/*
 * zskills docs — terminal aesthetic.
 * Matches the zot24.com site and the nworth docs: JetBrains Mono + IBM Plex
 * Serif on warm-tinted near-black with an acid-green accent. Overrides every
 * mdbook theme so the site reads the same regardless of which `default-theme`
 * mdbook ships with.
 *
 * NOTE: mdbook sets `html { font-size: 62.5% }` (so 1rem = 10px) by default.
 * We reset it to 100% (1rem = 16px) so our type scale reads correctly and
 * matches the zot24 marketing site.
 */

/* ---- Reset mdbook's font shrinker so rem behaves normally ---- */
html {
  font-size: 100% !important; /* 1rem === 16px */
}

:root,
.light,
.rust,
.coal,
.navy,
.ayu {
  /*
   * Terminal palette — tuned for long-form readability.
   * Trades a 17:1 pure-neutral contrast for a still-AAA-compliant ~13:1 with
   * a hint of warmth, so the page reads as "paper," not "screen off."
   */
  --t-bg: #0b0a09;            /* warm near-black */
  --t-bg-rule: #181614;       /* warm hairline */
  --t-bg-elev: rgba(228, 224, 216, 0.02);
  --t-fg: #dcd9d3;            /* softer, warmer off-white */
  --t-fg-dim: #8e8a82;
  --t-fg-dimmer: #4d4a44;
  --t-accent: #84ff00;
  --t-accent-soft: rgba(132, 255, 0, 0.08);
  --t-accent-glow: rgba(132, 255, 0, 0.18);

  /* mdbook overrides */
  --bg: var(--t-bg);
  --fg: var(--t-fg);

  --sidebar-bg: #08070a;
  --sidebar-fg: var(--t-fg-dim);
  --sidebar-non-existant: var(--t-fg-dimmer);
  --sidebar-active: var(--t-accent);
  --sidebar-spacer: var(--t-bg-rule);

  --scrollbar: var(--t-bg-rule);

  --icons: var(--t-fg-dim);
  --icons-hover: var(--t-accent);

  --links: var(--t-accent);

  --inline-code-color: var(--t-accent);

  --theme-popup-bg: #0e1012;
  --theme-popup-border: var(--t-bg-rule);
  --theme-hover: rgba(132, 255, 0, 0.06);

  --quote-bg: var(--t-bg-elev);
  --quote-border: var(--t-accent);

  --table-border-color: var(--t-bg-rule);
  --table-header-bg: var(--t-bg-rule);
  --table-alternate-bg: rgba(228, 224, 216, 0.015);

  --searchbar-border-color: var(--t-bg-rule);
  --searchbar-bg: #0e1012;
  --searchbar-fg: var(--t-fg);
  --searchbar-shadow-color: rgba(132, 255, 0, 0.12);
  --searchresults-header-fg: var(--t-fg-dim);
  --searchresults-border-color: var(--t-bg-rule);
  --searchresults-li-bg: var(--t-bg-elev);
  --search-mark-bg: var(--t-accent);

  --warning-border: #ffb84d;
}

html,
body {
  background: var(--t-bg);
  color: var(--t-fg);
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace !important;
  font-feature-settings: 'tnum' 1, 'ss01' 1, 'cv11' 1;
  letter-spacing: 0.003em;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--t-accent);
  color: var(--t-bg);
}

/* ---- Top menu bar ---- */
.menu-bar,
.menu-bar > #menu-bar-hover-placeholder {
  background: var(--t-bg);
  border-bottom: 1px solid var(--t-bg-rule);
}

.menu-title {
  font-family: 'JetBrains Mono', monospace !important;
  font-size: 0.95rem !important;
  letter-spacing: 0.06em;
  color: var(--t-fg-dim);
  text-transform: lowercase;
}
.menu-title::before {
  content: 'docs/';
  color: var(--t-fg-dimmer);
}

.icon-button {
  color: var(--t-fg-dim);
  transition: color 200ms;
  font-size: 1.2rem;
}
.icon-button:hover {
  color: var(--t-accent);
}

/* ---- "← zot24.com" link injected by zot24-home.js ---- */
.zot24-home-link {
  display: inline-flex !important;
  align-items: center;
  gap: 0.4rem;
  padding: 0 0.7rem !important;
  font-size: 0.85rem !important;
  font-family: 'JetBrains Mono', monospace !important;
  color: var(--t-fg-dim) !important;
  text-decoration: none !important;
  letter-spacing: 0.02em;
  border-radius: 0;
  transition: color 200ms, background-color 200ms;
}
.zot24-home-link:hover {
  color: var(--t-accent) !important;
  background: var(--theme-hover);
}
.zot24-home-label {
  font-weight: 500;
}
@media (max-width: 480px) {
  .zot24-home-label { display: none; }
}

/* ---- Sidebar ---- */
.sidebar {
  background: var(--sidebar-bg);
  border-right: 1px solid var(--t-bg-rule);
  font-family: 'JetBrains Mono', monospace !important;
  font-size: 0.92rem;
}

.sidebar .sidebar-scrollbox {
  padding: 1.5rem 0.75rem;
}

.sidebar .chapter li {
  margin: 0;
}

.sidebar .chapter li a,
.sidebar .chapter li .chapter-item {
  color: var(--t-fg-dim);
  padding: 0.4em 0.6em;
  font-weight: 400;
  border-radius: 0;
  transition: color 200ms, background-color 200ms;
  font-size: 0.92rem;
  line-height: 1.5;
}

.sidebar .chapter li a:hover {
  background: var(--theme-hover);
  color: var(--t-fg);
  text-decoration: none;
}

.sidebar .chapter li.chapter-item a.active {
  color: var(--t-accent);
  background: var(--t-accent-soft);
  font-weight: 500;
}
.sidebar .chapter li.chapter-item a.active::before {
  content: '> ';
  color: var(--t-fg-dimmer);
}

.sidebar .chapter li.part-title {
  color: var(--t-fg-dimmer) !important;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 500;
  padding: 1.5em 0.6em 0.6em;
}
.sidebar .chapter li.part-title::before { content: '── '; }
.sidebar .chapter li.part-title::after { content: ' ──'; }

.sidebar .chapter .toggle {
  color: var(--t-fg-dimmer);
}

.sidebar .spacer {
  border-top: 1px dashed var(--t-bg-rule);
  background: transparent;
}

.sidebar-scrollbox::-webkit-scrollbar { width: 8px; }
.sidebar-scrollbox::-webkit-scrollbar-track { background: transparent; }
.sidebar-scrollbox::-webkit-scrollbar-thumb { background: var(--t-bg-rule); }

/* ---- Content area ---- */
.content {
  font-family: 'JetBrains Mono', monospace !important;
  font-size: 1rem;
  line-height: 1.75;
}

.content main {
  padding: 0 1rem;
  max-width: 920px;
}

/* Cap the *prose* measure at ~70ch (Bringhurst 45-75ch sweet spot).
   Tables, code, headings, figures keep the full width. */
.content p,
.content ul,
.content ol,
.content blockquote {
  max-width: 70ch;
}

.content h1,
.content h2,
.content h3,
.content h4,
.content h5,
.content h6 {
  font-family: 'JetBrains Mono', monospace !important;
  font-weight: 500 !important;
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin-top: 2em;
  margin-bottom: 0.7em;
  scroll-margin-top: 5rem;
  color: var(--t-fg);
  text-wrap: balance;
}

.content h1 {
  font-size: 2.25rem;
  border-bottom: 1px dashed var(--t-bg-rule);
  padding-bottom: 0.5em;
}
.content h1::before { content: '# '; color: var(--t-fg-dimmer); }

.content h2 {
  font-size: 1.625rem;
  color: var(--t-accent);
}
.content h2::before { content: '## '; color: var(--t-fg-dimmer); }

.content h3 {
  font-size: 1.25rem;
}
.content h3::before { content: '### '; color: var(--t-fg-dimmer); }

.content h4 {
  font-size: 1.05rem;
  color: var(--t-fg-dim);
}
.content h5,
.content h6 {
  font-size: 0.95rem;
  color: var(--t-fg-dim);
  text-transform: lowercase;
  letter-spacing: 0.04em;
}

.content p {
  text-wrap: pretty;
  margin: 1.1em 0;
}

.content a,
.content a:visited {
  color: var(--t-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: rgba(132, 255, 0, 0.4);
  transition: text-decoration-color 200ms;
}
.content a:hover {
  text-decoration-color: var(--t-accent);
}

.content blockquote {
  font-family: 'IBM Plex Serif', Georgia, serif !important;
  font-style: italic;
  font-size: 1.05rem;
  background: var(--t-bg-elev);
  border-left: 2px solid var(--t-accent);
  padding: 0.8em 1em;
  color: var(--t-fg);
  font-feature-settings: 'liga' 1, 'kern' 1;
  letter-spacing: 0;
}

.content hr {
  border: 0;
  border-top: 1px dashed var(--t-bg-rule);
  margin: 2.5em 0;
}

/* Inline code */
.content :not(pre) > code {
  background: var(--t-accent-soft);
  color: var(--t-accent);
  padding: 0.1em 0.4em;
  border-radius: 0;
  font-size: 0.92em;
  font-family: 'JetBrains Mono', monospace !important;
  letter-spacing: 0;
}

/* Code blocks */
.content pre {
  background: #08070a !important;
  border: 1px solid var(--t-bg-rule);
  padding: 1em 1.1em;
  border-radius: 0;
  position: relative;
  overflow-x: auto;
  font-size: 0.9rem;
  max-width: none;
}
.content pre > code {
  font-family: 'JetBrains Mono', monospace !important;
  font-size: 0.9rem;
  line-height: 1.6;
  background: transparent;
  color: var(--t-fg);
  padding: 0;
  letter-spacing: 0;
}

.content pre > .buttons {
  opacity: 0;
  transition: opacity 200ms;
}
.content pre:hover > .buttons {
  opacity: 1;
}
.content .buttons button {
  background: var(--t-bg);
  color: var(--t-fg-dim);
  border: 1px solid var(--t-bg-rule);
  border-radius: 0;
  font-family: 'JetBrains Mono', monospace !important;
  font-size: 0.75rem;
  padding: 0.25em 0.55em;
  transition: color 200ms, border-color 200ms;
}
.content .buttons button:hover {
  color: var(--t-accent);
  border-color: var(--t-accent);
}

/* Tables */
.content table {
  border: 1px solid var(--t-bg-rule);
  border-collapse: collapse;
  font-size: 0.95rem;
}
.content table th {
  background: var(--t-bg-rule);
  color: var(--t-fg);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.6em 0.9em;
  text-align: left;
}
.content table td {
  padding: 0.6em 0.9em;
  border-top: 1px solid var(--t-bg-rule);
}
.content table tr:nth-child(even) td {
  background: var(--table-alternate-bg);
}

/* Lists — terminal arrows for ULs */
.content ul {
  list-style: none;
  padding-left: 1.6em;
}
.content ul > li {
  position: relative;
  margin: 0.35em 0;
}
.content ul > li::before {
  content: '→';
  position: absolute;
  left: -1.5em;
  color: var(--t-accent);
}
.content ul ul > li::before,
.content ul ul ul > li::before { content: '·'; }

.content ol {
  padding-left: 1.8em;
  list-style: decimal;
}
.content ol li { margin: 0.35em 0; }
.content ol li::marker { color: var(--t-fg-dim); }

/* Footer navigation arrows */
.nav-chapters {
  color: var(--t-fg-dim);
  border-radius: 0;
  font-size: 1.5rem;
}
.nav-chapters:hover {
  color: var(--t-accent);
  background: var(--theme-hover);
}

/* Search */
#searchbar {
  background: var(--searchbar-bg);
  color: var(--t-fg);
  border: 1px solid var(--t-bg-rule);
  border-radius: 0;
  font-family: 'JetBrains Mono', monospace !important;
  font-size: 1rem;
  padding: 0.6em 0.9em;
}
#searchbar:focus {
  border-color: var(--t-accent);
  outline: none;
  box-shadow: 0 0 0 1px var(--t-accent), 0 0 18px var(--t-accent-glow);
}

#searchresults-outer {
  font-family: 'JetBrains Mono', monospace !important;
}

#searchresults-header {
  color: var(--t-fg-dimmer);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
}

.searchresults li {
  border-bottom: 1px solid var(--t-bg-rule);
  padding: 0.7em 0;
}
.searchresults li a {
  color: var(--t-fg);
}

mark {
  background: var(--t-accent);
  color: var(--t-bg);
  padding: 0 0.15em;
}

.theme-popup {
  font-family: 'JetBrains Mono', monospace !important;
  font-size: 0.95rem;
}
.theme-popup .theme:hover {
  background: var(--theme-hover);
  color: var(--t-accent);
}

.footnote-definition {
  font-size: 0.9rem;
  color: var(--t-fg-dim);
  border-left: 1px solid var(--t-bg-rule);
  padding-left: 0.8em;
}

.content .mermaid {
  background: var(--t-bg-elev);
  border: 1px solid var(--t-bg-rule);
  padding: 1em;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}