* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0f1117;
  --surface: #161b22;
  --surface-alt: #1c2128;
  --border: #30363d;
  --text: #e8e8e4;
  --muted: #8b949e;
  --accent: #f59e0b;
  --mono: 'Courier New', Courier, monospace;
  --sidebar-width: 220px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
}

/* Site Layout - Flex container for sidebar + content + toc */
.site-layout {
  display: flex;
  min-height: 100vh;
}

.site-layout.sidebar-collapsed {
  --sidebar-width: 0px;
}

/* Sidebar - Sticky on the left */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 3.5rem 0.75rem 1.25rem;
  background: var(--surface);
  border-right: 1px solid var(--border);
  transition: width 0.25s ease, padding 0.25s ease;
}

.sidebar.collapsed {
  width: 0;
  padding-left: 0;
  padding-right: 0;
  overflow: hidden;
}

/* Content Column - Flexible main content area */
.content-column {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* TOC Sidebar - Right side navigation */
.toc-sidebar {
  width: 260px;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 1.5rem 1rem;
  background: var(--surface);
  border-left: 1px solid var(--border);
}

/* Header - Now inside content-column, no margin needed */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 2rem;
  flex-shrink: 0;
}

.header-inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.logo-link {
  display: inline-block;
  margin-bottom: 0.6rem;
  color: var(--accent);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 1rem;
}

.logo-link:hover {
  text-decoration: underline;
}

.badge {
  display: inline-block;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 0.35rem 0.7rem;
  border-radius: 0.25rem;
  font-size: 0.72rem;
  font-family: var(--mono);
  margin-bottom: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h1 {
  font-size: 1.7rem;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.subtitle {
  color: var(--muted);
  font-size: 0.92rem;
}

.breadcrumb {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 0.9rem;
}

.breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

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

.breadcrumb .sep {
  margin: 0 0.35rem;
  opacity: 0.45;
}

.breadcrumb .current {
  color: var(--text);
}

/* Main content area */
main {
  max-width: 980px;
  padding: 2rem 4rem;
  flex: 1;
}

/* Collapsed state - wider content */
.site-layout.sidebar-collapsed main {
  max-width: 1200px;
}

/* Right side vertical rail for utility buttons */
.right-rail {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 1150;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
}

.search-launcher {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 0.3rem;
  background: var(--surface);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
}
.search-launcher:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.search-launcher-label {
  display: none;
}
.search-launcher-shortcut {
  display: none;
}

.search-launcher:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.search-launcher-shortcut {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
}

.search-tip-toast {
  position: fixed;
  right: 1rem;
  bottom: 3.9rem;
  z-index: 1150;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  max-width: min(420px, calc(100vw - 2rem));
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--surface);
  color: var(--text);
  padding: 0.5rem 0.6rem;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  font-size: 0.8rem;
}

.search-tip-toast[hidden] {
  display: none !important;
}

.search-tip-toast kbd {
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  background: var(--bg);
  color: var(--accent);
  padding: 0.05rem 0.3rem;
  font-family: var(--mono);
  font-size: 0.72rem;
}

.search-tip-dismiss {
  border: 1px solid var(--border);
  border-radius: 0.3rem;
  background: var(--bg);
  color: var(--muted);
  padding: 0.2rem 0.45rem;
  font-size: 0.72rem;
  cursor: pointer;
  white-space: nowrap;
}

.search-tip-dismiss:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.command-palette {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 10vh 1rem 1rem;
}

.command-palette[hidden] {
  display: none !important;
}

.command-palette-backdrop {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(0, 0, 0, 0.55);
}

.command-palette-dialog {
  position: relative;
  width: min(760px, 100%);
  max-height: 76vh;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--surface);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
  display: flex;
  flex-direction: column;
}

.command-palette-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface-alt);
}

.command-palette-input {
  width: 100%;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 0.3rem;
  background: var(--bg);
  color: var(--text);
  font-size: 0.94rem;
}

.command-palette-input:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}

.command-palette-hint {
  color: var(--muted);
  font-size: 0.72rem;
  font-family: var(--mono);
  white-space: nowrap;
}

.command-palette-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.command-palette-filters .chip {
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--muted);
  font-size: 0.7rem;
  padding: 0.14rem 0.48rem;
  border-radius: 999px;
  cursor: pointer;
}

.command-palette-filters .chip.is-active {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
}

.command-palette-results {
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--surface);
  overflow: hidden;
  overflow-y: auto;
}

.command-palette-results li a,
.command-palette-results li button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.6rem 0.75rem;
  text-decoration: none;
  border: 0;
  border-top: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
}

.command-palette-results li:first-child a,
.command-palette-results li:first-child button { border-top: 0; }

.command-palette-results li.active a,
.command-palette-results li.active button,
.command-palette-results li a:hover,
.command-palette-results li button:hover {
  background: var(--surface);
}

.command-palette-results .title {
  display: block;
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.25;
}

.command-palette-results .title mark {
  background: transparent;
  color: var(--accent);
  padding: 0;
}

.command-palette-results .meta {
  display: inline-block;
  width: fit-content;
  color: var(--muted);
  font-size: 0.66rem;
  margin-top: 0.2rem;
  padding: 0.06rem 0.42rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-left: 1px solid var(--border);
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.command-palette-results .path {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  margin-top: 0.1rem;
  font-family: var(--mono);
  opacity: 0.9;
}

.command-palette-results .snippet {
  display: block;
  color: var(--text);
  font-size: 0.78rem;
  margin-top: 0.22rem;
  line-height: 1.35;
  opacity: 0.95;
}

.command-palette-results .snippet mark {
  background: transparent;
  color: var(--accent);
  padding: 0 0.08rem;
  border-radius: 0.12rem;
}

.command-palette-results .empty {
  color: var(--muted);
  padding: 0.7rem 0.75rem;
  font-size: 0.85rem;
}


.tree { list-style: none; margin: 0; padding: 0; }
.tree-children { list-style: none; margin: 0; padding-left: 0.75rem; }

.tree-link {
  display: block;
  padding: 0.3rem 0.75rem;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.4;
  border-left: 2px solid transparent;
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s;
}
.tree-link:hover { color: var(--text); text-decoration: none; }
.tree-link.active { color: var(--accent); border-left-color: var(--accent); }

.tree > .tree-group > .tree-link {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 600;
  padding-top: 1rem;
  padding-bottom: 0.1rem;
}
.tree > .tree-group:first-child > .tree-link { padding-top: 0.3rem; }

h2 {
  margin-top: 1.8rem;
  margin-bottom: 0.9rem;
  color: var(--accent);
  font-size: 1.2rem;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
}

ul {
  margin: 0.8rem 0 1rem 1.4rem;
}

ol {
  margin: 0.8rem 0 1rem 1.4rem;
  padding-left: 0.2rem;
}

li {
  margin-bottom: 0.45rem;
  color: var(--text);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.25rem;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.65rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface-alt);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.85rem;
}

tbody tr:nth-child(even) {
  background: #12161d;
}

code {
  font-family: var(--mono);
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 0.2rem;
  padding: 0.05rem 0.3rem;
}

pre {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  padding: 1rem;
  overflow-x: auto;
  margin: 1rem 0;
}

pre code {
  background: none;
  border: none;
  padding: 0;
}

.meta {
  background: var(--surface-alt);
  border-left: 3px solid var(--accent);
  padding: 1rem;
  border-radius: 0.25rem;
  margin-bottom: 1.5rem;
}

.meta p {
  margin: 0.3rem 0;
}

.nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--border);
  padding-top: 1.2rem;
  margin-top: 2rem;
}

.nav a {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 0.25rem;
  color: var(--accent);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.85rem;
  background: var(--surface-alt);
}

.nav a:hover {
  background: var(--accent);
  color: var(--bg);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

strong {
  color: var(--accent);
  font-weight: 600;
}

#back-to-top {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 0.3rem;
  background: var(--surface);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  transform: translateY(6px);
}

#back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

#back-to-top:hover {
  border-color: var(--accent);
  color: var(--accent);
}

#back-to-top:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Universal hamburger toggle */
.sidebar-toggle {
  display: flex;
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 1100;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0.4rem;
  border: 1px solid var(--border);
  border-radius: 0.3rem;
  background: var(--surface);
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.25rem;
}
.sidebar-toggle:hover {
  border-color: var(--accent);
}
.hamburger-line {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
  transform-origin: center;
}
.sidebar-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.sidebar-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}
.sidebar-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}
/* Sidebar backdrop for mobile overlay */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 5;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.sidebar-backdrop.visible {
  opacity: 1;
}
@media (max-width: 900px) {
  .command-palette { left: 0; }
  .right-rail {
    right: 1rem;
    bottom: 1rem;
  }
  .search-launcher,
  #back-to-top {
    width: 2.25rem;
    height: 2.25rem;
  }
  .search-tip-toast {
    right: 0.75rem;
    left: 0.75rem;
    bottom: 3.6rem;
  }
  .sidebar-backdrop {
    display: block;
  }
  
  /* Mobile: Stack layout vertically */
  .site-layout {
    flex-direction: column;
  }
  
  /* Mobile: Sidebar becomes overlay */
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    z-index: 20;
    transform: translateX(-100%);
    box-shadow: 2px 0 20px rgba(0, 0, 0, 0.4);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .sidebar.collapsed {
    transform: translateX(-100%);
    width: var(--sidebar-width);
  }
  
  main { 
    padding: 1.5rem 1rem;
    max-width: none;
  }
}

@media (max-width: 600px) {
  main { padding: 1rem 0; }
  .nav { flex-wrap: wrap; }
}

/* Landing page specific styles (from former index-styles.css) */
:root {
  --accent-dark: #d97706;
}

section {
  margin-bottom: 3rem;
}

section > h2 {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--border);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.abstract {
  background: var(--surface-alt);
  border-left: 3px solid var(--accent);
  padding: 1.5rem;
  border-radius: 0.25rem;
  margin-bottom: 2.5rem;
}

.abstract p {
  margin-bottom: 1rem;
  color: var(--text);
}

.abstract p:last-child {
  margin-bottom: 0;
}

.doc-section {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 0.25rem;
}

.doc-group {
  margin-bottom: 3rem;
}

.doc-group:last-child {
  margin-bottom: 0;
}

.doc-group-heading {
  color: var(--accent);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.doc-group-intro {
  color: var(--muted);
  margin-bottom: 1.25rem;
  line-height: 1.7;
  max-width: 72ch;
}

.doc-section h3 {
  color: var(--accent);
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.doc-section .doc-type {
  display: inline-block;
  background: var(--bg);
  color: var(--muted);
  padding: 0.25rem 0.75rem;
  border-radius: 0.2rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  margin-bottom: 0.75rem;
}

.doc-section p {
  margin-bottom: 0.75rem;
  color: var(--muted);
  line-height: 1.7;
}

.doc-section p:last-child {
  margin-bottom: 0;
}

.doc-section ul {
  margin: 0.75rem 0 0.75rem 1.5rem;
  color: var(--muted);
}

.doc-section li {
  margin-bottom: 0.5rem;
}

.doc-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.doc-link {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--bg);
  border: 1px solid var(--accent);
  color: var(--accent);
  text-decoration: none;
  border-radius: 0.2rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  transition: all 0.2s ease;
}

.doc-link:hover {
  background: var(--accent);
  color: var(--bg);
}

.code-inline {
  font-family: var(--mono);
  background: var(--bg);
  padding: 0.2rem 0.4rem;
  border-radius: 0.2rem;
  color: var(--accent);
}

.model-section {
  background: var(--surface-alt);
  border: 2px solid var(--accent);
  padding: 2rem;
  border-radius: 0.25rem;
  text-align: center;
}

.model-section p {
  color: var(--muted);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.cta-button {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  padding: 0.75rem 2rem;
  font-size: 1rem;
  border-radius: 0.25rem;
  text-decoration: none;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.cta-button:hover {
  background: var(--accent-dark);
}

.standards {
  background: var(--surface-alt);
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 0.25rem;
}

.standards-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

.standard-tag {
  background: var(--bg);
  color: var(--accent);
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 0.25rem;
  font-family: var(--mono);
  font-size: 0.9rem;
  text-decoration: none;
  display: inline-block;
  transition: all 0.2s ease;
}

a.standard-tag:hover {
  background: var(--accent);
  color: var(--bg);
}

footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  margin-top: 3rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

footer p {
  margin-bottom: 0.5rem;
}

.reading-path {
  background: var(--surface);
  border-left: 4px solid var(--accent);
  padding: 1.5rem;
  border-radius: 0.25rem;
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.path-card {
  display: block;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  text-decoration: none;
  color: var(--accent);
  transition: background 0.15s, border-color 0.15s;
}

.path-card:hover {
  background: var(--surface-alt);
  border-color: var(--accent);
  text-decoration: none;
}

.path-card p {
  margin: 0.5rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Subtitle, tagline, description for landing page */
.subtitle {
  font-size: 1.25rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.tagline {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

.tagline a {
  color: inherit;
  text-decoration: none;
}

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

.description {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text);
  margin-bottom: 1rem;
  font-weight: 400;
  margin-top: 1rem;
}

@media (max-width: 900px) {
  .subtitle {
    font-size: 1rem;
  }
}

/* Technical specification page styling */
body.tech-spec {
  font-size: 14px;
}

body.tech-spec header {
  padding: 1.5rem;
}

body.tech-spec h1 {
  font-size: 1.8rem;
}

body.tech-spec h2 {
  font-size: 1.1rem;
}
/* Table of Contents - Right Sidebar */
.toc-sidebar .toc {
  font-size: 0.8125rem;
  line-height: 1.5;
}

.toc-sidebar .toc-header {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.75rem;
}

.toc-sidebar .toc-title {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0;
}

.toc-sidebar .toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc-sidebar .toc-list li {
  margin: 0;
}

.toc-sidebar .toc-h2 + .toc-h3,
.toc-sidebar .toc-h3 + .toc-h2 {
  margin-top: 0.125rem;
}

.toc-sidebar .toc-link {
  display: block;
  padding: 0.375rem 0.5rem;
  color: var(--text);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.12s, border-color 0.12s, background-color 0.12s;
  border-radius: 0 4px 4px 0;
}

.toc-sidebar .toc-link:hover {
  color: var(--accent);
  text-decoration: none;
  background: var(--surface-hover, rgba(255,255,255,0.03));
}

.toc-sidebar .toc-link.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--surface-hover, rgba(255,255,255,0.03));
  font-weight: 500;
}

/* H3 headings are indented */
.toc-sidebar .toc-h3 .toc-link {
  padding-left: 1rem;
  font-size: 0.75rem;
  color: var(--muted);
}

.toc-sidebar .toc-h3 .toc-link:hover,
.toc-sidebar .toc-h3 .toc-link.active {
  color: var(--accent);
}

/* Mobile TOC */
.toc-mobile-toggle {
  display: none;
  position: fixed;
  bottom: 6.25rem;
  right: 1rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--surface);
  border: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  cursor: pointer;
  z-index: 100;
  align-items: center;
  justify-content: center;
}

.toc-mobile-drawer {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-height: 60vh;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-radius: 12px 12px 0 0;
  padding: 1.5rem;
  z-index: 99;
  transform: translateY(100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
}

.toc-mobile-drawer.open {
  transform: translateY(0);
}

.toc-mobile-drawer .toc {
  max-height: none;
  padding: 0;
}

.toc-mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 98;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.toc-mobile-overlay.open {
  opacity: 1;
}

@media (max-width: 1100px) {
  /* Hide TOC sidebar on smaller screens */
  .toc-sidebar {
    display: none;
  }

  /* Show mobile TOC toggle */
  .toc-mobile-toggle {
    display: flex;
  }

  .toc-mobile-drawer,
  .toc-mobile-overlay {
    display: block;
  }
}

@media (max-width: 900px) {
  .toc-mobile-toggle {
    bottom: 5.75rem;
  }
}