-btn {
  background: var(--bg-surface);
  border-color: var(--border-default);
  color: var(--text-secondary);
}

[data-theme="light"] .preview-action-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background-color: var(--bg-surface-subtle);
}

.preview-body {
  position: relative;
  width: 100%;
  background-color: #ffffff;
  overflow: hidden;
}

.live-preview-frame {
  width: 100%;
  min-height: 120px;
  border: none;
  display: block;
  background-color: #ffffff;
  transition: height 160ms ease-out;
}

/* ==========================================================================
   Images & Figures
   ========================================================================== */

.note-content figure {
  margin: var(--space-8) 0;
  text-align: center;
}

.note-content figure img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  cursor: zoom-in;
}

.note-content figcaption {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-2);
}

/* ==========================================================================
   Previous / Next Navigation Footer
   ========================================================================== */

.note-nav-footer {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-default);
}

.note-nav-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .note-nav-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.nav-card {
  display: flex;
  flex-direction: column;
  padding: 16px 20px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  box-shadow: var(--shadow-card);
  min-width: 0;
  transition: all var(--transition-fast);
}

.nav-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}

.nav-card.next-card {
  text-align: right;
  align-items: flex-end;
}

.nav-card-label {
  font-family: var(--font-mono);
  font-size: var(--text-3xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.nav-card-key-hint {
  display: inline-block;
  padding: 1px 5px;
  font-size: 0.65rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent);
  background-color: var(--bg-hover, rgba(255, 255, 255, 0.08));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  margin-left: 6px;
  vertical-align: middle;
}

.nav-card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: var(--leading-snug);
  overflow-wrap: break-word;
  word-break: break-word;
}

.nav-card:hover .nav-card-title {
  color: var(--accent);
}

.back-to-dir-row {
  margin-top: var(--space-6);
  text-align: center;
}

.back-to-dir-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
  padding: 8px 16px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-pill);
  background-color: var(--bg-surface);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-fast);
}

.back-to-dir-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Lightbox Modal */
.lightbox-modal {
  position: fixed;
  inset: 0;
  background-color: rgba(5, 29, 56, 0.88);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: var(--space-6);
  cursor: zoom-out;
}

.lightbox-modal.active {
  display: flex;
}

.lightbox-modal img {
  max-width: min(90vw, 90%);
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   Math Formula Cards & LaTeX Display
   ========================================================================== */

.formula-card,
.math-formula-box {
  margin: var(--space-6) 0;
  padding: 16px 20px;
  background: linear-gradient(135deg, rgba(240, 249, 255, 0.75), var(--bg-surface));
  border: 1px solid #bae6fd;
  border-left: 4.5px solid var(--accent);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-card);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
  font-size: 1.05rem;
  line-height: 1.8;
}

.math-inline {
  display: inline-block;
  padding: 0 2px;
  vertical-align: -0.1em;
}

[data-theme="dark"] .formula-card,
[data-theme="dark"] .math-formula-box {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.85), #0d131f);
  border-color: #1e3a5f;
  border-left-color: #38bdf8;
}

/* MathJax Universal CHTML & SVG Sizing, Containment & Alignment */
mjx-container {
  max-width: 100% !important;
  outline: none !important;
  text-rendering: geometricPrecision;
  -webkit-font-smoothing: antialiased;
}

mjx-container[jax="CHTML"] {
  font-size: 100% !important;
}

mjx-container[display="true"] {
  display: block !important;
  text-align: center;
  max-width: 100% !important;
  overflow-x: auto !important;
  overflow-y: visible !important;
  padding: 6px 0 !important;
  -webkit-overflow-scrolling: touch !important;
}

.formula-card mjx-container[jax="SVG"],
.formula-card mjx-container[jax="CHTML"],
.math-formula-box mjx-container[jax="SVG"],
.math-formula-box mjx-container[jax="CHTML"] {
  margin: 0.2em 0 !important;
  outline: none !important;
  max-width: 100% !important;
  overflow-x: auto !important;
  overflow-y: visible !important;
  -webkit-overflow-scrolling: touch !important;
}

mjx-container:not([display="true"]),
.math-inline mjx-container[jax="SVG"],
.math-inline mjx-container[jax="CHTML"],
.math-inline mjx-container {
  display: inline-block !important;
  margin: 0 0.12em !important;
  vertical-align: -0.15em !important;
  overflow: visible !important;
  max-width: 100% !important;
}

mjx-container:not([display="true"]) svg,
.math-inline mjx-container svg {
  overflow: visible !important;
}

/* Badges for Examples and Practice */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 12px;
  font-family: var(--font-display);
  font-size: 0.72em;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.badge-navy {
  background-color: #eff6ff;
  color: #001f3f;
  border: 1px solid #bfdbfe;
}

[data-theme="dark"] .badge-navy {
  background-color: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  border-color: rgba(56, 189, 248, 0.3);
}

.badge-red {
  background-color: #fff1f2;
  color: #d90429;
  border: 1px solid #fecdd3;
}

[data-theme="dark"] .badge-red {
  background-color: rgba(244, 63, 94, 0.15);
  color: #fb7185;
  border-color: rgba(244, 63, 94, 0.3);
}

.example-heading,
.practice-heading {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: var(--space-8) !important;
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--border-default);
}

.practice-hint {
  background: rgba(5, 150, 105, 0.07);
  border: 1px solid #a7f3d0;
  border-left: 4px solid #059669;
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  margin: 12px 0;
  font-size: 0.95rem;
  line-height: 1.65;
}

[data-theme="dark"] .practice-hint {
  background: rgba(6, 78, 59, 0.22);
  border-color: #065f46;
  border-left-color: #10b981;
}

.practice-answer {
  background: rgba(2, 132, 199, 0.07);
  border: 1px solid #bae6fd;
  border-left: 4px solid #0284c7;
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  margin: 12px 0;
  font-size: 0.95rem;
  line-height: 1.65;
}

[data-theme="dark"] .practice-answer {
  background: rgba(12, 74, 110, 0.22);
  border-color: #0369a1;
  border-left-color: #38bdf8;
}

/* ==========================================================================
   Functional Units SVG Diagram
   ========================================================================== */

.architecture-diagram-container {
  margin: var(--space-8) 0;
}

.arch-diagram-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 18px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  box-shadow: var(--shadow-card);
}

.arch-diagram-title {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: 16px;
  text-align: center;
}

.arch-svg {
  width: 100%;
  min-width: 480px;
  height: auto;
  max-height: 420px;
  display: block;
}

.arch-box {
  fill: var(--bg-surface-subtle);
  stroke: var(--border-default);
  stroke-width: 1.5;
}

.arch-hub {
  fill: var(--accent-subtle);
  stroke: var(--accent);
  stroke-width: 2;
}

.arch-cpu {
  fill: var(--navy-banner-bg);
  stroke: var(--navy-banner-border);
}

.arch-label-bold {
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 700;
  fill: var(--text-primary);
}

.node-cpu .arch-label-bold {
  fill: #ffffff;
}

.arch-label-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--text-secondary);
}

.node-cpu .arch-label-sub {
  fill: #93c5fd;
}

.arch-line {
  stroke-width: 2;
}

.arch-data {
  stroke: var(--text-primary);
  fill: var(--text-primary);
}

.arch-ctrl {
  stroke: var(--accent);
  stroke-dasharray: 5 3;
  fill: none;
}

.arch-legend-text {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  fill: var(--text-secondary);
}

[data-theme="dark"] .arch-diagram-card {
  background-color: #0d131f;
  border-color: #1e293b;
}

[data-theme="dark"] .arch-hub {
  fill: rgba(56, 189, 248, 0.12);
  stroke: #38bdf8;
}

[data-theme="dark"] .arch-box {
  fill: #162032;
  stroke: #26334d;
}

[data-theme="dark"] .arch-label-bold {
  fill: #f1f5f9;
}

[data-theme="dark"] .arch-label-sub {
  fill: #94a3b8;
}

[data-theme="dark"] .arch-data {
  stroke: #cbd5e1;
  fill: #cbd5e1;
}

[data-theme="dark"] .arch-ctrl {
  stroke: #38bdf8;
}

/* ==========================================================================
   MCQ Question Cards (Examination & Revision Bank)
   ========================================================================== */
.mcq-card {
  background-color: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg, 10px);
  padding: 1.25rem 1.5rem;
  margin: 1.25rem 0 1.5rem 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  contain: layout style;
}

.mcq-card:hover {
  border-color: var(--border-default);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.mcq-card h3,
.mcq-card h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 0;
  margin-bottom: 0.85rem;
  line-height: 1.45;
}

.mcq-options {
  list-style: none !important;
  padding-left: 0 !important;
  margin: 0.75rem 0 1.25rem 0 !important;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
}

/* Compact 2-column mode for short plain-text options on wider screens */
@media (min-width: 680px) {
  .mcq-options.mcq-options-compact {
    grid-template-columns: repeat(2, 1fr);
  }
}

.mcq-options.mcq-options-stacked {
  grid-template-columns: 1fr !important;
}

.mcq-options li {
  padding: 0.75rem 1.05rem;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  font-size: 0.95rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 !important;
  transition: all var(--transition-fast);
  user-select: none;
  min-width: 0;
  overflow-x: auto;
  overflow-y: visible;
  -webkit-overflow-scrolling: touch;
}

.mcq-options li.mcq-option-interactive {
  cursor: pointer;
  position: relative;
}

.mcq-options li.mcq-option-interactive:hover {
  background: var(--bg-surface-subtle);
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.mcq-options li.mcq-option-interactive:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.mcq-options li strong {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--accent);
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-xs);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

/* Ensure MathJax SVG formulas inside MCQ option pills are never clipped */
.mcq-options li mjx-container {
  margin: 0 !important;
  padding: 2px 0 !important;
  max-width: none !important;
  overflow: visible !important;
  display: inline-flex !important;
  align-items: center;
  flex: 1;
}

.mcq-options li mjx-container svg {
  max-width: none !important;
  overflow: visible !important;
}

/* Custom subtle scrollbar for wide equations in options */
.mcq-options li::-webkit-scrollbar {
  height: 4px;
}

.mcq-options li::-webkit-scrollbar-track {
  background: transparent;
}

.mcq-options li::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: var(--radius-pill);
}

/* Correct selection */
.mcq-options li.mcq-option-correct {
  background: rgba(16, 185, 129, 0.12) !important;
  border-color: #10b981 !important;
  color: var(--text-primary) !important;
  box-shadow: 0 0 0 1px #10b981;
}

.mcq-options li.mcq-option-correct strong {
  background: #10b981 !important;
  color: #ffffff !important;
}

/* Wrong selection */
.mcq-options li.mcq-option-wrong {
  background: rgba(239, 68, 68, 0.1) !important;
  border-color: #ef4444 !important;
  color: var(--text-primary) !important;
  box-shadow: 0 0 0 1px #ef4444;
}

.mcq-options li.mcq-option-wrong strong {
  background: #ef4444 !important;
  color: #ffffff !important;
}

.mcq-option-status-icon {
  margin-left: auto;
  font-size: 0.85rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
}

.mcq-option-status-icon.correct {
  color: #10b981;
}

.mcq-option-status-icon.wrong {
  color: #ef4444;
}

/* Collapsible Solution Box */
.mcq-solution-wrapper {
  margin-top: 1rem;
}

.mcq-reveal-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.45rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  background: var(--bg-alt);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mcq-reveal-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--surface);
}

.mcq-reveal-icon svg {
  display: block;
  transition: transform var(--transition-fast);
}

.mcq-reveal-btn[aria-expanded="true"] .mcq-reveal-icon svg {
  transform: rotate(180deg);
}

.mcq-solution-body {
  margin-top: 0.65rem;
  animation: fadeIn 0.2s ease-out;
}

/* Top MCQ Practice Controller Bar */
.mcq-practice-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-left: 3.5px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.15rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.mcq-practice-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.mcq-practice-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.mcq-practice-title svg {
  color: var(--accent);
}

.mcq-practice-subtitle {
  font-size: 0.78rem;
  color: var(--text-tertiary);
}

.mcq-practice-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.mcq-score-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--accent-subtle);
  color: var(--accent);
  border: 1px solid rgba(var(--accent-rgb, 59, 130, 246), 0.2);
}

.mcq-toggle-all-btn,
.mcq-reset-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 4px;
  border: 1px solid var(--border-default);
  background: var(--bg-alt);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mcq-toggle-all-btn:hover,
.mcq-reset-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--surface);
}

.mcq-answer {
  background: rgba(16, 185, 129, 0.08) !important;
  border: 1px solid rgba(16, 185, 129, 0.25) !important;
  border-left: 3.5px solid #10b981 !important;
  border-radius: 6px !important;
  padding: 0.85rem 1.15rem !important;
  margin: 0 !important;
  color: var(--text-primary) !important;
  font-size: 0.95rem;
  line-height: 1.75;
}

.mcq-answer p {
  margin: 0.4rem 0 !important;
}

.mcq-answer p:first-child {
  margin-top: 0 !important;
}

.mcq-answer p:last-child {
  margin-bottom: 0 !important;
}

.mcq-answer strong {
  color: var(--text-primary);
  font-weight: 700;
}

.mcq-badge {
  display: none !important;
}

[data-theme="dark"] .mcq-card {
  background-color: var(--bg-surface);
  border-color: var(--border-default);
}

[data-theme="dark"] .mcq-card:hover {
  border-color: var(--border-strong);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

[data-theme="dark"] .mcq-options li {
  background: var(--bg-surface-elevated);
  border-color: var(--border-default);
}

[data-theme="dark"] .mcq-options li.mcq-option-interactive:hover {
  background: var(--bg-surface-subtle);
  border-color: var(--accent);
}

[data-theme="dark"] .mcq-answer {
  background: rgba(16, 185, 129, 0.12) !important;
  border-color: rgba(16, 185, 129, 0.3) !important;
  border-left-color: #34d399 !important;
}

/* Floating Action Button (Quick Scroll to Top for Long Notes) */
.reading-floating-actions {
  position: fixed;
  bottom: max(20px, var(--safe-bottom));
  right: max(20px, var(--safe-right));
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 40;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  transform: translate3d(0, 10px, 0);
  will-change: transform, opacity;
}

.reading-floating-actions.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translate3d(0, 0, 0);
}

.floating-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-pill);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
  cursor: pointer;
  touch-action: manipulation;
  transition: all var(--transition-fast);
}

.floating-action-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.floating-action-btn svg {
  width: 18px;
  height: 18px;
}

/* ==========================================================================
   Interactive Coding Practice Bank (CAT-1 Master Suite)
   ========================================================================== */

.coding-practice-bar {
  background: var(--bg-surface-elevated, var(--surface));
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg, 12px);
  padding: 0.85rem 1rem;
  margin: 1.5rem 0 2rem 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
  position: relative;
}

/* Toolbar & Filter Tabs */
.coding-toolbar-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.coding-filter-tabs {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.coding-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.tab-dot.dot-easy {
  background: #10b981;
}

.tab-dot.dot-medium {
  background: #f59e0b;
}

.tab-dot.dot-hard {
  background: #ef4444;
}

.coding-tab-btn.active .tab-dot {
  background: #ffffff;
}

.coding-tab-btn:hover {
  border-color: var(--accent);
  color: var(--text-primary);
  background: var(--bg-surface-subtle);
}

.coding-tab-btn.active {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
  box-shadow: 0 2px 6px rgba(var(--accent-rgb, 16, 185, 129), 0.25);
}

.coding-tab-btn.tab-easy.active {
  background: #10b981;
  border-color: #10b981;
}

.coding-tab-btn.tab-medium.active {
  background: #f59e0b;
  border-color: #f59e0b;
}

.coding-tab-btn.tab-hard.active {
  background: #ef4444;
  border-color: #ef4444;
}

.coding-tab-btn.tab-solved.active {
  background: #8b5cf6;
  border-color: #8b5cf6;
}

.coding-search-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 0.25rem 0.65rem;
  min-width: 260px;
  flex-grow: 1;
  max-width: 440px;
}

.coding-search-box svg {
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.coding-search-input {
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 0.84rem;
  outline: none;
  width: 100%;
}

.coding-search-input::placeholder {
  color: var(--text-tertiary);
}

.coding-reset-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-tertiary);
  font-size: 0.72rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.coding-reset-btn:hover {
  color: #ef4444;
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.06);
}

/* ==========================================================================
   Individual Coding Problem Card
   ========================================================================== */

/* ==========================================================================
   Individual Coding Problem Card (Ultra Compact & Sleek)
   ========================================================================== */

.coding-problem-card {
  background: var(--surface);
  border: 1px solid var(--border-default);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-md, 8px);
  padding: 0.75rem 1rem;
  margin: 0.65rem 0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.02);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  contain: layout style;
}

.coding-problem-card:hover {
  border-color: var(--border-strong);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.coding-problem-card.diff-easy {
  border-left-color: #10b981;
}

.coding-problem-card.diff-medium {
  border-left-color: #f59e0b;
}

.coding-problem-card.diff-hard {
  border-left-color: #ef4444;
}

.coding-problem-card.is-solved {
  border-left-color: #10b981;
  background: linear-gradient(to right, rgba(16, 185, 129, 0.04), var(--surface));
}

/* Card Header */
.coding-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 0.4rem;
}

.coding-card-title-group {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.coding-num-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}

.coding-problem-title {
  margin: 0 !important;
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.coding-card-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.coding-diff-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.12rem 0.45rem;
  border-radius: var(--radius-pill);
}

.coding-diff-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
}

.coding-diff-badge.diff-easy {
  background: rgba(16, 185, 129, 0.12);
  color: #059669;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.coding-diff-badge.diff-medium {
  background: rgba(245, 158, 11, 0.12);
  color: #d97706;
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.coding-diff-badge.diff-hard {
  background: rgba(239, 68, 68, 0.12);
  color: #dc2626;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.coding-topic-pill {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
}

/* Action Buttons */
.coding-starter-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.22rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.coding-starter-toggle-btn:hover,
.coding-starter-toggle-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-surface-subtle);
}

.coding-solve-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.22rem 0.55rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.coding-solve-btn:hover {
  border-color: #10b981;
  color: #059669;
  background: rgba(16, 185, 129, 0.06);
}

.coding-solve-btn.active {
  background: #10b981;
  border-color: #10b981;
  color: #ffffff;
}

/* Description Row */
.coding-desc-row {
  font-size: 0.9rem;
  color: var(--text-primary);
  line-height: 1.45;
  margin-bottom: 0.35rem;
}

.coding-desc-row p {
  margin: 0.2rem 0 !important;
}

.coding-desc-row code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.08rem 0.35rem;
  border-radius: 3px;
}

/* Meta Row (Format & Sample) */
.coding-meta-row {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 0.35rem;
}

.coding-format-pill,
.coding-sample-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 0.2rem 0.55rem;
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.35;
}

.coding-format-pill strong,
.coding-sample-pill strong {
  color: var(--text-primary);
  font-weight: 600;
}

.coding-format-pill code,
.coding-sample-pill code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  padding: 0.06rem 0.3rem;
  border-radius: 3px;
  color: var(--accent);
}

/* Judge Row */
.coding-judge-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  font-size: 0.78rem;
}

.judge-row-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.judge-chips-wrap {
  display: inline-flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  align-items: center;
}

.judge-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.12rem 0.45rem;
  border-radius: 3px;
  font-size: 0.76rem;
  color: var(--text-secondary);
}

.judge-chip code {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  padding: 0.05rem 0.25rem;
  border-radius: 3px;
  color: var(--accent);
}

/* Starter Code Drawer */
.coding-starter-drawer {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  margin-top: 0.45rem;
  padding: 0.45rem 0.65rem;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.35rem;
}

.drawer-lang {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
}

.mini-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.68rem;
  padding: 0.12rem 0.35rem;
  border-radius: 3px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mini-copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-surface);
}

.mini-copy-btn.copied {
  border-color: #10b981;
  color: #10b981;
  background: rgba(16, 185, 129, 0.08);
}

.drawer-pre {
  margin: 0 !important;
  background: var(--bg-code, #1e1e1e) !important;
  border-radius: 4px;
  padding: 0.6rem 0.75rem !important;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: #f8fafc;
  overflow-x: auto;
}

/* Dark Mode Overrides for Compact Coding Components */
[data-theme="dark"] .coding-problem-card {
  background: var(--bg-surface);
  border-color: var(--border-default);
}

[data-theme="dark"] .coding-problem-card:hover {
  border-color: var(--border-strong);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .coding-format-pill,
[data-theme="dark"] .coding-sample-pill,
[data-theme="dark"] .judge-chip {
  background: var(--bg-surface-elevated);
  border-color: var(--border-default);
}

[data-theme="dark"] .drawer-pre {
  background: #0f172a !important;
}

@media (max-width: 640px) {
  .coding-practice-header-row {
    flex-direction: column;
    align-items: stretch;
  }

  .coding-practice-stats-group {
    justify-content: space-between;
  }

  .coding-toolbar-row {
    flex-direction: column;
    align-items: stretch;
  }

  .coding-search-box {
    max-width: 100%;
  }

  .coding-card-header {
    flex-direction: column;
    align-items: flex-start;
  }
}




/* ==========================================================================
   Individual Coding Problem Card (LeetCode Aesthetic)
   ========================================================================== */

.coding-problem-card.leetcode-problem-card {
  background: var(--bg-surface, #ffffff);
  border: 1px solid var(--border-default, #e2e8f0);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-lg, 10px);
  padding: 1.15rem 1.35rem;
  margin: 1.25rem 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.coding-problem-card.leetcode-problem-card:hover {
  border-color: var(--border-strong, #cbd5e1);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.coding-problem-card.diff-easy {
  border-left-color: #10b981;
}

.coding-problem-card.diff-medium {
  border-left-color: #f59e0b;
}

.coding-problem-card.diff-hard {
  border-left-color: #ef4444;
}

.coding-problem-card.is-solved {
  border-left-color: #10b981;
  background: linear-gradient(to right, rgba(16, 185, 129, 0.04), var(--bg-surface, #ffffff));
}

/* Card Header */
.leetcode-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle, #f1f5f9);
  margin-bottom: 0.85rem;
}

.coding-card-title-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.coding-num-badge {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.12rem 0.45rem;
  border-radius: 4px;
}

.coding-problem-title {
  margin: 0 !important;
  font-family: var(--font-display, var(--font-sans));
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
}

.coding-card-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.coding-diff-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-pill);
}

.coding-diff-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.coding-diff-badge.diff-easy {
  background: rgba(16, 185, 129, 0.12);
  color: #059669;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.coding-diff-badge.diff-medium {
  background: rgba(245, 158, 11, 0.12);
  color: #d97706;
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.coding-diff-badge.diff-hard {
  background: rgba(239, 68, 68, 0.12);
  color: #dc2626;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.leetcode-topic-pills {
  display: inline-flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  align-items: center;
}

.coding-topic-pill {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.12rem 0.45rem;
  border-radius: 4px;
  font-family: var(--font-mono);
}

/* Action Buttons */
.coding-starter-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.28rem 0.65rem;
  border-radius: 5px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.coding-starter-toggle-btn:hover,
.coding-starter-toggle-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-surface-subtle);
}

.coding-solve-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.28rem 0.7rem;
  border-radius: 5px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.coding-solve-btn:hover {
  border-color: #10b981;
  color: #059669;
  background: rgba(16, 185, 129, 0.06);
}

.coding-solve-btn.active {
  background: #10b981;
  border-color: #10b981;
  color: #ffffff;
}

.coding-bookmark-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.28rem 0.65rem;
  border-radius: 5px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.coding-bookmark-btn:hover {
  border-color: #3b82f6;
  color: #2563eb;
  background: rgba(59, 130, 246, 0.06);
}

.coding-bookmark-btn.active {
  background: #3b82f6;
  border-color: #3b82f6;
  color: #ffffff;
}

.coding-tab-btn.tab-saved.active {
  background: #3b82f6;
  border-color: #3b82f6;
  color: #ffffff;
}

.bookmark-tag.bookmark-tag-question {
  background: rgba(59, 130, 246, 0.12);
  color: #2563eb;
  border-color: rgba(59, 130, 246, 0.25);
  display: inline-flex;
  align-items: center;
}

[data-theme="dark"] .coding-bookmark-btn:hover {
  background: rgba(59, 130, 246, 0.12);
  color: #60a5fa;
  border-color: #60a5fa;
}

[data-theme="dark"] .coding-bookmark-btn.active {
  background: #2563eb;
  border-color: #2563eb;
  color: #ffffff;
}

[data-theme="dark"] .bookmark-tag.bookmark-tag-question {
  background: rgba(59, 130, 246, 0.2);
  color: #93c5fd;
  border-color: rgba(59, 130, 246, 0.4);
}

/* Description Text */
.leetcode-desc-text {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.leetcode-desc-text p {
  margin: 0.35rem 0 !important;
}

.leetcode-desc-text code {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.1rem 0.38rem;
  border-radius: 4px;
  color: var(--accent);
}

/* LeetCode Example Box */
.leetcode-example-box {
  background: var(--bg-surface-subtle, #f8fafc);
  border: 1px solid var(--border-default, #e2e8f0);
  border-radius: 8px;
  padding: 0.85rem 1.1rem;
  margin-bottom: 0.9rem;
  font-size: 0.9rem;
}

.leetcode-example-header {
  margin-bottom: 0.45rem;
}

.leetcode-example-title {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-primary);
}

.leetcode-example-body {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-family: var(--font-mono);
}

.leetcode-io-row {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.leetcode-io-label {
  font-weight: 700;
  color: var(--text-secondary);
  min-width: 60px;
}

.leetcode-io-val code {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  padding: 0.12rem 0.5rem;
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 0.88rem;
}

/* LeetCode Constraints Box */
.leetcode-constraints-box {
  background: var(--bg-surface-subtle, #f8fafc);
  border: 1px dashed var(--border-default, #e2e8f0);
  border-radius: 8px;
  padding: 0.75rem 1.1rem;
  margin-bottom: 0.9rem;
}

.leetcode-constraints-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  margin-bottom: 0.45rem;
}

.leetcode-constraints-list {
  list-style: disc inside;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.constraint-item {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

.constraint-strong {
  color: var(--text-primary);
  font-weight: 600;
}

.constraint-item code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  padding: 0.06rem 0.35rem;
  border-radius: 3px;
  color: var(--accent);
}

/* LeetCode Judge Test Cases Box */
.leetcode-judge-box {
  background: var(--bg-surface-subtle, #f8fafc);
  border: 1px solid var(--border-subtle, #e2e8f0);
  border-radius: 8px;
  padding: 0.75rem 1.1rem;
  margin-bottom: 0.75rem;
}

.leetcode-judge-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  margin-bottom: 0.45rem;
}

.judge-chips-wrap {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  align-items: center;
}

.judge-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  padding: 0.2rem 0.55rem;
  border-radius: 5px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.judge-chip code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  background: transparent;
  padding: 0;
  border: none;
}

/* Starter Code Drawer */
.coding-starter-drawer {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  margin-top: 0.65rem;
  padding: 0.65rem 0.85rem;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.45rem;
}

.drawer-header-left {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.drawer-lang-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: var(--accent-subtle, rgba(16, 185, 129, 0.1));
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
}

.drawer-title {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.mini-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.72rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mini-copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-surface);
}

.mini-copy-btn.copied {
  border-color: #10b981;
  color: #10b981;
  background: rgba(16, 185, 129, 0.08);
}

.drawer-pre {
  margin: 0 !important;
  background: var(--bg-code, #1e1e1e) !important;
  border-radius: 6px;
  padding: 0.75rem 0.9rem !important;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: #f8fafc;
  overflow-x: auto;
}

/* Dark Mode Overrides for LeetCode Components */
[data-theme="dark"] .coding-problem-card.leetcode-problem-card {
  background: #111827;
  border-color: #1f2937;
}

[data-theme="dark"] .coding-problem-card.leetcode-problem-card:hover {
  border-color: #374151;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .leetcode-card-header {
  border-bottom-color: #1f2937;
}

[data-theme="dark"] .leetcode-example-box,
[data-theme="dark"] .leetcode-judge-box {
  background: #0d131f;
  border-color: #1e293b;
}

[data-theme="dark"] .leetcode-constraints-box {
  background: #0d131f;
  border-color: #26334d;
}

[data-theme="dark"] .leetcode-io-val code,
[data-theme="dark"] .judge-chip,
[data-theme="dark"] .constraint-item code {
  background: #162032;
  border-color: #26334d;
}

[data-theme="dark"] .drawer-pre {
  background: #0f172a !important;
}

@media (max-width: 640px) {
  .coding-practice-header-row {
    flex-direction: column;
    align-items: stretch;
  }

  .coding-practice-stats-group {
    justify-content: space-between;
  }

  .coding-toolbar-row {
    flex-direction: column;
    align-items: stretch;
  }

  .coding-search-box {
    max-width: 100%;
  }

  .leetcode-card-header {
    flex-direction: column;
    align-items: flex-start;
  }
}


/* ==========================================================================
   Individual Coding Problem Card (Clean, Simple & Modern)
   ========================================================================== */

.coding-problem-card {
  background: var(--bg-surface, #ffffff);
  border: 1px solid var(--border-default, #e2e8f0);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md, 8px);
  padding: 0.9rem 1.15rem;
  margin: 0.85rem 0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.02);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.coding-problem-card:hover {
  border-color: var(--border-strong, #cbd5e1);
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.06);
}

.coding-problem-card.diff-easy {
  border-left-color: #10b981;
}

.coding-problem-card.diff-medium {
  border-left-color: #f59e0b;
}

.coding-problem-card.diff-hard {
  border-left-color: #ef4444;
}

.coding-problem-card.is-solved {
  border-left-color: #10b981;
  background: linear-gradient(to right, rgba(16, 185, 129, 0.04), var(--bg-surface, #ffffff));
}

/* Header */
.coding-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}

.coding-card-title-group {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.coding-num-badge {
  font-family: var(--font-mono, monospace);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}

.coding-problem-title {
  margin: 0 !important;
  font-family: var(--font-display, var(--font-sans));
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
}

/* Simple Difficulty Badge matching user screenshot */
.coding-diff-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.15rem 0.55rem;
  border-radius: 9999px;
  line-height: 1;
}

.coding-diff-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.coding-diff-badge.diff-easy {
  background: rgba(16, 185, 129, 0.14);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.coding-diff-badge.diff-medium {
  background: rgba(245, 158, 11, 0.14);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.coding-diff-badge.diff-hard {
  background: rgba(239, 68, 68, 0.14);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Topic Pills matching user screenshot */
.leetcode-topic-pills {
  display: inline-flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  align-items: center;
}

.coding-topic-pill {
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--text-secondary, #94a3b8);
  background: var(--bg-surface-subtle, #161f2e);
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  line-height: 1.2;
}

/* Action Buttons */
.coding-card-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.coding-starter-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.22rem 0.55rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.coding-starter-toggle-btn:hover,
.coding-starter-toggle-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-surface-subtle);
}

.coding-bookmark-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.22rem 0.55rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.coding-bookmark-btn:hover {
  border-color: #3b82f6;
  color: #2563eb;
  background: rgba(59, 130, 246, 0.06);
}

.coding-bookmark-btn.active {
  background: #3b82f6;
  border-color: #3b82f6;
  color: #ffffff;
}

.coding-solve-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.22rem 0.6rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.coding-solve-btn:hover {
  border-color: #10b981;
  color: #059669;
  background: rgba(16, 185, 129, 0.06);
}

.coding-solve-btn.active {
  background: #10b981;
  border-color: #10b981;
  color: #ffffff;
}

/* Card Body */
.coding-desc-text {
  font-size: 0.92rem;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 0.45rem;
}

.coding-desc-text code {
  font-family: var(--font-mono, monospace);
  font-size: 0.84rem;
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.08rem 0.35rem;
  border-radius: 3px;
  color: var(--accent);
}

/* Compact Meta Row */
.coding-compact-meta-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.35rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.12rem 0.45rem;
  border-radius: 4px;
}

.meta-pill strong {
  color: var(--text-primary);
  font-weight: 600;
}

.meta-pill code {
  font-family: var(--font-mono, monospace);
  font-size: 0.8rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  padding: 0.05rem 0.25rem;
  border-radius: 3px;
  color: var(--accent);
}

/* Compact Judge Row */
.coding-compact-judge-row {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
  font-size: 0.78rem;
}

.judge-row-label {
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
  margin-right: 0.2rem;
}

.judge-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.12rem 0.45rem;
  border-radius: 4px;
  font-family: var(--font-mono, monospace);
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.judge-chip code {
  font-family: var(--font-mono, monospace);
  font-size: 0.78rem;
  color: var(--accent);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  padding: 0.04rem 0.25rem;
  border-radius: 3px;
}

/* Starter Code Drawer */
.coding-starter-drawer {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  margin-top: 0.5rem;
  padding: 0.5rem 0.75rem;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.35rem;
}

.drawer-title {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.mini-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.7rem;
  padding: 0.12rem 0.38rem;
  border-radius: 3px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mini-copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-surface);
}

.mini-copy-btn.copied {
  border-color: #10b981;
  color: #10b981;
  background: rgba(16, 185, 129, 0.08);
}

.drawer-pre {
  margin: 0 !important;
  background: #0f172a !important;
  border-radius: 4px;
  padding: 0.65rem 0.8rem !important;
  font-size: 0.8rem;
  font-family: var(--font-mono, monospace);
  color: #f8fafc;
  overflow-x: auto;
}

/* Dark Mode Overrides */
[data-theme="dark"] .coding-problem-card {
  background: #111827;
  border-color: #1f2937;
}

[data-theme="dark"] .coding-problem-card:hover {
  border-color: #374151;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .meta-pill,
[data-theme="dark"] .judge-chip {
  background: #161f2e;
  border-color: #243044;
}

[data-theme="dark"] .meta-pill code,
[data-theme="dark"] .judge-chip code {
  background: #0f172a;
  border-color: #1e293b;
}

[data-theme="dark"] .coding-topic-pill {
  background: #161f2e;
  border-color: rgba(255, 255, 255, 0.08);
  color: #94a3b8;
}

@media (max-width: 640px) {
  .coding-card-header {
    flex-direction: column;
    align-items: flex-start;
  }
}


/* ==========================================================================
   Individual Coding Problem Item (Simple, Clean Flow)
   ========================================================================== */

.coding-problem-item {
  margin: 1.5rem 0 2rem 0;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  transition: opacity var(--transition-fast);
}

.coding-problem-item.is-solved {
  opacity: 0.88;
}

.coding-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-bottom: 0.65rem;
}

.coding-card-title-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.coding-problem-title {
  margin: 0 !important;
  font-family: var(--font-display, var(--font-sans));
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
}

/* Simple Difficulty Badge matching user screenshot */
.coding-diff-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.15rem 0.55rem;
  border-radius: 9999px;
  line-height: 1;
}

.coding-diff-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.coding-diff-badge.diff-easy {
  background: rgba(16, 185, 129, 0.14);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.coding-diff-badge.diff-medium {
  background: rgba(245, 158, 11, 0.14);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.coding-diff-badge.diff-hard {
  background: rgba(239, 68, 68, 0.14);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Topic Pills matching user screenshot */
.leetcode-topic-pills {
  display: inline-flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  align-items: center;
}

.coding-topic-pill {
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--text-secondary, #94a3b8);
  background: var(--bg-surface-subtle, #161f2e);
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  line-height: 1.2;
}

/* Action Buttons */
.coding-card-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.coding-bookmark-btn,
.coding-solve-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.22rem 0.55rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.coding-bookmark-btn:hover {
  border-color: #3b82f6;
  color: #2563eb;
  background: rgba(59, 130, 246, 0.06);
}

.coding-bookmark-btn.active {
  background: #3b82f6;
  border-color: #3b82f6;
  color: #ffffff;
}

.coding-solve-btn:hover {
  border-color: #10b981;
  color: #059669;
  background: rgba(16, 185, 129, 0.06);
}

.coding-solve-btn.active {
  background: #10b981;
  border-color: #10b981;
  color: #ffffff;
}

/* Dark Mode Overrides */
[data-theme="dark"] .coding-topic-pill {
  background: #161f2e;
  border-color: rgba(255, 255, 255, 0.08);
  color: #94a3b8;
}

@media (max-width: 640px) {
  .coding-item-header {
    flex-direction: column;
    align-items: flex-start;
  }
}


/* ==========================================================================
   Individual Coding Problem Item (Spacious, Clean & Readable)
   ========================================================================== */

.coding-problem-item {
  margin: 2rem 0 2.25rem 0;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-default, #243044);
  transition: opacity var(--transition-fast);
}

.coding-problem-item:last-of-type {
  border-bottom: none;
}

.coding-problem-item.is-solved {
  opacity: 0.85;
}

.coding-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.85rem;
}

.coding-card-title-group {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.coding-problem-title {
  margin: 0 !important;
  font-family: var(--font-display, var(--font-sans));
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
}

/* Difficulty Badge matching user screenshot */
.coding-diff-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.16rem 0.55rem;
  border-radius: 9999px;
  line-height: 1;
}

.coding-diff-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.coding-diff-badge.diff-easy {
  background: rgba(16, 185, 129, 0.14);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.coding-diff-badge.diff-medium {
  background: rgba(245, 158, 11, 0.14);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.coding-diff-badge.diff-hard {
  background: rgba(239, 68, 68, 0.14);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Action Buttons */
.coding-card-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.coding-bookmark-btn,
.coding-solve-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-size: 0.76rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 5px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.coding-bookmark-btn:hover {
  border-color: #3b82f6;
  color: #2563eb;
  background: rgba(59, 130, 246, 0.06);
}

.coding-bookmark-btn.active {
  background: #3b82f6;
  border-color: #3b82f6;
  color: #ffffff;
}

.coding-solve-btn:hover {
  border-color: #10b981;
  color: #059669;
  background: rgba(16, 185, 129, 0.06);
}

.coding-solve-btn.active {
  background: #10b981;
  border-color: #10b981;
  color: #ffffff;
}

/* Problem Description & Content Typography */
.coding-problem-item p {
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--text-primary);
  margin: 0.75rem 0 0.95rem 0 !important;
}

.coding-problem-item p code,
.coding-problem-item li code {
  font-family: var(--font-mono, monospace);
  font-size: 0.86rem;
  background: var(--bg-surface-subtle, rgba(255, 255, 255, 0.06));
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
  padding: 0.08rem 0.35rem;
  border-radius: 4px;
  color: var(--text-primary, #f1f5f9);
}

.coding-problem-item ul {
  margin: 0.65rem 0 0 0 !important;
  padding-left: 1.35rem !important;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.coding-specs-list {
  list-style: none !important;
  padding-left: 0 !important;
  margin: 0.75rem 0 0.35rem 0 !important;
  display: flex;
  flex-direction: column;
  gap: 0.4rem !important;
}

.coding-spec-item {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  flex-wrap: wrap;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

.coding-spec-item .spec-label {
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  font-size: 0.84rem;
}

.coding-spec-item .spec-detail {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.coding-spec-item .spec-chip {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.coding-spec-item .spec-sep {
  color: var(--text-tertiary);
  margin: 0 0.2rem;
  opacity: 0.6;
}

.coding-spec-item .spec-arrow {
  color: var(--accent, #10b981);
  font-weight: 700;
  margin: 0 0.15rem;
}

.coding-spec-item .judge-case {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.coding-spec-item .case-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-right: 0.15rem;
}

.coding-spec-item code {
  font-family: var(--font-mono, monospace);
  font-size: 0.82rem;
  background: var(--bg-surface-subtle, rgba(255, 255, 255, 0.06));
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
  padding: 0.08rem 0.35rem;
  border-radius: 4px;
  color: var(--text-primary);
}

.coding-problem-item li {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.coding-problem-item li strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Dark Mode Overrides */
[data-theme="dark"] .coding-problem-item {
  border-bottom-color: #1e293b;
}

[data-theme="dark"] .coding-problem-item p code,
[data-theme="dark"] .coding-problem-item li code,
[data-theme="dark"] .coding-spec-item code {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.1);
  color: #e2e8f0;
}

@media (max-width: 640px) {
  .coding-item-header {
    flex-direction: column;
    align-items: flex-start;
  }
}


/* ==========================================================================
   Individual Coding Problem Item (Natural, Clean & Readable Prose)
   ========================================================================== */

.coding-problem-item {
  margin: 1.85rem 0 2rem 0;
  padding-bottom: 1.85rem;
  border-bottom: 1px solid var(--border-default, #243044);
  transition: opacity var(--transition-fast);
}

.coding-problem-item:last-of-type {
  border-bottom: none;
}

.coding-problem-item.is-solved {
  opacity: 0.85;
}

.coding-problem-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 0.65rem;
}

.coding-problem-text {
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--text-primary);
  margin: 0 !important;
  flex: 1;
}

.coding-sr-no {
  font-family: var(--font-display, var(--font-sans));
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-right: 0.15rem;
}

/* Difficulty Tag - Sleek, Clean Non-Pill Style (Inline at end of question) */
.coding-diff-badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-sans, system-ui, -apple-system, sans-serif);
  font-size: 0.74rem;
  font-weight: 600;
  line-height: 1.2;
  padding: 0.12rem 0.42rem;
  border-radius: 4px;
  letter-spacing: 0.01em;
  vertical-align: middle;
  margin-left: 0.45rem;
  white-space: nowrap;
}

.coding-diff-badge.diff-easy {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.coding-diff-badge.diff-medium {
  background: rgba(245, 158, 11, 0.12);
  color: #d97706;
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.coding-diff-badge.diff-hard {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

[data-theme="dark"] .coding-diff-badge.diff-medium {
  color: #fbbf24;
}

/* Action Buttons */
.coding-card-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.coding-bookmark-btn,
.coding-solve-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-size: 0.76rem;
  font-weight: 600;
  padding: 0.22rem 0.6rem;
  border-radius: 5px;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.coding-bookmark-btn:hover {
  border-color: #3b82f6;
  color: #2563eb;
  background: rgba(59, 130, 246, 0.06);
}

.coding-bookmark-btn.active {
  background: #3b82f6;
  border-color: #3b82f6;
  color: #ffffff;
}

.coding-solve-btn:hover {
  border-color: #10b981;
  color: #059669;
  background: rgba(16, 185, 129, 0.06);
}

.coding-solve-btn.active {
  background: #10b981;
  border-color: #10b981;
  color: #ffffff;
}

/* Problem Description & Content Typography - Clean Prose */
.coding-problem-item p {
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--text-primary);
  margin: 0.75rem 0 0.95rem 0 !important;
}

.coding-problem-item p code,
.coding-problem-item li code {
  font-family: var(--font-mono, monospace);
  font-size: 0.92em;
  background: transparent !important;
  border: none !important;
  padding: 0 !important;
  color: inherit !important;
  font-weight: 600;
}

.coding-problem-item ul {
  margin: 0.65rem 0 0 0 !important;
  padding-left: 1.35rem !important;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.coding-problem-item li {
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.coding-problem-item li strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Dark Mode Overrides */
[data-theme="dark"] .coding-problem-item {
  border-bottom-color: #1e293b;
}

@media (max-width: 680px) {
  .coding-problem-row {
    flex-direction: column;
    gap: 0.65rem;
  }
}

/* ==========================================================================
   Coding Bank Solution Accordion (<details class="coding-solution">)
   ========================================================================== */

details.coding-solution {
  margin: 0.75rem 0 0.5rem 0;
  border-radius: var(--radius-sm, 6px);
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
  background: var(--bg-surface, #111827);
  overflow: hidden;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

details.coding-solution:hover {
  border-color: var(--border-default, rgba(255, 255, 255, 0.16));
}

details.coding-solution[open] {
  border-color: var(--border-default, rgba(255, 255, 255, 0.16));
  background: var(--bg-surface, #111827);
}

details.coding-solution>summary {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.48rem 0.85rem;
  font-family: var(--font-sans, system-ui, -apple-system, sans-serif);
  font-size: var(--text-xs, 0.8125rem);
  font-weight: 500;
  color: var(--text-secondary, #94a3b8);
  cursor: pointer;
  user-select: none;
  list-style: none;
  background: transparent;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

details.coding-solution>summary::-webkit-details-marker,
details.coding-solution>summary::marker {
  display: none;
}

/* Minimalist arrow */
details.coding-solution>summary::before {
  content: "";
  display: inline-block;
  width: 0;
  height: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 5px solid currentColor;
  margin-right: 0.25rem;
  transition: transform 0.15s ease;
}

details.coding-solution[open]>summary::before {
  transform: rotate(90deg);
}

details.coding-solution>summary:hover {
  color: var(--text-primary, #f1f5f9);
  background: rgba(255, 255, 255, 0.03);
}

details.coding-solution[open]>summary {
  color: var(--text-primary, #f1f5f9);
  border-bottom: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
}

details.coding-solution .code-block-wrapper,
details.coding-solution pre {
  margin: 0 !important;
  border-radius: 0 !important;
  border: none !important;
}

/* Light Theme */
[data-theme="light"] details.coding-solution {
  background: #f8fafc;
  border-color: #e2e8f0;
}

[data-theme="light"] details.coding-solution:hover,
[data-theme="light"] details.coding-solution[open] {
  border-color: #cbd5e1;
}

[data-theme="light"] details.coding-solution>summary {
  color: #64748b;
}

[data-theme="light"] details.coding-solution>summary:hover,
[data-theme="light"] details.coding-solution[open]>summary {
  color: #0f172a;
  background: rgba(0, 0, 0, 0.02);
  border-bottom-color: #e2e8f0;
}

/* ==========================================================================
   Mock Test Overview Hero & Cards (SPC CAT-1 Mock Revision Suite)
/* ==========================================================================
   Mock Test Accordion Section Rows (Matching Subject List Aesthetics)
   ========================================================================== */

.mock-sections-accordion {
  margin: 1.5rem 0 2.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.mock-section-block,
.note-content a.mock-section-block,
.note-content a.mock-section-block:hover,
.note-content .mock-section-block,
.note-content .mock-section-block *,
.note-content .mock-section-row,
.note-content .mock-section-num,
.note-content .mock-section-title,
.note-content .mock-section-meta {
  text-decoration: none !important;
  text-decoration-line: none !important;
}

.note-content a.mock-section-block {
  color: inherit !important;
}

.mock-section-block {
  display: block;
  text-decoration: none !important;
  color: inherit;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md, 6px);
  overflow: hidden;
  transform: none !important;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.mock-section-block:hover {
  border-color: var(--accent);
  box-shadow: none;
  transform: none !important;
}

.mock-section-block.is-expanded {
  border-color: var(--accent);
  background: var(--bg-surface);
  transform: none !important;
}

.mock-section-row {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  align-items: center;
  padding: 18px 22px;
  gap: 1rem;
  cursor: pointer;
  user-select: none;
  background: transparent;
  text-decoration: none !important;
  transform: none !important;
  transition: background-color var(--transition-fast);
}

.mock-section-row:hover {
  background: var(--accent-subtle);
  transform: none !important;
}

.mock-section-num {
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-tertiary);
  letter-spacing: 0.04em;
  text-decoration: none !important;
  transform: none !important;
  transition: color var(--transition-fast);
}

.mock-section-block:hover .mock-section-num,
.mock-section-block.is-expanded .mock-section-num {
  color: var(--accent);
  transform: none !important;
}

.mock-section-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  transform: none !important;
}

.mock-section-title {
  display: block;
  margin: 0 !important;
  padding: 0 !important;
  border: none !important;
  font-family: var(--font-display, var(--font-sans));
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
  transform: none !important;
  transition: color var(--transition-fast);
}

.mock-section-block:hover .mock-section-title,
.mock-section-block.is-expanded .mock-section-title {
  color: var(--accent);
  transform: none !important;
}

.mock-section-meta {
  font-size: 0.82rem;
  color: var(--text-tertiary);
  line-height: 1.4;
  transform: none !important;
}

.mock-section-badge-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm, 4px);
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  transform: none !important;
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.mock-section-badge-cta.is-completed {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.35);
  color: #34d399;
}

.mock-section-block:hover .mock-section-badge-cta.is-completed {
  background: #059669;
  border-color: #10b981;
  color: #ffffff;
  transform: none !important;
}

.mock-section-badge-cta.is-resumable {
  background: rgba(245, 158, 11, 0.14);
  border-color: rgba(245, 158, 11, 0.4);
  color: #fbbf24;
}

.mock-section-block:hover .mock-section-badge-cta.is-resumable {
  background: #d97706;
  border-color: #f59e0b;
  color: #ffffff;
  transform: none !important;
}

.mock-section-block.is-resumable:hover {
  border-color: rgba(245, 158, 11, 0.45);
}

.mock-section-block:hover .mock-section-badge-cta {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--text-inverse, #0d0f12);
  transform: none !important;
}

.mock-section-arrow {
  width: 18px;
  height: 18px;
  stroke: var(--text-tertiary);
  transition: stroke var(--transition-fast);
  justify-self: end;
  transform: none !important;
}

.mock-section-block:hover .mock-section-arrow {
  stroke: var(--accent);
  transform: none !important;
}

.mock-section-block.is-expanded .mock-section-arrow {
  stroke: var(--accent);
  transform: rotate(90deg) !important;
}

.mock-section-body {
  padding: 12px 20px 24px 20px;
  border-top: 1px solid var(--border-subtle, #1e293b);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Minimalist Collapsible Solution Box */
details.coding-solution {
  margin: 1.15rem 0 1.5rem 0;
  border: 1px solid var(--border-default, #1e293b);
  border-radius: var(--radius-md, 8px);
  background: var(--bg-surface, #0b0f19);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

details.coding-solution summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary, #94a3b8);
  background: var(--bg-surface-subtle, #111827);
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

details.coding-solution summary::-webkit-details-marker {
  display: none;
}

details.coding-solution summary::after {
  content: "Reveal Solution";
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--text-tertiary, #64748b);
  border: 1px solid var(--border-subtle, #334155);
  padding: 0.15rem 0.55rem;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

details.coding-solution[open] summary::after {
  content: "Hide Solution";
  color: var(--text-secondary, #94a3b8);
  border-color: var(--border-default, #475569);
}

details.coding-solution summary:hover {
  color: var(--text-primary, #f8fafc);
  background: var(--bg-surface-hover, #1e293b);
}

details.coding-solution summary:hover::after {
  color: var(--text-primary, #f8fafc);
  border-color: var(--border-strong, #64748b);
}

details.coding-solution[open] summary {
  border-bottom: 1px solid var(--border-default, #1e293b);
}

details.coding-solution .coding-solution-body {
  padding: 0;
  margin: 0;
}

details.coding-solution .coding-solution-body pre,
details.coding-solution .coding-solution-body .code-block-wrapper {
  margin: 0 !important;
  border: none !important;
  border-radius: 0 !important;
}

/* Light Mode Overrides */
[data-theme="light"] details.coding-solution {
  background: #ffffff;
  border-color: #e2e8f0;
}

[data-theme="light"] details.coding-solution summary {
  background: #f8fafc;
  color: #475569;
}

[data-theme="light"] details.coding-solution summary::after {
  border-color: #cbd5e1;
  color: #64748b;
}

[data-theme="light"] details.coding-solution summary:hover {
  background: #f1f5f9;
  color: #0f172a;
}

[data-theme="light"] details.coding-solution[open] summary {
  border-bottom-color: #e2e8f0;
}

[data-theme="light"] .mock-section-block {
  background: #ffffff;
  border-color: #e2e8f0;
}

[data-theme="light"] .mock-section-block:hover {
  border-color: var(--accent, #285582);
  box-shadow: none;
}

[data-theme="light"] .mock-section-row:hover {
  background: var(--accent-subtle, #edf3f8);
}

/* ==========================================================================
   StudyDump Mock Examination UI (Restrained & Scholarly)
   ========================================================================== */

/* 1. Exam Sticky Toolbar */
.exam-hud {
  position: sticky;
  top: 56px;
  z-index: 80;
  margin: 0 0 2rem 0;
  padding: 0.65rem 1rem;
  background: var(--bg-surface, #0f1626);
  border: 1px solid var(--border-default, rgba(255, 255, 255, 0.12));
  border-radius: var(--radius-md, 6px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: border-color var(--transition-fast);
}

.exam-hud-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.exam-hud-info {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
}

.exam-hud-badge {
  font-family: var(--font-mono, monospace);
  font-size: var(--text-2xs, 0.75rem);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  background: var(--bg-surface-subtle, #172033);
  color: var(--accent, #60a5fa);
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
}

.exam-hud-name {
  font-family: var(--font-display, var(--font-sans));
  font-size: var(--text-sm, 0.875rem);
  font-weight: 600;
  color: var(--text-primary, #f8fafc);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.exam-hud-timer-wrap {
  display: flex;
  align-items: center;
}

.exam-timer-box {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  background: var(--bg-surface-subtle, #172033);
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
  color: var(--text-primary, #f8fafc);
}

.exam-timer-box.is-paused {
  border-color: rgba(245, 158, 11, 0.4);
}

.exam-time-digits {
  font-family: var(--font-mono, monospace);
  font-size: var(--text-md, 1.0625rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--accent, #60a5fa);
}

.exam-timer-box.is-warning .exam-time-digits {
  color: #fbbf24;
}

.exam-timer-box.is-danger .exam-time-digits {
  color: #f87171;
}

.exam-timer-box.is-ended .exam-time-digits {
  color: var(--text-tertiary, #85837c);
}

.exam-pause-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 3px;
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
  background: transparent;
  color: var(--text-tertiary, #85837c);
  cursor: pointer;
  margin-left: 0.2rem;
  padding: 0;
  transition: all var(--transition-fast);
}

.exam-pause-btn:hover {
  color: var(--text-primary, #f8fafc);
  background: var(--bg-surface-elevated, #141c2e);
  border-color: var(--border-default, rgba(255, 255, 255, 0.12));
}

.exam-hud-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.exam-palette {
  display: flex;
  align-items: center;
  gap: 4px;
}

.exam-palette-item {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background: var(--bg-surface-subtle, #172033);
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
  color: var(--text-secondary, #94a3b8);
  font-family: var(--font-mono, monospace);
  font-size: var(--text-2xs, 0.75rem);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.exam-palette-item:hover {
  color: var(--text-primary, #f8fafc);
  border-color: var(--border-strong, rgba(255, 255, 255, 0.25));
}

.exam-palette-item.is-solved {
  background: rgba(47, 105, 70, 0.2);
  border-color: rgba(47, 105, 70, 0.4);
  color: #4ade80;
}

.exam-palette-item.is-flagged {
  border-color: #fbbf24;
}

.exam-palette-item.is-flagged .palette-dot {
  position: absolute;
  top: 3px;
  right: 3px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #fbbf24;
}

.exam-hud-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.exam-progress-text {
  font-size: var(--text-xs, 0.8125rem);
  color: var(--text-tertiary, #85837c);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.exam-submit-btn,
.exam-retake-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.8rem;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: var(--text-xs, 0.8125rem);
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.exam-submit-btn {
  background: var(--accent, #285582);
  border: 1px solid var(--accent-border, #3b82f6);
  color: #ffffff;
}

.exam-submit-btn:hover {
  background: var(--accent-hover, #1c3f63);
}

.exam-retake-btn {
  background: var(--bg-surface-subtle, #172033);
  border: 1px solid var(--border-default, rgba(255, 255, 255, 0.12));
  color: var(--text-primary, #f8fafc);
}

.exam-retake-btn:hover {
  border-color: var(--border-strong, rgba(255, 255, 255, 0.25));
}

/* 2. Question Item Card */
.exam-question-item {
  margin: 1.5rem 0 2.5rem 0;
  border: 1px solid var(--border-default, rgba(255, 255, 255, 0.12));
  border-radius: var(--radius-md, 6px);
  background: var(--bg-surface, #0f1626);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.exam-question-item.is-solved {
  border-color: var(--border-default, rgba(255, 255, 255, 0.12));
}

.exam-q-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.95rem;
  background: var(--bg-surface-subtle, #172033);
  border-bottom: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
  gap: 0.75rem;
}

.exam-q-topbar-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.exam-q-num {
  font-family: var(--font-mono, monospace);
  font-size: var(--text-xs, 0.8125rem);
  font-weight: 700;
  color: var(--text-primary, #f8fafc);
}

.exam-diff-tag {
  font-size: var(--text-3xs, 0.6875rem);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
}

.exam-diff-tag.diff-easy {
  background: rgba(47, 105, 70, 0.15);
  color: #4ade80;
  border: 1px solid rgba(47, 105, 70, 0.3);
}

.exam-diff-tag.diff-medium {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.exam-diff-tag.diff-hard {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.exam-q-topbar-right {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.exam-btn-flag,
.exam-btn-solve {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  font-size: var(--text-3xs, 0.6875rem);
  font-weight: 500;
  cursor: pointer;
  background: transparent;
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
  color: var(--text-secondary, #94a3b8);
  transition: all var(--transition-fast);
}

.exam-btn-flag:hover {
  color: #fbbf24;
  border-color: #fbbf24;
}

.exam-btn-flag.active {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.35);
  color: #fbbf24;
}

.exam-btn-solve:hover {
  color: #4ade80;
  border-color: #4ade80;
}

.exam-btn-solve.active {
  background: rgba(47, 105, 70, 0.15);
  border-color: rgba(47, 105, 70, 0.35);
  color: #4ade80;
}

/* Full Page Viewport Takeover for Exam Mode */
body.is-exam-mode {
  height: 100vh !important;
  max-height: 100vh !important;
  width: 100vw !important;
  max-width: 100vw !important;
  overflow: hidden !important;
  margin: 0 !important;
  padding: 0 !important;
  background: #070a11 !important;
  position: fixed !important;
  inset: 0 !important;
  color: #f1f5f9 !important;
  font-family: var(--font-sans, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif) !important;
}

/* Hide ALL non-exam reading chrome */
body.is-exam-mode .site-header,
body.is-exam-mode #site-header,
body.is-exam-mode .site-footer,
body.is-exam-mode #breadcrumbs-container,
body.is-exam-mode .breadcrumbs-bar,
body.is-exam-mode .note-header,
body.is-exam-mode .mobile-toc,
body.is-exam-mode details.mobile-toc,
body.is-exam-mode .table-of-contents,
body.is-exam-mode .toc-sidebar,
body.is-exam-mode aside.toc-sidebar,
body.is-exam-mode .note-sidebar-left,
body.is-exam-mode .note-sidebar-right,
body.is-exam-mode .reading-floating-actions,
body.is-exam-mode #floating-top-btn,
body.is-exam-mode #reading-progress,
body.is-exam-mode #reading-progress-bar,
body.is-exam-mode #back-to-top,
body.is-exam-mode .skip-link,
body.is-exam-mode .note-nav-footer,
body.is-exam-mode #note-nav-footer,
body.is-exam-mode .back-to-dir-row,
body.is-exam-mode .curation-ribbon,
body.is-exam-mode .mobile-bottom-nav,
body.is-exam-mode .exam-intro-bar,
body.is-exam-mode .exam-q-topbar {
  display: none !important;
}

/* Parent Containers Full Viewport Fitting */
body.is-exam-mode #main-content,
body.is-exam-mode .page-container.note-page-container,
body.is-exam-mode .reading-layout,
body.is-exam-mode #note-article-container,
body.is-exam-mode #article-content {
  width: 100vw !important;
  max-width: 100vw !important;
  height: 100vh !important;
  max-height: 100vh !important;
  margin: 0 !important;
  padding: 0 !important;
  border: none !important;
  overflow: hidden !important;
  display: flex !important;
  flex-direction: column !important;
  grid-template-columns: none !important;
  box-sizing: border-box !important;
  background: #070a11 !important;
}

/* ==========================================================================
   Top Navigation Bar (StudyDump | SPC > CAT-1 Mock 1 > Question N | Timer | End Test)
   ========================================================================== */
.sd-exam-topbar,
.lc-top-navbar {
  height: 52px;
  min-height: 52px;
  max-height: 52px;
  background: #070a11;
  border-bottom: 1px solid #172236;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  box-sizing: border-box;
  z-index: 100;
  flex-shrink: 0;
  user-select: none;
}

.sd-topbar-left {
  display: flex;
  align-items: center;
  gap: 18px;
  min-width: 0;
}

.sd-brand-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
}

.sd-brand-name {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.sd-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #64748b;
  white-space: nowrap;
  min-width: 0;
  overflow: hidden;
}

.sd-bc-sep {
  color: #475569;
  font-size: 12.5px;
  font-weight: 400;
  user-select: none;
  flex-shrink: 0;
}

.sd-bc-item {
  color: #64748b;
  white-space: nowrap;
  flex-shrink: 0;
}

.sd-bc-item.is-active {
  color: #cbd5e1;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex-shrink: 1;
}

.sd-topbar-center {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
}

.sd-topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}

.sd-timer-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 5px 14px 5px 12px;
  background: #0d1322;
  border: 1px solid #1c273e;
  border-radius: 20px;
  user-select: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
  transition: all 0.2s ease;
}

.sd-timer-clock-icon {
  color: #60a5fa;
  flex-shrink: 0;
  display: flex;
}

.sd-timer-text-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.sd-timer-digits {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
  font-size: 15.5px;
  font-weight: 700;
  color: #f8fafc;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.sd-timer-sub {
  font-size: 9.5px;
  font-weight: 600;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 1px;
}

.sd-timer-badge.is-warning {
  border-color: rgba(245, 158, 11, 0.4);
  background: rgba(245, 158, 11, 0.08);
}

.sd-timer-badge.is-warning .sd-timer-clock-icon,
.sd-timer-badge.is-warning .sd-timer-digits {
  color: #fbbf24;
}

.sd-timer-badge.is-danger {
  border-color: rgba(239, 68, 68, 0.45);
  background: rgba(239, 68, 68, 0.1);
}

.sd-timer-badge.is-danger .sd-timer-clock-icon,
.sd-timer-badge.is-danger .sd-timer-digits {
  color: #f87171;
}

.sd-timer-badge.is-paused .sd-timer-digits {
  color: #94a3b8;
}

.lc-timer-pause-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #94a3b8;
  cursor: pointer;
  padding: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  margin-left: 2px;
  transition: all 0.15s ease;
}

.lc-timer-pause-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

.sd-topbar-right .header-bookmarks-btn {
  width: 32px;
  height: 32px;
  min-width: 32px;
  min-height: 32px;
  background: #0d1322;
  border: 1px solid #1c273e;
  border-radius: 8px;
  color: #94a3b8;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: all 0.15s ease;
  padding: 0;
}

.sd-topbar-right .header-bookmarks-btn:hover {
  background: #141d33;
  border-color: #38bdf8;
  color: #f1f5f9;
}

.sd-topbar-right .header-bookmarks-count {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 999px;
  background-color: #38bdf8;
  color: #070a11;
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: 10px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  border: 1.5px solid #070a11;
}

.sd-btn-fullscreen {
  background: #111726;
  border: 1px solid #1f293d;
  color: #94a3b8;
  border-radius: 8px;
  padding: 6px 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1;
}

.sd-btn-fullscreen:hover {
  background: #1e293b;
  border-color: #38bdf8;
  color: #f8fafc;
}

.sd-btn-fullscreen.is-fullscreen {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.4);
  color: #38bdf8;
}

.sd-btn-end-test {
  background: #250d13;
  border: 1px solid #5c1922;
  color: #f87171;
  border-radius: 8px;
  padding: 6px 18px;
  font-weight: 500;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.sd-btn-end-test:hover {
  background: #3d141d;
  border-color: #ef4444;
  color: #ffffff;
}

/* ==========================================================================
   3-Panel Card Frame Layout (Sidebar Card | Problem Card | Editor & Test Card)
   ========================================================================== */
.sd-exam-layout {
  display: flex !important;
  flex-direction: row !important;
  width: 100vw !important;
  height: calc(100vh - 52px) !important;
  max-height: calc(100vh - 52px) !important;
  padding: 12px 16px 16px 16px !important;
  gap: 0 !important;
  box-sizing: border-box !important;
  background: #070a11 !important;
  overflow: hidden !important;
}

/* --- Panel 1: Left Question Navigator Card --- */
.sd-exam-sidebar {
  width: 260px !important;
  min-width: 260px !important;
  max-width: 260px !important;
  height: 100% !important;
  background: #0d121e !important;
  border: 1px solid #172236 !important;
  border-radius: 12px !important;
  display: flex !important;
  flex-direction: column !important;
  padding: 20px 16px 14px 16px !important;
  box-sizing: border-box !important;
  flex-shrink: 0 !important;
  overflow: hidden !important;
}

.sd-sidebar-header {
  margin-bottom: 10px;
}

.sd-sidebar-title {
  font-size: 15px;
  font-weight: 700;
  color: #f1f5f9;
  margin: 0;
  line-height: 1.3;
}

.sd-sidebar-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: #64748b;
  margin: 5px 0 14px 0;
}

.sd-meta-bullet {
  font-size: 8px;
  color: #475569;
}

.sd-progress-track {
  height: 4px;
  background: #192336;
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 7px;
}

.sd-progress-fill {
  height: 100%;
  background: #3b82f6;
  border-radius: 2px;
  transition: width 0.3s ease;
}

.sd-progress-label {
  font-size: 11.5px;
  color: #94a3b8;
  font-weight: 500;
}

.sd-question-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-right: 2px;
  margin: 12px 0;
  scrollbar-width: thin;
  scrollbar-color: #1e2638 transparent;
}

.sd-question-list::-webkit-scrollbar {
  width: 4px;
}

.sd-question-list::-webkit-scrollbar-thumb {
  background: #1e2638;
  border-radius: 2px;
}

.sd-q-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1.5px solid transparent;
  cursor: pointer;
  background: transparent;
  transition: all 0.15s ease;
  user-select: none;
}

.sd-q-item:hover {
  background: rgba(255, 255, 255, 0.03);
}

.sd-q-item.is-current {
  background: rgba(59, 130, 246, 0.08) !important;
  border-color: #3b82f6 !important;
}

.sd-q-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #151d2c;
  border: 1px solid #233148;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: #94a3b8;
  flex-shrink: 0;
  transition: all 0.15s ease;
}

.sd-q-avatar.is-active-avatar {
  background: #3b82f6 !important;
  border-color: #3b82f6 !important;
  color: #ffffff !important;
}

.sd-q-info {
  flex: 1;
  margin: 0 12px;
  min-width: 0;
}

.sd-q-name {
  font-size: 13px;
  font-weight: 500;
  color: #f1f5f9;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.4;
}

.sd-status-check {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #10b981;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sd-status-attempted {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid #f59e0b;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-sizing: border-box;
}

.sd-attempted-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #f59e0b;
  display: block;
}

.sd-status-circle {
  width: 17px;
  height: 17px;
  border-radius: 50%;
  border: 1.5px solid #334155;
  box-sizing: border-box;
  flex-shrink: 0;
}

.sd-status-circle.is-current-ring {
  border-color: #3b82f6 !important;
}

.sd-q-flag-icon {
  color: #f59e0b;
  margin-left: 4px;
  display: inline-flex;
  align-items: center;
  vertical-align: middle;
}

.sd-sidebar-legend {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid #172236;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  color: #64748b;
  flex-wrap: wrap;
  gap: 6px;
}

.sd-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sd-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  display: inline-block;
}

.sd-dot.dot-answered {
  background: #10b981;
}

.sd-dot.dot-attempted {
  background: #f59e0b;
}

.sd-dot.dot-current {
  background: #3b82f6;
}

.sd-dot.dot-unanswered {
  border: 1.5px solid #475569;
  background: transparent;
  box-sizing: border-box;
}

/* ==========================================================================
   Panel 2 & 3: Workspace Container & Split Question Card
   ========================================================================== */
.sd-exam-workspace {
  flex: 1 !important;
  height: 100% !important;
  min-width: 0 !important;
  position: relative !important;
  overflow: hidden !important;
}

/* Individual Question Item: Split Layout Grid */
.exam-question-item {
  display: none !important;
}

.exam-question-item.is-active,
.lc-split-layout.is-active {
  display: grid !important;
  grid-template-columns: minmax(280px, 1fr) 14px minmax(360px, 1.25fr);
  width: 100% !important;
  height: 100% !important;
  min-width: 0 !important;
  gap: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  box-sizing: border-box !important;
  background: transparent !important;
  overflow: hidden !important;
  transition: grid-template-columns 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

.exam-question-item:not(.is-active) {
  display: none !important;
}

.exam-question-item.is-active.is-editor-maximized,
.lc-split-layout.is-active.is-editor-maximized {
  display: flex !important;
  grid-template-columns: 1fr !important;
  width: 100% !important;
}

.exam-question-item.is-editor-maximized .lc-pane-left,
.lc-split-layout.is-editor-maximized .lc-pane-left {
  display: none !important;
  opacity: 0 !important;
  width: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  border: none !important;
  pointer-events: none !important;
}

.exam-question-item.is-editor-maximized .lc-split-resizer,
.lc-split-layout.is-editor-maximized .lc-split-resizer {
  display: none !important;
  opacity: 0 !important;
  width: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  pointer-events: none !important;
}

.exam-question-item.is-editor-maximized .lc-pane-right,
.lc-split-layout.is-editor-maximized .lc-pane-right {
  width: 100% !important;
  flex: 1 1 100% !important;
  min-width: 0 !important;
}

body.is-resizing-panels .lc-split-layout,
body.is-resizing-panels .lc-pane-left,
body.is-resizing-panels .lc-pane-right,
body.is-resizing-panels .lc-split-resizer {
  transition: none !important;
}

/* --- Panel 2: Middle Problem Statement Card --- */
.sd-problem-pane,
.lc-pane-left {
  background: #0d121e !important;
  border: 1px solid #172236 !important;
  border-radius: 12px !important;
  height: 100% !important;
  max-height: 100% !important;
  overflow-y: auto !important;
  padding: 24px 28px !important;
  color: #94a3b8 !important;
  font-size: 13.5px !important;
  line-height: 1.7 !important;
  display: flex !important;
  flex-direction: column !important;
  min-width: 0 !important;
  box-sizing: border-box !important;
  scrollbar-width: thin;
  scrollbar-color: #1e2638 transparent;
  transition: opacity 0.25s ease, padding 0.3s ease, border-color 0.2s ease;
}

.sd-problem-pane::-webkit-scrollbar {
  width: 6px;
}

.sd-problem-pane::-webkit-scrollbar-thumb {
  background: #1e2638;
  border-radius: 3px;
}

.sd-problem-pane::-webkit-scrollbar-thumb:hover {
  background: #2d3b55;
}

.sd-problem-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.sd-problem-meta-left {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.sd-question-num-tag {
  font-size: 13.5px;
  font-weight: 700;
  color: #94a3b8;
  letter-spacing: 0.01em;
  font-family: inherit;
  user-select: none;
}

.sd-diff-pill {
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 6px;
  display: inline-block;
}

.sd-diff-pill.diff-easy {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.sd-diff-pill.diff-medium {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
}

.sd-diff-pill.diff-hard {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

.sd-btn-bookmark {
  background: transparent;
  border: none;
  color: #64748b;
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.sd-btn-bookmark:hover {
  color: #f1f5f9;
}

.sd-btn-bookmark.is-flagged,
.sd-btn-bookmark.is-bookmarked {
  color: #38bdf8;
}

.sd-btn-bookmark.is-flagged .sd-bookmark-icon,
.sd-btn-bookmark.is-bookmarked .sd-bookmark-icon {
  fill: currentColor;
}

.sd-problem-title {
  font-size: 22px;
  font-weight: 700;
  color: #f1f5f9;
  margin: 0 0 16px 0;
  line-height: 1.3;
}

.sd-problem-body {
  flex: 1;
}

.sd-problem-body p {
  margin: 0 0 12px 0;
  color: #94a3b8;
}

.sd-problem-body h3,
.sd-problem-body h4 {
  font-size: 15px;
  font-weight: 700;
  color: #f1f5f9;
  margin: 20px 0 8px 0;
}

.sd-problem-body ul,
.sd-problem-body ol {
  margin: 0 0 16px 0;
  padding-left: 20px;
  color: #94a3b8;
}

.sd-problem-body li {
  margin-bottom: 6px;
}

.sd-problem-body code,
.sd-problem-pane code,
.lc-pane-left code,
[data-theme="dark"] .sd-problem-body code,
[data-theme="dark"] .sd-problem-pane code,
[data-theme="dark"] .lc-pane-left code,
body.is-exam-mode :not(pre)>code {
  background: rgba(255, 255, 255, 0.06) !important;
  color: #cbd5e1 !important;
  border: 1px solid rgba(255, 255, 255, 0.09) !important;
  padding: 1px 5px !important;
  border-radius: 4px !important;
  font-family: 'Cascadia Code', 'Fira Code', Consolas, 'Courier New', monospace !important;
  font-size: 12px !important;
  font-weight: 500 !important;
}

.sd-problem-body pre {
  background: #060910;
  border: 1px solid #141c2c;
  border-radius: 8px;
  padding: 12px 14px;
  overflow-x: auto;
  margin: 8px 0 16px 0;
  color: #e2e8f0;
  font-family: var(--font-mono, monospace);
  font-size: 13px;
  line-height: 1.5;
}

/* Example Cards Matching Reference Assessment UI */
.sd-example-card {
  background: #0a0e18;
  border: 1px solid #151d2d;
  border-radius: 10px;
  padding: 16px 18px;
  margin: 20px 0;
}

.sd-ex-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.sd-ex-title {
  font-size: 13.5px;
  font-weight: 700;
  color: #f1f5f9;
}

.sd-btn-copy-ex {
  background: transparent;
  border: none;
  color: #64748b;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  padding: 3px 6px;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.sd-btn-copy-ex:hover {
  color: #e2e8f0;
  background: rgba(255, 255, 255, 0.05);
}

.sd-ex-section {
  margin-bottom: 12px;
}

.sd-ex-section:last-child {
  margin-bottom: 0;
}

.sd-ex-label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: #64748b;
  margin-bottom: 6px;
}

.sd-ex-box {
  background: #060910;
  border: 1px solid #121826;
  border-radius: 8px;
  padding: 12px 14px;
  color: #e2e8f0;
  font-family: var(--font-mono, monospace);
  font-size: 13px;
  line-height: 1.5;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Solution Box */
.sd-solution-box {
  margin-top: 22px;
  border-top: 1px solid #172236;
  padding-top: 16px;
}

.sd-solution-box summary {
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: #64748b;
  user-select: none;
}

.sd-solution-box.is-locked summary {
  color: #475569;
}

.sol-locked-text {
  color: #64748b;
}

.sol-reveal-link {
  background: transparent;
  border: 1px solid #243048;
  color: #3b82f6;
  border-radius: 4px;
  font-size: 11.5px;
  padding: 3px 8px;
  cursor: pointer;
  margin-left: 8px;
}

/* --- Splitter Dividers (Sidebar Resizer & Problem-Editor Resizer) --- */
.sd-sidebar-resizer,
.lc-split-resizer {
  width: 14px !important;
  min-width: 14px !important;
  height: 100% !important;
  cursor: col-resize !important;
  background: transparent !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  z-index: 10 !important;
  user-select: none !important;
  flex-shrink: 0 !important;
  transition: background 0.15s ease;
}

.sd-sidebar-resizer:hover,
.sd-sidebar-resizer.is-dragging,
.lc-split-resizer:hover,
.lc-split-resizer.is-dragging {
  background: rgba(59, 130, 246, 0.08) !important;
}

.sd-sidebar-resizer .lc-resizer-handle,
.lc-split-resizer .lc-resizer-handle {
  width: 3px !important;
  height: 36px !important;
  background: #192336 !important;
  border-radius: 2px !important;
  transition: all 0.15s ease !important;
}

.sd-sidebar-resizer:hover .lc-resizer-handle,
.sd-sidebar-resizer.is-dragging .lc-resizer-handle,
.lc-split-resizer:hover .lc-resizer-handle,
.lc-split-resizer.is-dragging .lc-resizer-handle {
  background: #3b82f6 !important;
  height: 52px !important;
}

body.is-resizing-panels {
  cursor: col-resize !important;
  user-select: none !important;
}

body.is-resizing-panels * {
  cursor: col-resize !important;
  user-select: none !important;
  pointer-events: none !important;
}

body.is-resizing-panels .sd-exam-layout,
body.is-resizing-panels .sd-sidebar-resizer,
body.is-resizing-panels .lc-split-resizer {
  pointer-events: auto !important;
}

/* ==========================================================================
   Panel 3: Right Code Workspace & Test Console Card
   ========================================================================== */
.sd-editor-pane,
.lc-pane-right {
  background: #060910 !important;
  border: 1px solid #172236 !important;
  border-radius: 12px !important;
  height: 100% !important;
  max-height: 100% !important;
  display: flex !important;
  flex-direction: column !important;
  overflow: hidden !important;
  min-width: 0 !important;
  box-sizing: border-box !important;
}

/* ==========================================================================
   Code Workspace Outer Shell (StudyDump UI) + Inner VS Code Code Runner
   ========================================================================== */
.exam-runner-mount,
.sd-code-workspace,
.lc-code-workspace {
  height: 100% !important;
  max-height: 100% !important;
  width: 100% !important;
  display: flex !important;
  flex-direction: column !important;
  overflow: hidden !important;
  flex: 1 1 0% !important;
  min-height: 0 !important;
  background: #060910 !important;
  color: #cccccc;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* StudyDump Editor Topbar */
.sd-editor-topbar {
  height: 33px !important;
  min-height: 33px !important;
  background: #0a0e18 !important;
  border-bottom: 1px solid #172236 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  padding: 0 10px !important;
  box-sizing: border-box !important;
  user-select: none !important;
}

.sd-editor-topbar-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sd-lang-select-pill {
  display: inline-flex;
  align-items: center;
  height: 22px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  padding: 0 8px;
  font-size: 11px;
  font-weight: 500;
  color: #94a3b8;
  cursor: default;
  letter-spacing: 0.01em;
}

.sd-editor-topbar-right {
  display: flex;
  align-items: center;
  gap: 5px;
}

.sd-editor-icon-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #94a3b8;
  cursor: pointer;
  width: 24px;
  height: 22px;
  padding: 0;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.12s ease;
}

.sd-editor-icon-btn:hover {
  color: #f1f5f9;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.16);
}

.sd-btn-run,
.lc-btn-run {
  background: #2563eb !important;
  border: 1px solid #3b82f6 !important;
  color: #ffffff !important;
  border-radius: 4px !important;
  font-weight: 600 !important;
  font-size: 11px !important;
  height: 22px !important;
  padding: 0 10px !important;
  cursor: pointer !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 4px !important;
  transition: background 0.12s ease !important;
}

.sd-btn-run:hover,
.lc-btn-run:hover {
  background: #1d4ed8 !important;
}

.sd-btn-submit,
.lc-btn-submit {
  background: #059669 !important;
  border: 1px solid #10b981 !important;
  color: #ffffff !important;
  border-radius: 4px !important;
  font-weight: 600 !important;
  font-size: 11px !important;
  height: 22px !important;
  padding: 0 10px !important;
  cursor: pointer !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 4px !important;
  transition: background 0.12s ease !important;
}

.sd-btn-submit:hover,
.lc-btn-submit:hover {
  background: #047857 !important;
}

/* VS Code Editor Viewport & Surface */
.vs-editor-viewport,
.sd-editor-wrap,
.lc-editor-wrap {
  flex: 1 1 0% !important;
  min-height: 80px !important;
  height: auto !important;
  display: flex !important;
  overflow: hidden !important;
  background: #1e1e1e !important;
  position: relative !important;
}

.vs-gutter,
.sd-line-gutter,
.lc-line-gutter {
  width: 50px !important;
  min-width: 50px !important;
  padding: 10px 0 !important;
  text-align: right !important;
  color: #858585 !important;
  font-family: Consolas, 'Cascadia Code', 'Fira Code', 'Courier New', monospace !important;
  font-size: 13px !important;
  line-height: 20px !important;
  font-feature-settings: "liga" 0, "calt" 0 !important;
  font-variant-ligatures: none !important;
  -webkit-font-smoothing: antialiased !important;
  -moz-osx-font-smoothing: grayscale !important;
  text-rendering: geometricPrecision !important;
  user-select: none !important;
  background: #1e1e1e !important;
  border-right: 1px solid #282828 !important;
  box-sizing: border-box !important;
  overflow: hidden !important;
}

.vs-gutter-cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 10px;
  height: 20px !important;
  min-height: 20px !important;
  max-height: 20px !important;
  line-height: 20px !important;
  font-size: 13px !important;
  box-sizing: border-box !important;
}

.vs-gutter-cell.is-active {
  color: #c6c6c6 !important;
  font-weight: 600;
}

.vs-bp-dot {
  position: absolute;
  left: 7px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #e51400;
  opacity: 0;
  transition: opacity 0.1s ease;
}

.vs-gutter-cell:hover .vs-bp-dot {
  opacity: 0.65;
}

.vs-surface-wrap {
  position: relative;
  flex: 1 1 0%;
  height: 100%;
  overflow: hidden;
  background: #1e1e1e;
}

.vs-active-line-bg {
  position: absolute;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.035);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  pointer-events: none;
  z-index: 1;
}

.vs-highlight-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  margin: 0 !important;
  padding: 10px 16px !important;
  font-family: Consolas, 'Cascadia Code', 'Fira Code', 'Courier New', monospace !important;
  font-size: 13px !important;
  line-height: 20px !important;
  font-feature-settings: "liga" 0, "calt" 0 !important;
  font-variant-ligatures: none !important;
  -webkit-font-smoothing: antialiased !important;
  -moz-osx-font-smoothing: grayscale !important;
  text-rendering: geometricPrecision !important;
  letter-spacing: normal !important;
  word-spacing: normal !important;
  tab-size: 4 !important;
  -moz-tab-size: 4 !important;
  white-space: pre !important;
  overflow: hidden !important;
  z-index: 2;
  box-sizing: border-box !important;
  color: #d4d4d4;
  border: none !important;
}

.vs-code-content {
  display: block !important;
  margin: 0 !important;
  padding: 0 !important;
  border: none !important;
  background: transparent !important;
  font-family: inherit !important;
  font-size: inherit !important;
  line-height: inherit !important;
  letter-spacing: inherit !important;
  word-spacing: inherit !important;
  white-space: pre !important;
  tab-size: 4 !important;
  -moz-tab-size: 4 !important;
}

.vs-code-line {
  display: inline;
}

.vs-textarea,
.sd-code-editor,
.lc-code-editor {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  background: transparent !important;
  color: transparent !important;
  caret-color: #aeafad !important;
  margin: 0 !important;
  padding: 10px 16px !important;
  font-family: Consolas, 'Cascadia Code', 'Fira Code', 'Courier New', monospace !important;
  font-size: 13px !important;
  line-height: 20px !important;
  font-feature-settings: "liga" 0, "calt" 0 !important;
  font-variant-ligatures: none !important;
  -webkit-font-smoothing: antialiased !important;
  -moz-osx-font-smoothing: grayscale !important;
  text-rendering: geometricPrecision !important;
  letter-spacing: normal !important;
  word-spacing: normal !important;
  tab-size: 4 !important;
  -moz-tab-size: 4 !important;
  white-space: pre !important;
  border: none !important;
  outline: none !important;
  box-shadow: none !important;
  resize: none !important;
  overflow: auto !important;
  z-index: 3;
  box-sizing: border-box !important;
  scrollbar-width: thin;
  scrollbar-color: #424242 transparent;
}

.vs-textarea::selection {
  background: #264f78 !important;
  color: transparent !important;
}

.vs-textarea::-moz-selection {
  background: #264f78 !important;
  color: transparent !important;
}

/* VS Code Dark+ Syntax Highlighting Colors */
.vs-token-comment {
  color: #6a9955 !important;
  font-style: italic;
}

.vs-token-preproc {
  color: #c586c0 !important;
  font-weight: 500;
}

.vs-token-string {
  color: #ce9178 !important;
}

.vs-token-escape {
  color: #d7ba7d !important;
  font-weight: 600;
}

.vs-token-control {
  color: #c586c0 !important;
  font-weight: 500;
}

.vs-token-type {
  color: #4ec9b0 !important;
  font-weight: 500;
}

.vs-token-keyword {
  color: #569cd6 !important;
  font-weight: 500;
}

.vs-token-constant {
  color: #569cd6 !important;
}

.vs-token-function {
  color: #dcdcaa !important;
}

.vs-token-variable {
  color: #9cdcfe !important;
}

.vs-token-number {
  color: #b5cea8 !important;
}

.vs-token-operator {
  color: #d4d4d4 !important;
}

/* Bracket Pair Colorization */
.vs-bracket-0 {
  color: #ffd700 !important;
}

.vs-bracket-1 {
  color: #da70d6 !important;
}

.vs-bracket-2 {
  color: #179fff !important;
}

/* Indent Guides */
.vs-indent-guide {
  position: relative;
  background-image: linear-gradient(to right, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 100% 100%;
}

/* VS Code IntelliSense Dropdown Menu */
.vs-intellisense-popup {
  position: absolute;
  z-index: 1000;
  background: #252526;
  border: 1px solid #454545;
  border-radius: 4px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.55);
  display: flex;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 12px;
  max-height: 220px;
  overflow: hidden;
  animation: vsFadeIn 0.1s ease;
}

@keyframes vsFadeIn {
  from {
    opacity: 0;
    transform: translateY(-3px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.vs-suggest-list {
  width: 250px;
  max-height: 215px;
  overflow-y: auto;
  padding: 3px 0;
  background: #252526;
  scrollbar-width: thin;
  scrollbar-color: #424242 transparent;
}

.vs-suggest-item {
  height: 24px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 8px;
  cursor: pointer;
  color: #cccccc;
  user-select: none;
  transition: background 0.08s ease;
}

.vs-suggest-item.is-selected {
  background: #04395e !important;
  color: #ffffff !important;
}

.vs-suggest-item:hover:not(.is-selected) {
  background: #2a2d2e;
}

.vs-suggest-label {
  font-family: Consolas, monospace;
  font-size: 12px;
  color: inherit;
}

.vs-suggest-match {
  color: #ffeb3b !important;
  font-weight: 700;
}

.vs-suggest-detail {
  margin-left: auto;
  color: #858585;
  font-size: 11px;
  font-style: italic;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 95px;
}

.vs-kind-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 2px;
  font-size: 9.5px;
  font-weight: 700;
  flex-shrink: 0;
  font-family: Consolas, monospace;
}

.vs-kind-fn {
  background: #b180d7;
  color: #ffffff;
}

.vs-kind-kw {
  background: #569cd6;
  color: #ffffff;
}

.vs-kind-type {
  background: #4ec9b0;
  color: #1e1e1e;
}

.vs-kind-var {
  background: #75beff;
  color: #1e1e1e;
}

.vs-kind-snip {
  background: #89d185;
  color: #1e1e1e;
}

.vs-kind-prep {
  background: #e5c07b;
  color: #1e1e1e;
}

.vs-suggest-doc {
  width: 250px;
  background: #202020;
  border-left: 1px solid #333333;
  padding: 10px 12px;
  font-size: 12px;
  color: #cccccc;
  overflow-y: auto;
  box-sizing: border-box;
}

.vs-doc-signature {
  font-family: Consolas, monospace;
  color: #dcdcaa;
  font-size: 11.5px;
  border-bottom: 1px solid #2d2d2d;
  padding-bottom: 5px;
  margin-bottom: 6px;
  word-break: break-word;
}

.vs-doc-body {
  line-height: 16px;
  color: #969696;
  font-size: 11.5px;
}

/* VS Code Minimap Track */
.vs-minimap-track {
  width: 32px;
  background: #1e1e1e;
  border-left: 1px solid #252526;
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
}

.vs-minimap-slider {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 40px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

/* StudyDump Editor Status Bar */
.vs-statusbar,
.sd-editor-statusbar,
.lc-editor-statusbar {
  height: 24px !important;
  min-height: 24px !important;
  background: #0a0e18 !important;
  border-top: 1px solid #172236 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  padding: 0 12px !important;
  font-size: 11px !important;
  color: #64748b !important;
  font-family: Consolas, monospace !important;
  user-select: none !important;
}

.vs-sb-left,
.lc-status-left {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 100%;
}

.lc-save-indicator {
  color: #10b981;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.vs-sb-right,
.lc-status-right {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 100%;
}

.lc-cursor-pos {
  color: #94a3b8;
}

/* Console Vertical Resizer */
.sd-console-resizer,
.vs-panel-resizer {
  height: 8px !important;
  min-height: 8px !important;
  width: 100% !important;
  cursor: row-resize !important;
  background: #060910 !important;
  border-top: 1px solid #172236 !important;
  border-bottom: 1px solid #172236 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  z-index: 10 !important;
  user-select: none !important;
  flex-shrink: 0 !important;
  transition: background 0.15s ease;
}

.sd-console-resizer:hover,
.sd-console-resizer.is-dragging {
  background: rgba(59, 130, 246, 0.1) !important;
}

.sd-console-resizer-handle {
  width: 32px !important;
  height: 2px !important;
  background: #1e293b !important;
  border-radius: 2px !important;
  transition: all 0.15s ease !important;
}

.sd-console-resizer:hover .sd-console-resizer-handle,
.sd-console-resizer.is-dragging .sd-console-resizer-handle {
  background: #3b82f6 !important;
  width: 48px !important;
}

body.is-resizing-v-panels {
  cursor: row-resize !important;
  user-select: none !important;
}

body.is-resizing-v-panels * {
  cursor: row-resize !important;
  user-select: none !important;
  pointer-events: none !important;
}

body.is-resizing-v-panels .sd-console-resizer {
  pointer-events: auto !important;
}

body.is-resizing-panels {
  cursor: col-resize !important;
  user-select: none !important;
}

body.is-resizing-panels * {
  cursor: col-resize !important;
  user-select: none !important;
  pointer-events: none !important;
}

body.is-resizing-panels .lc-split-resizer,
body.is-resizing-panels .sd-sidebar-resizer {
  pointer-events: auto !important;
}

/* StudyDump Testcase & Console Panel */
.sd-console-panel,
.lc-console-panel,
.vs-console-panel {
  flex: 0 0 auto !important;
  flex-shrink: 0 !important;
  height: 280px;
  min-height: 90px !important;
  max-height: none !important;
  background: #080b12 !important;
  display: flex !important;
  flex-direction: column !important;
  overflow: hidden !important;
}

.sd-console-tabs-bar,
.lc-console-header,
.vs-terminal-tabs {
  height: 30px !important;
  min-height: 30px !important;
  flex-shrink: 0 !important;
  background: #0a0e18 !important;
  border-bottom: 1px solid #172236 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  padding: 0 10px !important;
  box-sizing: border-box !important;
}

.sd-console-tabs-left,
.lc-console-tabs,
.vs-terminal-tabs-left {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 100%;
}

.sd-console-tab,
.lc-console-tab,
.vs-tab-btn {
  background: transparent;
  border: none;
  color: #64748b;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 0 8px;
  height: 100%;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  border-bottom: 2px solid transparent;
  transition: all 0.12s ease;
}

.sd-console-tab:hover,
.lc-console-tab:hover,
.vs-tab-btn:hover {
  color: #cbd5e1;
}

.sd-console-tab.is-active,
.lc-console-tab.is-active,
.vs-tab-btn.is-active {
  color: #3b82f6 !important;
  border-bottom-color: #3b82f6 !important;
  font-weight: 600 !important;
}

.sd-console-tab-label {
  font-size: 11px;
  color: #64748b;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sd-tc-count-badge {
  font-size: 11px;
  margin-left: 2px;
  font-weight: 500;
  color: #94a3b8;
}

.sd-tc-badge-pill {
  font-size: 10.5px;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

.sd-tc-badge-pill.is-all-passed,
.sd-tc-summary-pill.is-all-passed {
  background: rgba(34, 197, 94, 0.15);
  color: #4ade80;
  border: 1px solid rgba(34, 197, 94, 0.35);
}

.sd-tc-badge-pill.is-partial-passed,
.sd-tc-summary-pill.is-partial-passed {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.sd-tc-summary-pill {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  letter-spacing: 0.02em;
}

.sd-console-content,
.lc-console-body,
.vs-terminal-body {
  flex: 1 1 0% !important;
  min-height: 0 !important;
  height: calc(100% - 30px) !important;
  overflow: hidden !important;
  display: flex !important;
  flex-direction: column !important;
  background: #080b12 !important;
}

.sd-cview {
  display: none !important;
  flex: 1 1 0% !important;
  min-height: 0 !important;
  height: 100% !important;
  overflow: hidden !important;
  flex-direction: column !important;
}

.sd-cview.is-active {
  display: flex !important;
}

.sd-testcase-rows-list,
.vs-testcase-list {
  flex: 1 1 0% !important;
  min-height: 0 !important;
  height: 100% !important;
  max-height: 100% !important;
  overflow-y: auto !important;
  overflow-x: hidden !important;
  overscroll-behavior: contain !important;
  -webkit-overflow-scrolling: touch !important;
  touch-action: pan-y !important;
  padding: 10px 14px 16px 14px !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 8px !important;
  background: #080b12 !important;
  scrollbar-width: thin;
  scrollbar-color: #2a374e #080b12;
}

.sd-testcase-rows-list::-webkit-scrollbar,
.vs-testcase-list::-webkit-scrollbar {
  width: 6px;
}

.sd-testcase-rows-list::-webkit-scrollbar-track,
.vs-testcase-list::-webkit-scrollbar-track {
  background: #080b12;
}

.sd-testcase-rows-list::-webkit-scrollbar-thumb,
.vs-testcase-list::-webkit-scrollbar-thumb {
  background: #1f2a40;
  border-radius: 4px;
}

.sd-testcase-rows-list::-webkit-scrollbar-thumb:hover,
.vs-testcase-list::-webkit-scrollbar-thumb:hover {
  background: #3b82f6;
}

.sd-testcase-card,
.vs-tc-card {
  background: #0d121e;
  border: 1px solid #172236;
  border-radius: 6px;
  overflow: visible;
  flex-shrink: 0;
  transition: border-color 0.12s;
}

.sd-testcase-card:hover,
.vs-tc-card:hover {
  border-color: #243048;
}

.sd-tc-header,
.vs-tc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  cursor: pointer;
  user-select: none;
  border-radius: 6px 6px 0 0;
}

.sd-tc-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sd-tc-arrow,
.vs-tc-arrow {
  color: #858585;
  transition: transform 0.15s ease;
  flex-shrink: 0;
}

.sd-tc-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sd-tc-name,
.vs-tc-name {
  font-size: 12.5px;
  font-weight: 600;
  color: #e0e0e0;
}

.sd-tc-desc,
.vs-tc-desc {
  font-size: 11.5px;
  color: #858585;
}

.sd-tc-status-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sd-tc-badge,
.vs-tc-badge {
  font-size: 11.5px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.sd-tc-badge.badge-passed {
  background: rgba(16, 185, 129, 0.15) !important;
  border: 1px solid rgba(16, 185, 129, 0.35) !important;
  color: #34d399 !important;
}

.sd-tc-badge.badge-failed {
  background: rgba(239, 68, 68, 0.15) !important;
  border: 1px solid rgba(239, 68, 68, 0.35) !important;
  color: #f87171 !important;
}

.sd-tc-badge.badge-pending {
  background: #252526;
  border: 1px solid #3c3c3c;
  color: #969696;
}

.sd-tc-time,
.vs-tc-time {
  font-family: Consolas, monospace;
  font-size: 11.5px;
  color: #858585;
}

.sd-tc-details,
.vs-tc-details {
  padding: 10px 14px 12px 14px;
  border-top: 1px solid #172236;
  background: #080b12;
  display: none;
  flex-direction: column;
  gap: 8px;
  border-radius: 0 0 6px 6px;
}

.sd-testcase-card.is-open .sd-tc-details,
.vs-tc-card.is-open .vs-tc-details {
  display: flex !important;
}

.sd-testcase-card.is-open .sd-tc-arrow,
.vs-tc-card.is-open .vs-tc-arrow {
  transform: rotate(90deg);
}

.sd-field-title,
.vs-field-title {
  font-size: 11px;
  font-weight: 600;
  color: #858585;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 3px;
  display: block;
}

.sd-field-box,
.vs-field-box {
  background: #141a29;
  border: 1px solid #1f2a40;
  border-radius: 4px;
  padding: 6px 10px;
  margin: 0;
  color: #e2e8f0;
  font-family: Consolas, monospace;
  font-size: 12px;
  line-height: 18px;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 140px;
  overflow-y: auto;
  overscroll-behavior: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: #2a374e transparent;
}

.sd-field-box::-webkit-scrollbar,
.vs-field-box::-webkit-scrollbar {
  width: 4px;
}

.sd-field-box::-webkit-scrollbar-thumb,
.vs-field-box::-webkit-scrollbar-thumb {
  background: #1f2a40;
  border-radius: 2px;
}

.vs-actual-box {
  color: #dcdcaa !important;
}

/* Custom Input Box */
.sd-custom-input-box,
.vs-custom-container {
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  flex: 1 1 0% !important;
  min-height: 0 !important;
  height: 100% !important;
  overflow-y: auto !important;
  overscroll-behavior: contain !important;
  -webkit-overflow-scrolling: touch !important;
  touch-action: pan-y !important;
  background: #080b12;
  scrollbar-width: thin;
  scrollbar-color: #2a374e #080b12;
}

.sd-custom-input-box::-webkit-scrollbar,
.vs-custom-container::-webkit-scrollbar {
  width: 6px;
}

.sd-custom-input-box::-webkit-scrollbar-thumb,
.vs-custom-container::-webkit-scrollbar-thumb {
  background: #1f2a40;
  border-radius: 3px;
}

.sd-custom-textarea,
.vs-custom-textarea {
  width: 100%;
  height: 75px;
  min-height: 60px;
  background: #141a29;
  border: 1px solid #1f2a40;
  border-radius: 4px;
  color: #e2e8f0;
  padding: 8px 10px;
  font-family: Consolas, monospace;
  font-size: 12px;
  line-height: 18px;
  resize: vertical !important;
  box-sizing: border-box;
  outline: none;
  overscroll-behavior: auto;
}

.sd-custom-textarea:focus,
.vs-custom-textarea:focus {
  border-color: #3b82f6;
}

/* Compiler & Execution Console View (Authentic Pitch Black Terminal) */
#sd-cview-console,
[id^="sd-cview-console-"] {
  background: #000000 !important;
}

#sd-cview-console.is-active,
[id^="sd-cview-console-"].is-active {
  display: flex !important;
  flex-direction: column !important;
  height: 100% !important;
  min-height: 0 !important;
  flex: 1 1 0% !important;
}

.sd-terminal-box {
  padding: 0 !important;
  margin: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  flex: 1 1 0% !important;
  min-height: 0 !important;
  height: 100% !important;
  overflow: hidden !important;
  background: #000000 !important;
  border: none !important;
}

.sd-terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background: #09090b;
  border-bottom: 1px solid #18181b;
  flex-shrink: 0;
  user-select: none;
}

.sd-terminal-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sd-terminal-dots {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-right: 4px;
}

.sd-terminal-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.sd-terminal-dot.dot-close {
  background: #ef4444;
  opacity: 0.85;
}

.sd-terminal-dot.dot-min {
  background: #f59e0b;
  opacity: 0.85;
}

.sd-terminal-dot.dot-max {
  background: #10b981;
  opacity: 0.85;
}

.sd-terminal-icon {
  color: #22c55e;
  display: flex;
  align-items: center;
}

.sd-terminal-title {
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #a1a1aa;
  text-transform: uppercase;
}

.sd-terminal-badge {
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
  font-size: 9.5px;
  font-weight: 600;
  padding: 1px 6px;
  background: #18181b;
  color: #71717a;
  border: 1px solid #27272a;
  border-radius: 3px;
  letter-spacing: 0.04em;
}

.sd-terminal-clear-btn {
  background: #121215;
  border: 1px solid #27272a;
  border-radius: 4px;
  color: #a1a1aa;
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
  font-size: 10.5px;
  font-weight: 500;
  padding: 2px 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.12s ease;
}

.sd-terminal-clear-btn:hover {
  background: #1c1c22;
  color: #f4f4f5;
  border-color: #3f3f46;
}

.sd-terminal-window {
  flex: 1 1 0% !important;
  min-height: 0 !important;
  height: 100% !important;
  display: flex !important;
  flex-direction: column !important;
  background: #000000 !important;
  overflow: hidden !important;
}

.sd-terminal-output {
  flex: 1 1 0% !important;
  min-height: 0 !important;
  height: 100% !important;
  max-height: none !important;
  margin: 0 !important;
  background: #000000 !important;
  border: none !important;
  border-radius: 0 !important;
  padding: 12px 14px !important;
  color: #e4e4e7 !important;
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, Menlo, Monaco, 'Courier New', monospace !important;
  font-size: 12px !important;
  line-height: 20px !important;
  white-space: pre-wrap !important;
  word-break: break-word !important;
  overflow-y: auto !important;
  overscroll-behavior: contain !important;
  -webkit-overflow-scrolling: touch !important;
  touch-action: pan-y !important;
  box-shadow: none !important;
  scrollbar-width: thin;
  scrollbar-color: #27272a #000000;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.sd-terminal-output::selection {
  background: #27272a;
  color: #ffffff;
}

.sd-terminal-output::-webkit-scrollbar {
  width: 5px;
}

.sd-terminal-output::-webkit-scrollbar-track {
  background: #000000;
}

.sd-terminal-output::-webkit-scrollbar-thumb {
  background: #27272a;
  border-radius: 2px;
}

.sd-terminal-output::-webkit-scrollbar-thumb:hover {
  background: #3f3f46;
}

.sd-terminal-output.is-error {
  color: #fca5a5 !important;
  background: #000000 !important;
}

.sd-console-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #ef4444;
  display: inline-block;
  margin-left: 2px;
  box-shadow: 0 0 6px rgba(239, 68, 68, 0.8);
}

/* ==========================================================================
   Mock Exam Dialogs (End Test Confirmation & Deep Review Analysis Scorecard)
   ========================================================================== */
dialog.exam-dialog {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  max-width: 100vw;
  max-height: 100vh;
  margin: 0;
  padding: 20px 16px;
  background: rgba(4, 7, 14, 0.92) !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  border: none !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  z-index: 10000 !important;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.12s ease;
  box-sizing: border-box;
}

dialog.exam-dialog[open] {
  opacity: 1 !important;
  pointer-events: auto !important;
}

dialog.exam-dialog::backdrop {
  background: transparent !important;
}

.exam-dialog-panel {
  background: #0d121e !important;
  border: 1px solid #1e293b !important;
  border-radius: 16px !important;
  width: 100% !important;
  max-width: 580px;
  max-height: calc(100vh - 40px);
  overflow-y: auto !important;
  display: flex !important;
  flex-direction: column !important;
  box-shadow: 0 25px 65px -10px rgba(0, 0, 0, 0.85), 0 0 0 1px rgba(255, 255, 255, 0.04) !important;
  box-sizing: border-box;
  animation: examModalPopIn 0.16s ease-out forwards;
  will-change: transform, opacity;
  scrollbar-width: thin;
  scrollbar-color: #243048 #0d121e;
}

.exam-dialog-panel.exam-analytics-panel {
  max-width: 840px !important;
}

@keyframes examModalPopIn {
  from {
    transform: scale(0.98) translateY(4px);
    opacity: 0;
  }

  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

.exam-dialog-panel::-webkit-scrollbar {
  width: 6px;
}

.exam-dialog-panel::-webkit-scrollbar-track {
  background: #0d121e;
}

.exam-dialog-panel::-webkit-scrollbar-thumb {
  background: #243048;
  border-radius: 3px;
}

/* Modal Header */
.exam-dialog-header {
  padding: 20px 24px 16px 24px;
  border-bottom: 1px solid #172236;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  background: #0a0f1a;
  border-radius: 16px 16px 0 0;
}

.exam-results-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 6px;
}

.exam-results-tag.badge-success {
  background: rgba(16, 185, 129, 0.14);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.exam-results-tag.badge-warning {
  background: rgba(245, 158, 11, 0.14);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.exam-results-tag.badge-primary {
  background: var(--accent-subtle);
  color: var(--accent);
  border: 1px solid var(--accent-border);
}

.exam-dialog-title {
  font-size: 19px;
  font-weight: 700;
  color: #f8fafc;
  margin: 0 0 2px 0;
  line-height: 1.3;
}

.exam-dialog-subtitle {
  font-size: 12.5px;
  color: #64748b;
  margin: 0;
}

.exam-dialog-close {
  background: #141c2e;
  border: 1px solid #1f2a40;
  color: #94a3b8;
  cursor: pointer;
  padding: 6px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.exam-dialog-close:hover {
  background: #1e293b;
  color: #f1f5f9;
  border-color: #334155;
}

/* Modal Body */
.exam-dialog-body {
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.exam-dialog-desc {
  font-size: 13.5px;
  color: #94a3b8;
  line-height: 1.6;
  margin: 0;
}

/* Stat Grid */
.exam-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.exam-stat-cell {
  background: #080c16;
  border: 1px solid #172236;
  border-radius: 8px;
  padding: 12px 10px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  transition: border-color 0.12s ease;
}

.exam-stat-cell:hover {
  border-color: #243048;
}

.exam-stat-number {
  font-size: 20px;
  font-weight: 700;
  font-family: Consolas, monospace;
  line-height: 1.2;
  color: #f1f5f9;
}

.exam-stat-label {
  font-size: 11px;
  font-weight: 600;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Interactive Question Matrix Grid */
/* Interactive Question Matrix Grid */
.exam-matrix-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.exam-section-label {
  font-size: 11px;
  font-weight: 700;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.exam-matrix-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.exam-matrix-chip {
  background: #080c16;
  border: 1px solid #1e293b;
  border-radius: 8px;
  padding: 6px 14px;
  height: 36px;
  min-width: 60px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
  transform: none !important;
  box-sizing: border-box;
}

.exam-matrix-chip:hover {
  background: #0f172a;
  border-color: var(--accent);
  color: #f8fafc;
}

.exam-matrix-chip .chip-qnum {
  font-size: 12.5px;
  font-weight: 700;
  color: #e2e8f0;
  line-height: 1;
}

.exam-matrix-chip .chip-status-icon {
  font-size: 12px;
  color: #64748b;
  font-weight: 700;
  line-height: 1;
}

.exam-matrix-chip.is-solved {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.35);
}

.exam-matrix-chip.is-solved .chip-qnum,
.exam-matrix-chip.is-solved .chip-status-icon {
  color: #34d399;
}

.exam-matrix-chip.is-attempted {
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.35);
}

.exam-matrix-chip.is-attempted .chip-qnum,
.exam-matrix-chip.is-attempted .chip-status-icon {
  color: #38bdf8;
}

.exam-matrix-chip.is-flagged {
  border-color: rgba(245, 158, 11, 0.45);
  background: rgba(245, 158, 11, 0.1);
}

.exam-matrix-chip.is-flagged .chip-qnum,
.exam-matrix-chip.is-flagged .chip-status-icon {
  color: #fbbf24;
}

@media (max-width: 640px) {
  .exam-matrix-grid {
    gap: 6px;
  }

  .exam-matrix-chip {
    height: 32px;
    min-width: 52px;
    padding: 4px 10px;
    gap: 5px;
  }

  .exam-matrix-chip .chip-qnum {
    font-size: 11.5px;
  }

  .exam-matrix-chip .chip-status-icon {
    font-size: 11px;
  }
}

/* Alerts */
.exam-dialog-alert {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid #1e293b;
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 12.5px;
  color: #94a3b8;
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.5;
}

.exam-dialog-alert svg {
  color: var(--accent);
}

.exam-dialog-alert strong {
  color: #f1f5f9;
}

.exam-dialog-alert.alert-success {
  background: rgba(255, 255, 255, 0.03);
  border-color: #1e293b;
  color: #94a3b8;
}

.exam-dialog-alert.alert-success svg {
  color: var(--accent);
}

/* ==========================================================================
   Analytics Dashboard Elements (Hero Gauge, Mastery Bars, Table Breakdown)
   ========================================================================== */
.exam-hero-analytics {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 16px;
  background: #080c16;
  border: 1px solid #172236;
  border-radius: 14px;
  padding: 18px;
}

.exam-score-gauge-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 10px;
  border-right: 1px solid #172236;
}

.exam-gauge-circle {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle, #0e1626 55%, transparent 70%);
  border: 4px solid #3b82f6;
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.25);
  margin-bottom: 10px;
}

.exam-gauge-circle.gauge-perfect {
  border-color: #10b981;
  box-shadow: 0 0 24px rgba(16, 185, 129, 0.35);
}

.exam-gauge-circle.gauge-warning {
  border-color: #f59e0b;
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.25);
}

.exam-gauge-circle.gauge-danger {
  border-color: #ef4444;
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.25);
}

.exam-gauge-pct {
  font-size: 26px;
  font-weight: 800;
  color: #f8fafc;
  font-family: Consolas, monospace;
  line-height: 1;
}

.exam-gauge-sub {
  font-size: 10px;
  color: #64748b;
  font-weight: 600;
  text-transform: uppercase;
  margin-top: 2px;
}

.exam-gauge-grade {
  font-size: 12px;
  font-weight: 700;
  color: #38bdf8;
}

.exam-hero-metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.exam-metric-item {
  background: #0d121e;
  border: 1px solid #172236;
  border-radius: 10px;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
}

.exam-metric-val {
  font-size: 18px;
  font-weight: 700;
  color: #f1f5f9;
  font-family: Consolas, monospace;
}

.exam-metric-lbl {
  font-size: 11px;
  color: #64748b;
  font-weight: 600;
  text-transform: uppercase;
}

.exam-metric-hint {
  font-size: 11px;
  color: #94a3b8;
}

/* Difficulty Mastery Bars */
.exam-mastery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.exam-mastery-card {
  background: #080c16;
  border: 1px solid #172236;
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.exam-mastery-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
  font-weight: 600;
}

.exam-mastery-bar-wrap {
  height: 5px;
  background: #172236;
  border-radius: 3px;
  overflow: hidden;
}

.exam-mastery-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.4s ease;
}

.exam-mastery-bar-fill.bar-easy {
  background: #10b981;
}

.exam-mastery-bar-fill.bar-medium {
  background: #f59e0b;
}

.exam-mastery-bar-fill.bar-hard {
  background: #ef4444;
}

/* Question-by-Question Deep Analysis Table */
.exam-breakdown-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 280px;
  overflow-y: auto;
  padding-right: 4px;
  scrollbar-width: thin;
  scrollbar-color: #243048 #080c16;
}

.exam-breakdown-row {
  background: #080c16;
  border: 1px solid #172236;
  border-radius: 10px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  transition: all 0.15s ease;
}

.exam-breakdown-row:hover {
  background: #0f172a;
  border-color: #243048;
}

.exam-row-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.exam-row-qnum {
  font-size: 12px;
  font-weight: 700;
  color: #64748b;
  font-family: Consolas, monospace;
  width: 26px;
  flex-shrink: 0;
}

.exam-row-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.exam-row-title {
  font-size: 13px;
  font-weight: 600;
  color: #e2e8f0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.exam-row-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
}

.exam-row-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.exam-row-status-pill {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.exam-row-status-pill.status-solved {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.exam-row-status-pill.status-attempted {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.exam-row-status-pill.status-unanswered {
  background: #172236;
  color: #94a3b8;
  border: 1px solid #243048;
}

.exam-row-jump-btn {
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transform: none !important;
  transition: all 0.12s ease;
}

.exam-row-jump-btn:hover {
  background: var(--accent);
  color: var(--text-inverse, #0d0f12);
  border-color: var(--accent);
  transform: none !important;
}

/* Modal Actions Footer */
.exam-dialog-actions {
  padding: 14px 24px 18px 24px;
  border-top: 1px solid #172236;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  background: #0a0f1a;
  border-radius: 0 0 16px 16px;
}

.exam-btn-subtle {
  background: #141b2a;
  border: 1px solid #1f2a40;
  color: #94a3b8;
  border-radius: 8px;
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transform: none !important;
  transition: all 0.15s ease;
}

.exam-btn-subtle:hover {
  background: #1e293b;
  color: #f1f5f9;
  border-color: #334155;
  transform: none !important;
}

.exam-btn-primary {
  background: var(--accent);
  color: var(--text-inverse, #0d0f12);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 9px 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: none;
  transform: none !important;
  transition: all var(--transition-fast);
}

.exam-btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--text-inverse, #0d0f12);
  box-shadow: none;
  transform: none !important;
}

/* ==========================================================================
   Full-Page Mock Exam Results & Analytics View (#results)
   ========================================================================== */
body.is-results-view #exam-timer-box,
body.is-results-view .sd-topbar-center,
body.is-results-view .sd-timer-badge,
#exam-hud.is-results-view #exam-timer-box,
#exam-hud.is-results-view .sd-topbar-center,
#exam-hud.is-results-view .sd-timer-badge {
  display: none !important;
  visibility: hidden !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

body.is-results-view #article-content {
  display: none !important;
}

.sd-mock-results-view {
  width: 100vw !important;
  max-width: 100vw !important;
  height: calc(100vh - 52px) !important;
  max-height: calc(100vh - 52px) !important;
  margin: 0 !important;
  padding: 0 !important;
  box-sizing: border-box !important;
  display: flex !important;
  flex-direction: column !important;
  overflow-y: auto !important;
  overflow-x: hidden !important;
  overscroll-behavior: contain !important;
  -webkit-overflow-scrolling: touch !important;
  scrollbar-width: thin;
  scrollbar-color: #243048 transparent;
  flex: 1 1 auto;
  min-height: 0;
  pointer-events: auto !important;
  touch-action: pan-y !important;
  background: #070a11 !important;
  animation: fadeIn 0.22s ease forwards;
}

.sd-results-container {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 36px 28px 90px 28px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.sd-mock-results-view::-webkit-scrollbar {
  width: 6px;
}

.sd-mock-results-view::-webkit-scrollbar-track {
  background: transparent;
}

.sd-mock-results-view::-webkit-scrollbar-thumb {
  background: #1f2a40;
  border-radius: 3px;
}

.sd-results-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-bottom: 1px solid #172236;
  padding-bottom: 20px;
}

.sd-results-badge-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.sd-results-badge {
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 11px;
  border-radius: 6px;
  background: #141c2e;
  color: #94a3b8;
  border: 1px solid #23314d;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
  display: inline-flex;
  align-items: center;
  gap: 3px;
  white-space: nowrap;
}

.sd-results-badge-name {
  color: var(--accent, #7ba7d9);
  font-weight: 800;
  text-shadow: 0 0 10px rgba(123, 167, 217, 0.55), 0 0 20px rgba(123, 167, 217, 0.25);
  letter-spacing: 0.04em;
}

.sd-results-meta-pill {
  font-size: 13px;
  color: #94a3b8;
  font-weight: 500;
}

.sd-results-title {
  font-size: 28px;
  font-weight: 800;
  color: #f8fafc;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0;
}

.sd-results-subtitle {
  font-size: 14px;
  color: #94a3b8;
  line-height: 1.5;
  margin: 0;
}

/* Minimalist Score & Metrics Card */
.sd-results-summary-card {
  background: #0d121e;
  border: 1px solid #172236;
  border-radius: 12px;
  padding: 26px 30px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  align-items: center;
}

.sd-score-hero {
  display: flex;
  align-items: center;
  gap: 18px;
  border-right: 1px solid #172236;
  padding-right: 24px;
}

.sd-score-ring {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  border: 3.5px solid #3b82f6;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #080c16;
  flex-shrink: 0;
}

.sd-score-ring.ring-perfect {
  border-color: #10b981;
}

.sd-score-ring.ring-warning {
  border-color: #f59e0b;
}

.sd-score-ring.ring-danger {
  border-color: #475569;
}

.sd-score-val {
  font-size: 24px;
  font-weight: 800;
  color: #f8fafc;
  font-family: Consolas, monospace;
  line-height: 1;
}

.sd-score-lbl {
  font-size: 9.5px;
  font-weight: 700;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 3px;
}

.sd-score-rating-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.sd-score-grade {
  font-size: 18px;
  font-weight: 800;
  color: #f8fafc;
}

.sd-score-desc {
  font-size: 13px;
  color: #94a3b8;
  line-height: 1.45;
}

.sd-results-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.sd-metric-box {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: #080c16;
  border: 1px solid #172236;
  border-radius: 8px;
  padding: 12px 14px;
}

.sd-metric-box-lbl {
  font-size: 11.5px;
  font-weight: 700;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.sd-metric-box-val {
  font-size: 21px;
  font-weight: 800;
  color: #f8fafc;
  font-family: Consolas, monospace;
  line-height: 1.2;
}

.sd-metric-box-sub {
  font-size: 12px;
  color: #94a3b8;
}

/* Mastery Section */
.sd-results-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sd-results-sec-title {
  font-size: 13px;
  font-weight: 700;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px;
}

.sd-mastery-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.sd-mastery-pill {
  background: #0d121e;
  border: 1px solid #172236;
  border-radius: 8px;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sd-mastery-pill-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
  font-weight: 600;
}

.sd-mastery-lbl {
  color: #cbd5e1;
  font-weight: 600;
}

.sd-mastery-count {
  color: #94a3b8;
  font-family: Consolas, monospace;
  font-size: 11px;
}

.sd-mastery-track {
  height: 4px;
  background: #172236;
  border-radius: 2px;
  overflow: hidden;
}

.sd-mastery-fill {
  height: 100%;
  border-radius: 2px;
  background: #3b82f6;
}

/* Question Evaluation List */
.sd-eval-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sd-eval-item {
  background: #0d121e;
  border: 1px solid #172236;
  border-radius: 10px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: all 0.15s ease;
}

.sd-eval-item:hover {
  background: #101726;
  border-color: #243048;
}

.sd-eval-item-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex: 1;
}

.sd-eval-qnum {
  font-size: 14px;
  font-weight: 700;
  color: #94a3b8;
  font-family: Consolas, monospace;
  width: 28px;
  flex-shrink: 0;
}

.sd-eval-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.sd-eval-title {
  font-size: 15px;
  font-weight: 600;
  color: #f8fafc;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sd-eval-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
}

.sd-marks-pill {
  font-size: 11.5px;
  font-weight: 700;
  padding: 2.5px 8px;
  border-radius: 5px;
  font-family: Consolas, monospace;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.sd-marks-pill.is-full-marks {
  background: rgba(16, 185, 129, 0.14);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.sd-marks-pill.is-zero-marks {
  background: rgba(100, 116, 139, 0.14);
  color: #94a3b8;
  border: 1px solid rgba(100, 116, 139, 0.28);
}

.sd-eval-item-right {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.sd-eval-status-tag {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 5px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.sd-eval-status-tag.tag-solved {
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.28);
}

.sd-eval-status-tag.tag-attempted {
  background: rgba(245, 158, 11, 0.12);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.28);
}

.sd-eval-status-tag.tag-unanswered {
  background: #141b2a;
  color: #94a3b8;
  border: 1px solid #1e293b;
}

.sd-eval-btn-review {
  background: #141c2e;
  border: 1px solid #23314d;
  color: #94a3b8;
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.12s ease;
  text-decoration: none;
  white-space: nowrap;
}

.sd-eval-btn-review:hover {
  background: #1d2b45;
  color: #f1f5f9;
  border-color: #3b82f6;
}

/* Results Actions Footer */
.sd-results-footer-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid #172236;
}

/* ==========================================================================
   Hide Code Review, Solution Inspection & Retake Buttons on Mobile / Tablet
   Desktop only features
   ========================================================================== */
@media (max-width: 1024px) {

  .sd-eval-btn-review,
  #sd-results-review-all-btn,
  #sd-results-retake-btn,
  body.is-results-view #exam-submit-trigger {
    display: none !important;
  }

  .sd-results-footer-actions {
    justify-content: center !important;
  }
}

body.is-mobile-or-tablet .sd-eval-btn-review,
body.is-mobile-or-tablet #sd-results-review-all-btn,
body.is-mobile-or-tablet #sd-results-retake-btn,
body.is-mobile-or-tablet.is-results-view #exam-submit-trigger {
  display: none !important;
}

body.is-mobile-or-tablet .sd-results-footer-actions {
  justify-content: center !important;
}

/* Responsive Mobile & Tablet Layout for Mock Results */
@media (max-width: 768px) {
  .sd-results-container {
    padding: 20px 16px 80px 16px;
    gap: 20px;
  }

  .sd-results-summary-card {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 18px 16px;
  }

  .sd-score-hero {
    border-right: none;
    border-bottom: 1px solid #172236;
    padding-bottom: 14px;
    padding-right: 0;
    gap: 14px;
  }

  .sd-score-ring {
    width: 78px;
    height: 78px;
  }

  .sd-score-val {
    font-size: 20px;
  }

  .sd-score-lbl {
    font-size: 8.5px;
  }

  .sd-results-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .sd-metric-box {
    padding: 10px 12px;
  }

  .sd-metric-box-val {
    font-size: 18px;
  }

  .sd-metric-box-lbl {
    font-size: 10.5px;
  }

  .sd-metric-box-sub {
    font-size: 11px;
  }

  .sd-mastery-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {

  .sd-exam-topbar,
  .lc-top-navbar {
    padding: 0 12px !important;
  }

  .sd-topbar-left {
    gap: 8px !important;
    min-width: 0 !important;
    flex: 1 1 auto !important;
    overflow: hidden !important;
  }

  .sd-brand-name {
    font-size: 14.5px !important;
  }

  .sd-breadcrumbs {
    gap: 5px !important;
    font-size: 11.5px !important;
    overflow: hidden !important;
  }

  .sd-breadcrumbs .sd-bc-cat {
    display: none !important;
  }

  .sd-breadcrumbs .sd-bc-sep:nth-of-type(1) {
    display: none !important;
  }

  .sd-btn-end-test {
    padding: 5px 12px !important;
    font-size: 12px !important;
    white-space: nowrap !important;
    flex-shrink: 0 !important;
  }

  .sd-results-badge-row {
    gap: 8px;
  }

  .sd-results-badge {
    font-size: 11px;
    padding: 3.5px 8px;
    white-space: normal;
    line-height: 1.3;
  }

  .sd-results-meta-pill {
    width: 100%;
    font-size: 12px;
    line-height: 1.4;
    margin-top: 2px;
  }

  .sd-results-title {
    font-size: 21px;
  }

  .sd-results-subtitle {
    font-size: 12.5px;
    line-height: 1.45;
  }

  .sd-eval-item {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 8px;
  }

  .sd-eval-item-left {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    min-width: 0;
    flex: 1 1 auto;
  }

  .sd-eval-qnum {
    font-size: 13px;
    width: 22px;
    padding-top: 1px;
    flex-shrink: 0;
  }

  .sd-eval-info {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .sd-eval-title {
    font-size: 13.5px;
    white-space: normal;
    line-height: 1.35;
    word-break: break-word;
  }

  .sd-eval-meta {
    gap: 6px;
    margin-top: 1px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
  }

  .sd-eval-item-right {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-shrink: 0;
    width: auto;
    padding: 0;
    border: none;
  }

  .sd-eval-status-tag {
    font-size: 11px;
    padding: 3.5px 8px;
    border-radius: 5px;
    white-space: nowrap;
  }

  .sd-eval-status-tag {
    font-size: 11px;
    padding: 3px 8px;
  }

  .sd-results-footer-actions {
    flex-direction: column;
    gap: 10px;
    width: 100%;
    justify-content: center !important;
  }

  .sd-results-footer-actions .exam-btn-subtle {
    width: 100% !important;
    justify-content: center !important;
    min-height: 42px !important;
    font-size: 13px !important;
    box-sizing: border-box !important;
  }
}

/* Responsive Collapsing for Small Screens */
@media (max-width: 1024px) {
  .sd-exam-layout {
    flex-direction: column !important;
    overflow-y: auto !important;
    height: calc(100vh - 52px) !important;
    padding: 10px !important;
  }

  .sd-exam-sidebar {
    width: 100% !important;
    min-width: 100% !important;
    max-width: 100% !important;
    height: auto !important;
    border-right: 1px solid #172236 !important;
  }

  .exam-question-item.is-active,
  .lc-split-layout.is-active {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
    height: auto !important;
  }

  .lc-split-resizer {
    display: none !important;
  }

  .sd-problem-pane,
  .sd-editor-pane {
    height: 520px !important;
  }
}

/* ==========================================================================
   Assessment Entry Briefing Dialog & Anti-Cheating Wake-Up Banner
   StudyDump Native Design Language
   ========================================================================== */
body.is-entry-dialog-active {
  overflow: hidden !important;
}

body.is-entry-dialog-active>*:not(dialog):not(.exam-dialog):not(#exam-device-restriction-dialog):not(#exam-entry-dialog):not(script):not(style) {
  filter: blur(0px) !important;
  pointer-events: none !important;
  user-select: none !important;
  opacity: 0.15 !important;
}

/* Pre-Flight Briefing Modal (.exam-entry-panel) */
.exam-dialog-panel.exam-entry-panel {
  max-width: 620px !important;
  background: #0d121e !important;
  border: 1px solid #1e293b !important;
  border-radius: 14px !important;
  box-shadow: 0 25px 65px -10px rgba(0, 0, 0, 0.85), 0 0 0 1px rgba(255, 255, 255, 0.04) !important;
  padding: 0 !important;
  overflow: hidden !important;
  display: flex !important;
  flex-direction: column !important;
}

.exam-dialog-panel.exam-entry-panel .exam-dialog-header {
  padding: 18px 22px 14px 22px;
  border-bottom: 1px solid #172236;
  background: #0a0f1a;
  flex-shrink: 0;
}

.exam-entry-badges {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.exam-user-profile-badge {
  font-size: 11.5px;
  color: #10b981;
  font-weight: 600;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 2px 8px;
  border-radius: 4px;
}

.exam-entry-meta {
  font-size: 12.5px;
  color: #94a3b8;
  font-weight: 500;
}

.exam-dialog-panel.exam-entry-panel .exam-dialog-body {
  padding: 16px 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
  overscroll-behavior: contain;
  flex: 1;
  min-height: 0;
}

.exam-entry-features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.exam-entry-feature-card {
  background: #111827;
  border: 1px solid #1f293d;
  border-radius: 9px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: left;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.exam-entry-feature-card:hover {
  border-color: rgba(56, 189, 248, 0.35);
  background: #152033;
}

.exam-entry-feature-header {
  display: flex;
  align-items: center;
  gap: 7px;
}

.exam-entry-feature-title {
  font-size: 13px;
  font-weight: 700;
  color: #f8fafc;
}

.exam-entry-feature-desc {
  font-size: 11.5px;
  color: #94a3b8;
  line-height: 1.4;
}

.exam-integrity-banner,
.exam-cheating-warning-card {
  background: linear-gradient(135deg, rgba(220, 38, 38, 0.09) 0%, rgba(153, 27, 27, 0.04) 100%);
  border: 1px solid rgba(220, 38, 38, 0.28);
  border-radius: 9px;
  padding: 13px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.exam-integrity-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 2px;
}

.exam-integrity-tag {
  color: #f87171;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.exam-integrity-quote {
  font-size: 13px;
  line-height: 1.5;
  color: #fee2e2;
  margin: 0;
}

.exam-integrity-quote strong {
  color: #ffffff;
  font-weight: 700;
}

.exam-integrity-subtext {
  font-size: 11.5px;
  color: #fca5a5;
  margin: 0;
  font-style: italic;
}

.exam-dialog-panel.exam-entry-panel .exam-dialog-actions {
  padding: 14px 22px;
  border-top: 1px solid #172236;
  background: #0a0f1a;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-shrink: 0;
}

/* Device Restriction Dialog */
.exam-dialog-panel.exam-device-panel {
  max-width: 460px !important;
  text-align: center !important;
  padding: 24px 20px !important;
  background: #0d121e !important;
  border: 1px solid #1e293b !important;
  border-radius: 16px !important;
  box-shadow: 0 25px 65px -10px rgba(0, 0, 0, 0.85) !important;
  box-sizing: border-box !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
}

.exam-device-icon-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.3);
  margin: 0 auto 12px auto;
}

.exam-device-tag-row {
  display: flex;
  justify-content: center;
  margin-bottom: 10px;
}

.exam-device-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 3px 12px;
  border-radius: 9999px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.28);
  color: #fbbf24;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: center;
  line-height: 1.2;
}

.exam-device-title {
  font-size: 1.25rem !important;
  font-weight: 700 !important;
  color: #f8fafc !important;
  margin: 0 0 8px 0 !important;
}

.exam-device-desc {
  font-size: 0.88rem;
  line-height: 1.5;
  color: #cbd5e1;
  margin: 0 0 14px 0;
}

.exam-device-note {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 8px;
  padding: 8px 12px;
  margin-bottom: 16px;
  text-align: center;
  width: 100%;
  box-sizing: border-box;
}

.exam-device-note span {
  font-size: 0.82rem;
  color: #a7f3d0;
  line-height: 1.4;
  display: block;
}

.exam-device-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
}

.exam-device-actions #btn-copy-mock-link {
  width: 100%;
  justify-content: center;
  padding: 10px;
  font-weight: 700;
  font-size: 0.88rem;
}

.exam-device-actions #btn-close-device-dialog {
  width: 100%;
  justify-content: center;
  padding: 9px;
  font-size: 0.84rem;
}

/* Mobile Responsive Optimization (< 640px) */
@media (max-width: 640px) {
  dialog.exam-dialog {
    padding: 10px 8px !important;
    align-items: center !important;
  }

  .exam-dialog-panel.exam-entry-panel {
    max-height: calc(100dvh - 20px) !important;
    border-radius: 12px !important;
  }

  .exam-dialog-panel.exam-entry-panel .exam-dialog-header {
    padding: 12px 14px 10px 14px !important;
  }

  .exam-entry-badges {
    gap: 6px !important;
    margin-bottom: 6px !important;
  }

  .exam-user-profile-badge {
    font-size: 10.5px !important;
    padding: 1px 6px !important;
  }

  .exam-entry-meta {
    font-size: 11px !important;
  }

  .exam-dialog-panel.exam-entry-panel .exam-dialog-title {
    font-size: 1.05rem !important;
    line-height: 1.25 !important;
    margin-bottom: 2px !important;
  }

  .exam-dialog-panel.exam-entry-panel .exam-dialog-subtitle {
    font-size: 0.74rem !important;
    line-height: 1.35 !important;
  }

  .exam-dialog-panel.exam-entry-panel .exam-dialog-body {
    padding: 9px 12px 10px 12px !important;
    gap: 8px !important;
  }

  .exam-entry-features-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 6px !important;
  }

  .exam-entry-feature-card {
    padding: 7px 9px !important;
    border-radius: 7px !important;
    gap: 2px !important;
  }

  .exam-entry-feature-header {
    gap: 5px !important;
  }

  .exam-entry-feature-header svg {
    width: 13px !important;
    height: 13px !important;
  }

  .exam-entry-feature-title {
    font-size: 11.5px !important;
    font-weight: 700 !important;
  }

  .exam-entry-feature-desc {
    font-size: 10px !important;
    line-height: 1.28 !important;
  }

  .exam-integrity-banner,
  .exam-cheating-warning-card {
    padding: 9px 11px !important;
    border-radius: 7px !important;
    gap: 3px !important;
  }

  .exam-integrity-header {
    gap: 5px !important;
    margin-bottom: 1px !important;
  }

  .exam-integrity-header svg {
    width: 12px !important;
    height: 12px !important;
  }

  .exam-integrity-tag {
    font-size: 10px !important;
  }

  .exam-integrity-quote {
    font-size: 11px !important;
    line-height: 1.4 !important;
  }

  .exam-integrity-subtext {
    font-size: 10px !important;
  }

  .exam-dialog-panel.exam-entry-panel .exam-dialog-actions {
    padding: 9px 12px 11px 12px !important;
    display: flex !important;
    gap: 8px !important;
  }

  .exam-dialog-panel.exam-entry-panel .exam-btn-subtle,
  .exam-dialog-panel.exam-entry-panel .exam-btn-primary {
    flex: 1 1 50% !important;
    justify-content: center !important;
    padding: 8px 10px !important;
    font-size: 11.5px !important;
    min-height: 38px !important;
    box-sizing: border-box !important;
  }

  .exam-dialog-panel.exam-device-panel {
    padding: 20px 16px !important;
    border-radius: 12px !important;
    max-height: calc(100dvh - 20px) !important;
  }

  .exam-device-icon-badge {
    width: 44px !important;
    height: 44px !important;
    margin-bottom: 8px !important;
  }

  .exam-device-icon-badge svg {
    width: 22px !important;
    height: 22px !important;
  }

  .exam-device-title {
    font-size: 1.15rem !important;
  }

  .exam-device-desc {
    font-size: 0.82rem !important;
    line-height: 1.4 !important;
    margin-bottom: 10px !important;
  }

  .exam-device-note {
    padding: 6px 10px !important;
    margin-bottom: 12px !important;
  }

  .exam-device-note span {
    font-size: 0.78rem !important;
  }

  .exam-device-actions #btn-copy-mock-link {
    padding: 9px 10px !important;
    font-size: 0.84rem !important;
  }

  .exam-device-actions #btn-close-device-dialog {
    padding: 8px 10px !important;
    font-size: 0.8rem !important;
  }
}

/* Upper-half Question Passed Toast Popup */
.sd-exam-passed-toast {
  position: fixed;
  top: 22px;
  left: 50%;
  transform: translateX(-50%) translateY(-22px) scale(0.92);
  z-index: 100000;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  background: rgba(11, 17, 30, 0.94);
  border: 1px solid rgba(16, 185, 129, 0.45);
  border-radius: 9999px;
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.55), 0 0 24px rgba(16, 185, 129, 0.2);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.sd-exam-passed-toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0) scale(1);
}

.sd-exam-passed-toast.is-hiding {
  opacity: 0;
  transform: translateX(-50%) translateY(-16px) scale(0.94);
  transition: opacity 0.25s ease-in, transform 0.25s ease-in;
}

.sd-toast-badge {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.2);
  border: 1.5px solid #10b981;
  color: #10b981;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sd-toast-content {
  display: flex;
  align-items: center;
  white-space: nowrap;
}

.sd-toast-title {
  font-size: 12.5px;
  font-weight: 700;
  color: #f8fafc;
  letter-spacing: 0.01em;
}

/* ==========================================================================
   Syllabus Scope Validation Button & Modal Dialog
   StudyDump Native Design Language
   ========================================================================== */

.mock-header-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.mock-header-lead {
  margin: 0 !important;
  color: #94a3b8;
  font-size: 0.9375rem;
  line-height: 1.5;
}

.btn-syllabus-scope {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  color: #94a3b8;
  background: #0f172a;
  border: 1px solid #1e293b;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn-syllabus-scope:hover {
  background: #172236;
  border-color: #3b82f6;
  color: #f8fafc;
}

.btn-syllabus-scope svg {
  color: #64748b;
  transition: color 0.15s ease;
  flex-shrink: 0;
}

.btn-syllabus-scope:hover svg {
  color: #3b82f6;
}

/* Modal Dialog */
dialog.syllabus-dialog {
  border: none;
  padding: 0;
  background: transparent;
  max-width: min(780px, calc(100vw - 32px));
  width: 100%;
  border-radius: 12px;
  margin: auto;
  color: #f8fafc;
  box-sizing: border-box;
}

dialog.syllabus-dialog:not([open]) {
  display: none;
}

dialog.syllabus-dialog::backdrop {
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.syllabus-dialog-panel {
  background: #0d121e;
  border: 1px solid #1e293b;
  border-radius: 12px;
  box-shadow: 0 25px 65px -10px rgba(0, 0, 0, 0.85), 0 0 0 1px rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  max-height: calc(90vh - 40px);
  overflow: hidden;
  font-family: inherit;
  box-sizing: border-box;
}

.syllabus-dialog-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px 16px 24px;
  border-bottom: 1px solid #172236;
  background: #0d121e;
}

.syllabus-dialog-title-group {
  flex: 1;
}

.syllabus-dialog-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #f8fafc;
  margin: 0 0 4px 0 !important;
  letter-spacing: -0.01em;
}

.syllabus-dialog-subtitle {
  font-size: 0.8125rem;
  color: #94a3b8;
  margin: 0 !important;
  line-height: 1.4;
}

.syllabus-dialog-close {
  background: transparent;
  border: 1px solid transparent;
  color: #94a3b8;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
  padding: 0;
  flex-shrink: 0;
}

.syllabus-dialog-close:hover {
  background: #172236;
  border-color: #243048;
  color: #f8fafc;
}

.syllabus-dialog-body {
  padding: 20px 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 0.875rem;
  color: #cbd5e1;
  line-height: 1.6;
}

.syllabus-scope-intro {
  margin: 0 !important;
  color: #94a3b8;
  font-size: 0.875rem;
  line-height: 1.5;
}

.syllabus-table-wrapper {
  border: 1px solid #172236;
  border-radius: 8px;
  overflow: hidden;
  background: #0b0f19;
}

.syllabus-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.8125rem;
  line-height: 1.5;
  margin: 0 !important;
}

.syllabus-table th {
  background: #101726;
  color: #94a3b8;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 10px 14px;
  border-bottom: 1px solid #172236;
}

.syllabus-table td {
  padding: 10px 14px;
  border-bottom: 1px solid #172236;
  color: #cbd5e1;
  vertical-align: top;
}

.syllabus-table tr:last-child td {
  border-bottom: none;
}

.syllabus-table code {
  font-family: Consolas, monospace;
  font-size: 0.75rem;
  padding: 1.5px 5px;
  background: #131b2e;
  border: 1px solid #1e293b;
  border-radius: 4px;
  color: #93c5fd;
}

.syllabus-dialog-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 14px 24px;
  border-top: 1px solid #172236;
  background: #0b0f19;
  border-bottom-left-radius: 12px;
  border-bottom-right-radius: 12px;
}

.btn-syllabus-dismiss {
  padding: 6px 18px;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #cbd5e1;
  background: #141c2e;
  border: 1px solid #23314d;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-syllabus-dismiss:hover {
  background: #1d2b45;
  color: #ffffff;
  border-color: #3b82f6;
}

.btn-syllabus-dismiss:active {
  transform: translateY(1px);
}

/* Light Theme */
[data-theme="light"] dialog.syllabus-dialog::backdrop {
  background: rgba(15, 23, 42, 0.45);
}

[data-theme="light"] .btn-syllabus-scope {
  background: #f8fafc;
  border-color: #e2e8f0;
  color: #475569;
}

[data-theme="light"] .btn-syllabus-scope:hover {
  background: #f1f5f9;
  border-color: #2563eb;
  color: #0f172a;
}

[data-theme="light"] .btn-syllabus-scope svg {
  color: #94a3b8;
}

[data-theme="light"] .btn-syllabus-scope:hover svg {
  color: #2563eb;
}

[data-theme="light"] .syllabus-dialog-panel {
  background: #ffffff !important;
  border-color: #e2e8f0 !important;
  color: #0f172a !important;
  box-shadow: 0 25px 65px -10px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.05) !important;
}

[data-theme="light"] .syllabus-dialog-header {
  background: #ffffff;
  border-color: #f1f5f9;
}

[data-theme="light"] .syllabus-dialog-title {
  color: #0f172a !important;
}

[data-theme="light"] .syllabus-dialog-subtitle {
  color: #64748b !important;
}

[data-theme="light"] .syllabus-dialog-close {
  color: #64748b;
}

[data-theme="light"] .syllabus-dialog-close:hover {
  background: #f1f5f9;
  border-color: #e2e8f0;
  color: #0f172a;
}

[data-theme="light"] .syllabus-dialog-body {
  color: #334155;
}

[data-theme="light"] .syllabus-scope-intro {
  color: #475569;
}

[data-theme="light"] .syllabus-table-wrapper {
  background: #f8fafc;
  border-color: #e2e8f0;
}

[data-theme="light"] .syllabus-table th {
  background: #f1f5f9;
  color: #475569;
  border-color: #e2e8f0;
}

[data-theme="light"] .syllabus-table td {
  color: #1e293b;
  border-color: #e2e8f0;
}

[data-theme="light"] .syllabus-table code {
  background: #ffffff;
  border-color: #cbd5e1;
  color: #2563eb;
}

[data-theme="light"] .syllabus-dialog-footer {
  background: #f8fafc;
  border-color: #e2e8f0;
}

[data-theme="light"] .btn-syllabus-dismiss {
  background: #ffffff;
  border-color: #cbd5e1;
  color: #0f172a;
}

[data-theme="light"] .btn-syllabus-dismiss:hover {
  background: #f1f5f9;
  border-color: #94a3b8;
}

@media (max-width: 680px) {
  .mock-header-actions {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .mock-sections-accordion {
    gap: 0.85rem;
  }

  .mock-section-block {
    border-radius: 12px;
    background: var(--bg-surface);
    border: 1px solid var(--border-default);
    transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  }

  .mock-section-block:active {
    transform: scale(0.988) !important;
    border-color: var(--accent);
  }

  .mock-section-row {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 16px 14px 16px;
    gap: 10px;
    cursor: pointer;
  }

  .mock-section-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    font-family: var(--font-mono, monospace);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    padding: 2.5px 8px;
    border-radius: 6px;
    background: var(--accent-subtle, rgba(56, 189, 248, 0.12));
    color: var(--accent);
    border: 1px solid var(--accent-border, rgba(56, 189, 248, 0.25));
    margin-bottom: 2px;
  }

  .mock-section-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 100%;
  }

  .mock-section-title {
    font-size: 1.05rem !important;
    font-weight: 700 !important;
    line-height: 1.35 !important;
    color: var(--text-primary);
    word-break: normal;
  }

  .mock-section-meta {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.45;
  }

  .mock-section-badge-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 9px 14px;
    font-size: 0.84rem;
    font-weight: 600;
    border-radius: 8px;
    background: var(--accent-subtle);
    border: 1px solid var(--accent-border);
    color: var(--accent);
    margin-top: 4px;
    box-sizing: border-box;
    text-align: center;
    transition: all var(--transition-fast);
  }

  .mock-section-block:active .mock-section-badge-cta {
    background: var(--accent);
    color: var(--text-inverse, #0d0f12);
    border-color: var(--accent);
  }
}

/* ==========================================================================
   Student Profile & Personalization Modal
   ========================================================================== */

.studydump-profile-modal {
  position: fixed;
  inset: 0;
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(4, 7, 14, 0.92);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.12s ease, visibility 0.12s ease;
  padding: 20px 16px;
  box-sizing: border-box;
}

.studydump-profile-modal.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

html.is-profile-modal-active {
  overflow: hidden !important;
  height: 100% !important;
  overscroll-behavior: none !important;
  -webkit-overflow-scrolling: auto !important;
}

body.is-profile-modal-active {
  overflow: hidden !important;
  overscroll-behavior: none !important;
  touch-action: none;
}

body.is-profile-modal-active>*:not(.studydump-profile-modal):not(#studydump-profile-modal):not(.studydump-sync-modal):not(#studydump-sync-modal):not(script):not(style) {
  filter: blur(0px) !important;
  pointer-events: none !important;
  user-select: none !important;
  opacity: 0.15 !important;
}

.sd-profile-card {
  background: var(--bg-surface, #15181d);
  border: 1px solid var(--border-default, #22262e);
  border-radius: var(--radius-lg, 12px);
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-xl, 0 20px 40px rgba(0, 0, 0, 0.5));
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transform: scale(0.96) translateY(6px);
  transition: transform 0.24s cubic-bezier(0.16, 1, 0.3, 1);
  box-sizing: border-box;
}

.studydump-profile-modal.is-open .sd-profile-card {
  transform: scale(1) translateY(0);
}

.sd-profile-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.sd-profile-avatar-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md, 8px);
  background: var(--accent-subtle, rgba(123, 167, 217, 0.12));
  border: 1px solid var(--accent-border, rgba(123, 167, 217, 0.25));
  color: var(--accent, #7ba7d9);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sd-profile-header-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.sd-profile-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  padding: 3px 10px;
  border-radius: 9999px;
  background: var(--accent-subtle, rgba(123, 167, 217, 0.12));
  border: 1px solid var(--accent-border, rgba(123, 167, 217, 0.25));
  color: var(--accent, #7ba7d9);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.sd-profile-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary, #e6edf3);
  margin: 0;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.sd-profile-subtitle {
  font-size: 0.84rem;
  line-height: 1.45;
  color: var(--text-secondary, #8b949e);
  margin: 0;
}

.sd-profile-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sd-profile-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sd-profile-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary, #8b949e);
  display: flex;
  align-items: center;
  gap: 4px;
}

.sd-required {
  color: #ef4444;
}

.sd-profile-input,
.sd-profile-select {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-canvas, #0d1117);
  border: 1px solid var(--border-default, #22262e);
  border-radius: var(--radius-sm, 6px);
  color: var(--text-primary, #e6edf3);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition-fast, 0.15s ease), box-shadow var(--transition-fast, 0.15s ease);
  box-sizing: border-box;
}

.sd-profile-input:focus,
.sd-profile-select:focus {
  border-color: var(--accent, #7ba7d9);
  box-shadow: 0 0 0 3px var(--accent-subtle, rgba(123, 167, 217, 0.2));
}

.sd-profile-hint {
  font-size: 0.73rem;
  color: var(--text-tertiary, #8b949e);
  margin-top: 2px;
  line-height: 1.35;
}

.sd-profile-error {
  font-size: 0.78rem;
  color: #f87171;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-radius: var(--radius-sm, 6px);
  padding: 8px 12px;
}

.sd-profile-actions {
  margin-top: 4px;
}

.sd-profile-submit-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: var(--radius-sm, 6px);
  border: none;
  background: var(--accent, #7ba7d9);
  color: #0d1117;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  touch-action: manipulation;
  transition: filter var(--transition-fast, 0.15s ease), transform 0.1s ease;
}

.sd-profile-submit-btn:hover {
  filter: brightness(1.1);
}

.sd-profile-submit-btn:active {
  transform: scale(0.985);
}

.sd-profile-footer-sync {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--border-default, #22262e);
  font-size: 0.78rem;
  color: var(--text-muted, #6e7681);
}

.sd-profile-sync-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: transparent;
  border: none;
  color: var(--accent, #7ba7d9);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: var(--radius-xs, 4px);
  touch-action: manipulation;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity 0.15s ease, background-color 0.15s ease;
}

.sd-profile-sync-link:hover {
  opacity: 0.85;
}

/* Returning User Edit Profile Modal Styles */
.sd-profile-header-edit {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.sd-profile-user-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.sd-profile-user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--accent-subtle, rgba(123, 167, 217, 0.12));
  border: 1.5px solid var(--accent-border, rgba(123, 167, 217, 0.3));
  color: var(--accent, #7ba7d9);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 700;
  text-transform: uppercase;
  flex-shrink: 0;
}

.sd-profile-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.sd-profile-group-pill {
  display: inline-flex;
  align-items: center;
  padding: 1px 7px;
  border-radius: var(--radius-xs, 4px);
  background: var(--accent-subtle, rgba(123, 167, 217, 0.12));
  border: 1px solid var(--accent-border, rgba(123, 167, 217, 0.25));
  color: var(--accent, #7ba7d9);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.sd-profile-close-btn {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm, 6px);
  border: 1px solid var(--border-default, #22262e);
  background: transparent;
  color: var(--text-muted, #6e7681);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  touch-action: manipulation;
  transition: all var(--transition-fast, 0.15s ease);
}

.sd-profile-close-btn:hover {
  color: var(--text-primary, #e6edf3);
  border-color: var(--text-secondary, #8b949e);
  background: rgba(255, 255, 255, 0.05);
}

.sd-profile-sync-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  background: var(--bg-canvas, #0d1117);
  border: 1px solid var(--border-default, #22262e);
  border-radius: var(--radius-sm, 6px);
  margin-top: 2px;
}

.sd-profile-sync-panel-info {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.sd-profile-sync-panel-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-xs, 4px);
  background: var(--accent-subtle, rgba(123, 167, 217, 0.12));
  color: var(--accent, #7ba7d9);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sd-profile-sync-panel-text {
  min-width: 0;
}

.sd-profile-sync-panel-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary, #e6edf3);
}

.sd-profile-sync-panel-desc {
  font-size: 0.72rem;
  color: var(--text-muted, #6e7681);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sd-profile-sync-panel-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 10px;
  border-radius: var(--radius-xs, 4px);
  background: var(--accent-subtle, rgba(123, 167, 217, 0.12));
  border: 1px solid var(--accent-border, rgba(123, 167, 217, 0.3));
  color: var(--accent, #7ba7d9);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  touch-action: manipulation;
  transition: all var(--transition-fast, 0.15s ease);
}

.sd-profile-sync-panel-btn:hover {
  background: var(--accent, #7ba7d9);
  color: #0d1117;
}

/* Connected Devices in Student Profile */
.sd-profile-sync-section {
  background: var(--bg-canvas, #0d1117);
  border: 1px solid var(--border-default, #22262e);
  border-radius: var(--radius-sm, 6px);
  padding: 10px 12px;
  margin-top: 2px;
}

.sd-profile-sync-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.sd-profile-sync-title-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.sd-profile-sync-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary, #e6edf3);
}

.sd-profile-sync-code-pill {
  display: inline-flex;
  align-items: center;
  padding: 1px 6px;
  border-radius: var(--radius-xs, 4px);
  background: var(--accent-subtle, rgba(123, 167, 217, 0.12));
  border: 1px solid var(--accent-border, rgba(123, 167, 217, 0.25));
  color: var(--accent, #7ba7d9);
  font-size: 10.5px;
  font-family: var(--font-mono, monospace);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.sd-profile-devices-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 160px;
  overflow-y: auto;
}

.sd-device-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px;
  background: var(--bg-surface, #15181d);
  border: 1px solid var(--border-subtle, #1e2228);
  border-radius: var(--radius-xs, 4px);
  transition: all var(--transition-fast, 0.15s ease);
}

.sd-device-item.is-current {
  border-color: rgba(46, 160, 67, 0.35);
  background: rgba(46, 160, 67, 0.04);
}

.sd-device-icon-wrap {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-xs, 4px);
  background: var(--accent-subtle, rgba(123, 167, 217, 0.12));
  color: var(--accent, #7ba7d9);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sd-device-item.is-current .sd-device-icon-wrap {
  background: rgba(46, 160, 67, 0.15);
  color: #3fb950;
}

.sd-device-info {
  flex: 1;
  min-width: 0;
}

.sd-device-name-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sd-device-name {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-primary, #e6edf3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sd-device-tag {
  font-size: 9.5px;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 3px;
  white-space: nowrap;
}

.sd-device-tag.sd-device-current {
  background: rgba(46, 160, 67, 0.18);
  border: 1px solid rgba(46, 160, 67, 0.4);
  color: #3fb950;
}

.sd-device-meta {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.7rem;
  color: var(--text-muted, #6e7681);
}

.sd-device-dot {
  opacity: 0.6;
}

.sd-device-empty {
  padding: 8px;
  text-align: center;
  font-size: 0.74rem;
  color: var(--text-muted, #6e7681);
}

.sd-profile-edit-actions {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 10px;
  margin-top: 4px;
}

.sd-profile-cancel-btn {
  padding: 11px 14px;
  border-radius: var(--radius-sm, 6px);
  border: 1px solid var(--border-default, #22262e);
  background: var(--bg-canvas, #0d1117);
  color: var(--text-secondary, #8b949e);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  touch-action: manipulation;
  transition: all var(--transition-fast, 0.15s ease);
}

.sd-profile-cancel-btn:hover {
  background: var(--bg-surface, #15181d);
  color: var(--text-primary, #e6edf3);
  border-color: var(--text-secondary, #8b949e);
}

/* Header Profile Pill */
.header-profile-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  height: 38px;
  min-height: 38px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  touch-action: manipulation;
  transition: all var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.header-profile-btn:hover {
  border-color: var(--border-strong);
  color: var(--accent);
}

.header-profile-name {
  max-width: 110px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.header-profile-group {
  font-size: 10.5px;
  padding: 1px 5px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent, #10b981);
  font-weight: 700;
}

/* Responsive Rules for Profile Modal & Header Profile */
@media (max-width: 768px) {
  .header-profile-btn {
    height: 34px;
    min-height: 34px;
    padding: 0 10px;
    gap: 5px;
    font-size: 11.5px;
  }
}

/* On mobile devices (<= 680px), show only the User icon; full name and group appear on tablets and desktops */
@media (max-width: 680px) {
  .header-profile-btn {
    width: 38px;
    min-width: 38px;
    height: 38px;
    min-height: 38px;
    padding: 0 !important;
    justify-content: center !important;
    gap: 0 !important;
  }

  .header-profile-btn svg {
    width: 15px;
    height: 15px;
  }

  .header-profile-name,
  .header-profile-group {
    display: none !important;
  }
}

@media (max-width: 480px) {
  .header-profile-btn {
    width: 34px;
    min-width: 34px;
    height: 34px;
    min-height: 34px;
    padding: 0 !important;
    justify-content: center !important;
  }

  .studydump-profile-modal {
    padding: 12px;
  }

  .sd-profile-card {
    padding: 20px 16px;
    gap: 14px;
    border-radius: 14px;
    max-height: calc(100dvh - 24px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .sd-profile-title {
    font-size: 1.2rem;
  }

  .sd-profile-subtitle {
    font-size: 0.8rem;
  }

  .sd-profile-submit-btn {
    padding: 11px 16px;
    font-size: 0.88rem;
  }
}

@media (max-height: 520px) {
  .sd-profile-card {
    padding: 16px 14px;
    gap: 10px;
    max-height: calc(100dvh - 16px);
  }

  .sd-profile-title {
    font-size: 1.1rem;
  }

  .sd-profile-form {
    gap: 10px;
  }
}

/* ==========================================================================
   Cross-Device Sync Modal & Toast Notifications
   ========================================================================== */

.studydump-sync-modal {
  position: fixed;
  inset: 0;
  z-index: 100010;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(4, 7, 14, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.16s ease, visibility 0.16s ease;
  padding: 16px;
  box-sizing: border-box;
}

.studydump-sync-modal.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

html.is-sync-modal-active {
  overflow: hidden !important;
  height: 100% !important;
  overscroll-behavior: none !important;
  -webkit-overflow-scrolling: auto !important;
}

body.is-sync-modal-active {
  overflow: hidden !important;
  overscroll-behavior: none !important;
  touch-action: none;
}

.sd-sync-card {
  position: relative;
  background: var(--bg-surface, #15181d);
  border: 1px solid var(--border-default, #22262e);
  border-radius: var(--radius-md, 8px);
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-modal, 0 20px 48px rgba(0, 0, 0, 0.65));
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transform: scale(0.96);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-sizing: border-box;
}

.studydump-sync-modal.is-open .sd-sync-card {
  transform: scale(1);
}

.sd-sync-close-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  background: transparent;
  border: 1px solid var(--border-default, #22262e);
  color: var(--text-secondary, #8b909a);
  border-radius: var(--radius-xs, 4px);
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast, 140ms ease-out);
}

.sd-sync-close-btn:hover {
  background: var(--bg-surface-subtle, #1f232b);
  color: var(--text-primary, #d9dce2);
}

.sd-sync-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-right: 28px;
}

.sd-sync-title {
  font-family: var(--font-display, var(--font-sans, sans-serif));
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary, #d9dce2);
  margin: 0;
  letter-spacing: -0.015em;
}

.sd-sync-subtitle {
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--text-secondary, #8b909a);
  margin: 0;
}

.sd-sync-body {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
  align-items: stretch;
}

.sd-sync-col {
  display: flex;
  flex-direction: column;
}

.sd-sync-qr-col {
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
}

.sd-sync-qr-wrapper {
  background: #ffffff;
  padding: 6px;
  border-radius: var(--radius-md, 6px);
  border: 1px solid var(--border-default, #22262e);
  box-shadow: var(--shadow-subtle, 0 2px 6px rgba(0, 0, 0, 0.2));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 140px;
  height: 140px;
  box-sizing: border-box;
}

.sd-sync-qrcode-canvas canvas,
.sd-sync-qrcode-canvas img {
  display: block;
  width: 128px !important;
  height: 128px !important;
  border-radius: 2px;
}

.sd-sync-qr-hint {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary, #8b909a);
  text-align: center;
  margin: 0;
}

.sd-sync-form-col {
  justify-content: space-between;
  gap: 10px;
}

.sd-sync-code-box {
  background: var(--accent-subtle, rgba(123, 167, 217, 0.12));
  border: 1px solid var(--accent-border, rgba(123, 167, 217, 0.28));
  border-radius: var(--radius-sm, 6px);
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.sd-sync-code-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sd-sync-code-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent, #7ba7d9);
}

.sd-sync-code-display {
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary, #d9dce2);
  letter-spacing: 0.08em;
}

.sd-sync-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--bg-surface, #15181d);
  border: 1px solid var(--border-default, #22262e);
  color: var(--text-primary, #d9dce2);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: var(--radius-xs, 4px);
  cursor: pointer;
  transition: all var(--transition-fast, 140ms ease-out);
  white-space: nowrap;
}

.sd-sync-copy-btn:hover {
  background: var(--accent-subtle);
  border-color: var(--accent-border);
  color: var(--accent);
}

.sd-sync-connect-form {
  display: flex;
  flex-direction: column;
}

.sd-sync-input-group {
  display: flex;
  gap: 6px;
}

.sd-sync-input {
  flex: 1;
  background: var(--bg-app, #0d0f12);
  border: 1px solid var(--border-default, #22262e);
  border-radius: var(--radius-xs, 4px);
  padding: 8px 10px;
  color: var(--text-primary, #d9dce2);
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.sd-sync-input:focus {
  border-color: var(--accent, #7ba7d9);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.sd-sync-connect-btn {
  background: var(--accent, #7ba7d9);
  border: 1px solid var(--accent, #7ba7d9);
  color: var(--text-inverse, #0d0f12);
  font-weight: 700;
  font-size: 0.8rem;
  padding: 0 14px;
  border-radius: var(--radius-xs, 4px);
  cursor: pointer;
  transition: all var(--transition-fast, 140ms ease-out);
  white-space: nowrap;
}

.sd-sync-connect-btn:hover {
  filter: brightness(1.12);
}

.sd-sync-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2px;
}

.sd-sync-status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.74rem;
  font-weight: 500;
  color: #10b981;
}

.sd-sync-pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: sdPulse 1.8s infinite;
}

@keyframes sdPulse {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.sd-sync-unlink-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary, #8b909a);
  font-size: 0.72rem;
  font-weight: 500;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
  text-decoration: underline;
  transition: color var(--transition-fast);
}

.sd-sync-unlink-btn:hover {
  color: var(--callout-important-border, #e06050);
}

/* Toast Container */
.sd-toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.sd-toast-item {
  background: var(--bg-surface-elevated, #1b1f25);
  border: 1px solid var(--border-default, #22262e);
  box-shadow: var(--shadow-modal, 0 10px 25px rgba(0, 0, 0, 0.5));
  color: var(--text-primary, #d9dce2);
  padding: 10px 14px;
  border-radius: var(--radius-sm, 6px);
  font-size: 0.82rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
}

.sd-toast-item.show {
  transform: translateY(0);
  opacity: 1;
}

.sd-toast-item svg {
  color: #10b981;
  flex-shrink: 0;
}

@media (max-width: 540px) {
  .sd-sync-card {
    padding: 20px 16px;
    max-height: calc(100dvh - 32px);
    overflow-y: auto;
  }
  .sd-sync-body {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .sd-sync-qr-col {
    order: 2;
  }
  .sd-sync-form-col {
    order: 1;
  }
  .sd-toast-container {
    bottom: 16px;
    right: 16px;
    left: 16px;
  }
}

/* Prevent underlying page scroll when student feedback modal is active across all devices */
html.is-feedback-modal-active {
  overflow: hidden !important;
  height: 100% !important;
  overscroll-behavior: none !important;
  -webkit-overflow-scrolling: auto !important;
}

body.is-feedback-modal-active {
  position: fixed !important;
  top: calc(var(--sd-fb-scroll-y, 0px) * -1) !important;
  left: 0 !important;
  right: 0 !important;
  width: 100% !important;
  height: 100% !important;
  overflow: hidden !important;
  overscroll-behavior: none !important;
  touch-action: none !important;
  padding-right: var(--sd-fb-scrollbar-width, 0px) !important;
}