/* ============================================================
   SCARAB-RUNTIME DOCUMENTATION THEME
   Industrial Terminal × Art Deco — amber-on-obsidian
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=Josefin+Sans:wght@300;400;600;700&family=IBM+Plex+Mono:wght@400;500;600&family=Playfair+Display:wght@400;700&display=swap');

/* ── Core Palette ─────────────────────────────────────────── */
:root {
  --scarab-obsidian:   #0d0e0f;
  --scarab-deep:       #111214;
  --scarab-panel:      #161819;
  --scarab-surface:    #1c1e20;
  --scarab-border:     #2a2d30;
  --scarab-border-dim: #1e2022;
  --scarab-amber:      #e8a830;
  --scarab-amber-dim:  #b07820;
  --scarab-amber-glow: rgba(232, 168, 48, 0.12);
  --scarab-amber-pale: rgba(232, 168, 48, 0.06);
  --scarab-gold:       #f0c040;
  --scarab-rust:       #c0531a;
  --scarab-teal:       #2aafa0;
  --scarab-teal-dim:   #1a6f68;
  --scarab-text:       #c8c0b0;
  --scarab-text-dim:   #7a746a;
  --scarab-text-faint: #444240;
  --scarab-code-bg:    #0a0b0c;
  --scarab-white:      #e8e2d8;
  --font-mono:         'IBM Plex Mono', 'Share Tech Mono', monospace;
  --font-display:      'Josefin Sans', sans-serif;
  --font-body:         'Playfair Display', Georgia, serif;
  --transition:        150ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Global Reset & Base ──────────────────────────────────── */
.coal {
  background-color: var(--scarab-obsidian) !important;
}

html {
  font-size: 18px !important;
}

body {
  background-color: var(--scarab-obsidian) !important;
  color: var(--scarab-text) !important;
  font-family: var(--font-body) !important;
  font-size: 18px !important;
  line-height: 1.75 !important;
}

/* Scanline overlay — atmospheric texture */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.04) 2px,
    rgba(0, 0, 0, 0.04) 4px
  );
}

/* ── Sidebar ──────────────────────────────────────────────── */
.sidebar {
  background-color: var(--scarab-deep) !important;
  border-right: 1px solid var(--scarab-border) !important;
  font-family: var(--font-mono) !important;
  font-size: 12px !important;
}

/* Scarab sigil: top of sidebar */
.sidebar .sidebar-scrollbox::before {
  content: '◈ SCARAB-RUNTIME';
  display: block;
  font-family: var(--font-display) !important;
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--scarab-amber) !important;
  padding: 18px 16px 14px;
  border-bottom: 1px solid var(--scarab-border);
  margin-bottom: 8px;
}

.sidebar-scrollbox {
  padding: 0 0 32px !important;
}

/* Section headers in sidebar */
.chapter li.part-title {
  font-family: var(--font-display) !important;
  font-size: 9px !important;
  font-weight: 700 !important;
  letter-spacing: 0.3em !important;
  text-transform: uppercase !important;
  color: var(--scarab-amber-dim) !important;
  padding: 20px 16px 6px !important;
  margin-top: 4px !important;
  border-top: 1px solid var(--scarab-border-dim) !important;
}

.chapter li.part-title:first-child {
  border-top: none !important;
}

/* Sidebar links */
.chapter li a {
  color: var(--scarab-text-dim) !important;
  font-family: var(--font-mono) !important;
  font-size: 11.5px !important;
  letter-spacing: 0.03em !important;
  padding: 3px 16px 3px 22px !important;
  display: block !important;
  transition: color var(--transition), background-color var(--transition) !important;
  text-decoration: none !important;
  white-space: nowrap !important;
  overflow: hidden !important;
  text-overflow: ellipsis !important;
  border-left: 2px solid transparent !important;
  position: relative;
}

.chapter li a::before {
  content: '›';
  position: absolute;
  left: 12px;
  color: var(--scarab-text-faint);
  transition: color var(--transition);
}

.chapter li a:hover {
  color: var(--scarab-amber) !important;
  background-color: var(--scarab-amber-pale) !important;
  border-left-color: var(--scarab-amber-dim) !important;
}

.chapter li a:hover::before {
  color: var(--scarab-amber) !important;
}

.chapter li.chapter-item.expanded > a,
.chapter li.active > a {
  color: var(--scarab-amber) !important;
  background-color: var(--scarab-amber-glow) !important;
  border-left-color: var(--scarab-amber) !important;
  font-weight: 500 !important;
}

.chapter li.active > a::before {
  content: '▶' !important;
  color: var(--scarab-amber) !important;
}

/* Sub-items indentation */
.chapter li a.toggle + ol li a {
  padding-left: 36px !important;
}

/* ── Top Navigation Bar ───────────────────────────────────── */
#menu-bar {
  background-color: var(--scarab-deep) !important;
  border-bottom: 1px solid var(--scarab-border) !important;
  height: 48px !important;
}

#menu-bar .menu-title {
  font-family: var(--font-display) !important;
  font-weight: 600 !important;
  font-size: 13px !important;
  letter-spacing: 0.2em !important;
  text-transform: uppercase !important;
  color: var(--scarab-amber) !important;
}

#menu-bar .icon-button,
#menu-bar .right-buttons a {
  color: var(--scarab-text-dim) !important;
  transition: color var(--transition) !important;
}

#menu-bar .icon-button:hover,
#menu-bar .right-buttons a:hover {
  color: var(--scarab-amber) !important;
  background-color: var(--scarab-amber-pale) !important;
  border-radius: 3px !important;
}

/* ── Main Content Area ────────────────────────────────────── */
.content {
  background-color: var(--scarab-obsidian) !important;
}

.content main {
  max-width: 820px !important;
  padding: 48px 56px 80px !important;
}

/* Page title — Josefin display treatment */
.content main h1:first-child {
  font-family: var(--font-display) !important;
  font-size: 2.4rem !important;
  font-weight: 700 !important;
  letter-spacing: 0.08em !important;
  text-transform: uppercase !important;
  color: var(--scarab-white) !important;
  margin-bottom: 0.2em !important;
  padding-bottom: 0.5em !important;
  border-bottom: 1px solid var(--scarab-border) !important;
  position: relative;
}

.content main h1:first-child::after {
  content: '';
  display: block;
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 80px;
  height: 2px;
  background: linear-gradient(90deg, var(--scarab-amber), transparent);
}

/* Section headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display) !important;
  color: var(--scarab-white) !important;
  letter-spacing: 0.05em !important;
}

h2 {
  font-size: 1.35rem !important;
  font-weight: 600 !important;
  text-transform: uppercase !important;
  letter-spacing: 0.12em !important;
  margin-top: 2.5em !important;
  padding-top: 0.8em !important;
  border-top: 1px solid var(--scarab-border-dim) !important;
  color: var(--scarab-amber) !important;
}

h3 {
  font-size: 1.05rem !important;
  font-weight: 600 !important;
  letter-spacing: 0.08em !important;
  color: var(--scarab-gold) !important;
  margin-top: 1.8em !important;
}

h4 {
  font-size: 0.9rem !important;
  font-weight: 400 !important;
  letter-spacing: 0.12em !important;
  text-transform: uppercase !important;
  color: var(--scarab-teal) !important;
  margin-top: 1.4em !important;
}

/* Body text */
p {
  color: var(--scarab-text) !important;
  font-size: 1rem !important;
  line-height: 1.8 !important;
  margin: 0.9em 0 !important;
}

/* ── Links ────────────────────────────────────────────────── */
a {
  color: var(--scarab-teal) !important;
  text-decoration: none !important;
  border-bottom: 1px solid var(--scarab-teal-dim) !important;
  transition: color var(--transition), border-color var(--transition) !important;
}

a:hover {
  color: var(--scarab-amber) !important;
  border-bottom-color: var(--scarab-amber) !important;
}

/* ── Inline Code ──────────────────────────────────────────── */
code {
  font-family: var(--font-mono) !important;
  font-size: 0.82em !important;
  color: var(--scarab-amber) !important;
  background-color: var(--scarab-code-bg) !important;
  border: 1px solid var(--scarab-border) !important;
  border-radius: 2px !important;
  padding: 1px 5px 2px !important;
  letter-spacing: 0.02em !important;
}

/* ── Code Blocks ──────────────────────────────────────────── */
pre {
  background-color: var(--scarab-code-bg) !important;
  border: 1px solid var(--scarab-border) !important;
  border-left: 3px solid var(--scarab-amber-dim) !important;
  border-radius: 0 !important;
  padding: 20px 24px !important;
  margin: 1.5em 0 !important;
  position: relative;
  overflow-x: auto !important;
}

/* Corner decoration on code blocks */
pre::before {
  content: '//';
  position: absolute;
  top: 8px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--scarab-text-faint);
  letter-spacing: 0.1em;
}

pre code {
  font-family: var(--font-mono) !important;
  font-size: 0.83rem !important;
  color: #c8c0a8 !important;
  background: transparent !important;
  border: none !important;
  padding: 0 !important;
  letter-spacing: 0.03em !important;
  line-height: 1.6 !important;
}

/* Syntax highlight overrides — amber palette */
.hljs-keyword,
.hljs-selector-tag,
.hljs-built_in { color: #e8a830 !important; }
.hljs-string,
.hljs-attr { color: #90c080 !important; }
.hljs-comment { color: #505850 !important; font-style: italic !important; }
.hljs-number,
.hljs-literal { color: #a080c8 !important; }
.hljs-function,
.hljs-title { color: #70b8d0 !important; }
.hljs-type,
.hljs-class { color: #d0a060 !important; }
.hljs-variable,
.hljs-name { color: #c8c0a8 !important; }
.hljs-tag { color: #e87040 !important; }
.hljs-attribute { color: #e8a830 !important; }
.hljs-meta { color: #688878 !important; }
.hljs-section,
.hljs-selector-id { color: var(--scarab-amber) !important; }

/* Copy button */
.copy-button {
  background: var(--scarab-surface) !important;
  border: 1px solid var(--scarab-border) !important;
  color: var(--scarab-text-dim) !important;
  font-family: var(--font-mono) !important;
  font-size: 10px !important;
  letter-spacing: 0.1em !important;
  border-radius: 0 !important;
  padding: 3px 8px !important;
  transition: color var(--transition), border-color var(--transition) !important;
}

.copy-button:hover {
  color: var(--scarab-amber) !important;
  border-color: var(--scarab-amber-dim) !important;
}

/* ── Tables ───────────────────────────────────────────────── */
table {
  width: 100% !important;
  border-collapse: collapse !important;
  font-family: var(--font-mono) !important;
  font-size: 0.82rem !important;
  margin: 1.5em 0 !important;
  border: 1px solid var(--scarab-border) !important;
}

thead {
  background-color: var(--scarab-panel) !important;
  border-bottom: 1px solid var(--scarab-amber-dim) !important;
}

thead th {
  font-family: var(--font-display) !important;
  font-size: 9.5px !important;
  font-weight: 700 !important;
  letter-spacing: 0.22em !important;
  text-transform: uppercase !important;
  color: var(--scarab-amber) !important;
  padding: 10px 14px !important;
  text-align: left !important;
  border: none !important;
}

tbody tr {
  border-bottom: 1px solid var(--scarab-border-dim) !important;
  transition: background-color var(--transition) !important;
}

tbody tr:last-child {
  border-bottom: none !important;
}

tbody tr:hover {
  background-color: var(--scarab-amber-pale) !important;
}

tbody td {
  padding: 9px 14px !important;
  color: var(--scarab-text) !important;
  border: none !important;
  vertical-align: top !important;
  line-height: 1.5 !important;
}

tbody td code {
  font-size: 0.78em !important;
}

/* Striped rows — subtle */
tbody tr:nth-child(even) {
  background-color: rgba(255,255,255,0.018) !important;
}

/* ── Blockquotes ──────────────────────────────────────────── */
blockquote {
  border-left: 3px solid var(--scarab-amber-dim) !important;
  background-color: var(--scarab-amber-pale) !important;
  margin: 1.5em 0 !important;
  padding: 12px 20px !important;
  color: var(--scarab-text-dim) !important;
  font-style: italic !important;
}

blockquote p {
  margin: 0 !important;
  color: var(--scarab-text-dim) !important;
}

/* ── Lists ────────────────────────────────────────────────── */
ul, ol {
  color: var(--scarab-text) !important;
  padding-left: 1.4em !important;
}

ul li::marker {
  color: var(--scarab-amber-dim) !important;
}

ol li::marker {
  color: var(--scarab-amber-dim) !important;
  font-family: var(--font-mono) !important;
  font-size: 0.9em !important;
}

li {
  margin: 0.3em 0 !important;
  line-height: 1.7 !important;
}

/* Strong / em */
strong {
  color: var(--scarab-white) !important;
  font-weight: 700 !important;
}

em {
  color: var(--scarab-gold) !important;
  font-style: italic !important;
}

/* ── Search ───────────────────────────────────────────────── */
#searchbar {
  background-color: var(--scarab-surface) !important;
  border: 1px solid var(--scarab-border) !important;
  border-radius: 0 !important;
  color: var(--scarab-text) !important;
  font-family: var(--font-mono) !important;
  font-size: 12px !important;
  letter-spacing: 0.05em !important;
  caret-color: var(--scarab-amber) !important;
}

#searchbar:focus {
  border-color: var(--scarab-amber-dim) !important;
  outline: none !important;
  box-shadow: 0 0 0 2px var(--scarab-amber-glow) !important;
}

.searchresults-outer {
  background-color: var(--scarab-panel) !important;
  border: 1px solid var(--scarab-border) !important;
}

.searchresults-header {
  font-family: var(--font-display) !important;
  font-size: 10px !important;
  letter-spacing: 0.2em !important;
  text-transform: uppercase !important;
  color: var(--scarab-amber-dim) !important;
}

.searchresults li {
  border-bottom: 1px solid var(--scarab-border-dim) !important;
}

.searchresults li a {
  color: var(--scarab-teal) !important;
  font-family: var(--font-mono) !important;
  font-size: 13px !important;
  border-bottom: none !important;
}

.searchresults li a:hover {
  color: var(--scarab-amber) !important;
}

/* ── Previous / Next Navigation ──────────────────────────── */
.nav-chapters {
  font-family: var(--font-display) !important;
  font-size: 11px !important;
  font-weight: 700 !important;
  letter-spacing: 0.18em !important;
  text-transform: uppercase !important;
}

.previous, .next {
  color: var(--scarab-text-dim) !important;
  border-bottom: none !important;
  transition: color var(--transition) !important;
}

.previous:hover, .next:hover {
  color: var(--scarab-amber) !important;
}

/* ── Print mode ───────────────────────────────────────────── */
@media print {
  body::before { display: none; }
}

/* ── Scrollbar styling ────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--scarab-deep);
}
::-webkit-scrollbar-thumb {
  background: var(--scarab-border);
  border-radius: 0;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--scarab-amber-dim);
}

/* ── Horizontal Rules ─────────────────────────────────────── */
hr {
  border: none !important;
  border-top: 1px solid var(--scarab-border) !important;
  margin: 2.5em 0 !important;
  position: relative !important;
}

hr::after {
  content: '◈';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--scarab-obsidian);
  padding: 0 10px;
  color: var(--scarab-amber-dim);
  font-size: 11px;
}

/* ── Warning / Note callout blocks ───────────────────────── */
/* mdBook note boxes injected via > **Note:** */
blockquote strong:first-child {
  color: var(--scarab-amber) !important;
  font-family: var(--font-display) !important;
  font-size: 10px !important;
  letter-spacing: 0.25em !important;
  text-transform: uppercase !important;
}

/* ── Art Deco corner flourish on content area ─────────────── */
.content main::before {
  content: '';
  display: block;
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--scarab-amber), transparent);
  margin-bottom: 40px;
  opacity: 0.6;
}

/* ── Page load fade-in ────────────────────────────────────── */
.content main {
  animation: scarab-fadein 0.35s ease-out both;
}

@keyframes scarab-fadein {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Staggered heading entrance */
h1, h2, h3 {
  animation: scarab-slideup 0.4s ease-out both;
}

h1 { animation-delay: 0.05s; }
h2 { animation-delay: 0.0s; }
h3 { animation-delay: 0.0s; }

@keyframes scarab-slideup {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Selection ────────────────────────────────────────────── */
::selection {
  background-color: rgba(232, 168, 48, 0.22);
  color: var(--scarab-white);
}

/* ── Theme toggle button ──────────────────────────────────── */
#theme-list {
  background-color: var(--scarab-panel) !important;
  border: 1px solid var(--scarab-border) !important;
}

#theme-list button {
  color: var(--scarab-text-dim) !important;
  font-family: var(--font-mono) !important;
  font-size: 12px !important;
}

#theme-list button:hover,
#theme-list button.theme-selected {
  color: var(--scarab-amber) !important;
  background-color: var(--scarab-amber-pale) !important;
}

/* ── Sidebar resize handle ────────────────────────────────── */
.sidebar-resize-indicator {
  background-color: var(--scarab-border) !important;
}

/* ── Mobile adjustments ───────────────────────────────────── */
@media (max-width: 768px) {
  .content main {
    padding: 28px 24px 60px !important;
  }

  .content main h1:first-child {
    font-size: 1.8rem !important;
  }

  table {
    display: block !important;
    overflow-x: auto !important;
  }
}