/* =========================================================================
   Ariadne docs — design system
   Palette inspired by Ariadne's thread: deep navy + copper/gold accent.
   ========================================================================= */

:root {
  --c-bg:          #fbfaf7;
  --c-bg-alt:      #f3efe7;
  --c-surface:     #ffffff;
  --c-text:        #1a2332;
  --c-text-muted:  #5a6677;
  --c-text-soft:   #7d8899;
  --c-border:      #e3ddd0;
  --c-border-soft: #efeae0;

  --c-navy:        #061e37;
  --c-navy-deep:   #02152c;
  --c-navy-soft:   #142d4a;

  --c-steel:       #4a6a8c;
  --c-steel-soft:  #6b88a8;
  --c-steel-deep:  #2e4868;

  --c-gold:        #d8b058;
  --c-gold-soft:   #e6c882;
  --c-gold-deep:   #b8923e;
  --c-thread:      #d8b058;

  --c-note:        #2e6fb5;
  --c-note-bg:     #e8f1fb;
  --c-warn:        #b8923e;
  --c-warn-bg:     #fbf3dc;
  --c-tip:         #2f8a5d;
  --c-tip-bg:      #e6f4ec;
  --c-danger:      #c0392b;
  --c-danger-bg:   #fce9e6;

  --c-code-bg:     #0f1f30;
  --c-code-text:   #e6edf3;
  --c-code-inline-bg: #eef1f6;
  --c-code-inline-text: #2e4868;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  --radius:    8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(13, 27, 42, 0.06);
  --shadow:    0 2px 8px rgba(13, 27, 42, 0.08);
  --shadow-lg: 0 8px 24px rgba(13, 27, 42, 0.12);

  --header-h: 60px;
  --sidebar-w: 260px;
  --content-max: 880px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --c-bg:          #0f1620;
    --c-bg-alt:      #141d28;
    --c-surface:     #1a2533;
    --c-text:        #e6ecf2;
    --c-text-muted:  #9aa8b8;
    --c-text-soft:   #7a8696;
    --c-border:      #28354a;
    --c-border-soft: #1f2a3a;

    --c-note-bg:     #14283f;
    --c-warn-bg:     #3a2a14;
    --c-tip-bg:      #14301f;
    --c-danger-bg:   #3a1a16;

    --c-code-bg:     #0a121e;
    --c-code-inline-bg: #233148;
    --c-code-inline-text: #e09257;
  }
}

/* -------------------------------------------------------------------------
   Reset / base
   ------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--c-gold-deep); text-decoration: none; }
a:hover { color: var(--c-gold-deep); text-decoration: underline; }

h1, h2, h3, h4, h5, h6 {
  color: var(--c-text);
  font-weight: 600;
  line-height: 1.25;
  margin: 1.6em 0 0.6em;
  scroll-margin-top: calc(var(--header-h) + 16px);
}
h1 { font-size: 2.25rem; margin-top: 0.4em; letter-spacing: -0.02em; }
h2 {
  font-size: 1.6rem;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--c-border-soft);
  letter-spacing: -0.01em;
}
h3 { font-size: 1.25rem; }
h4 { font-size: 1.05rem; color: var(--c-text-muted); text-transform: uppercase; letter-spacing: 0.04em; }

p { margin: 0 0 1em; }
strong { color: var(--c-text); font-weight: 600; }
hr { border: 0; border-top: 1px solid var(--c-border-soft); margin: 2em 0; }

/* Anchored heading links */
.anchor {
  margin-left: 0.4em;
  opacity: 0;
  color: var(--c-text-soft);
  text-decoration: none;
  transition: opacity 0.15s;
}
h2:hover .anchor, h3:hover .anchor, h4:hover .anchor { opacity: 1; }

/* -------------------------------------------------------------------------
   Header
   ------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: var(--c-steel);
  border-bottom: 2px solid var(--c-gold);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  max-width: 1280px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.01em;
}
.brand:hover { color: var(--c-gold); text-decoration: none; }
.brand-icon {
  display: inline-block;
  width: 30px;
  height: 30px;
  object-fit: contain;
}
.brand-name-img {
  display: inline-block;
  height: 24px;
  width: auto;
  object-fit: contain;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.primary-nav a {
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.95rem;
  padding: 8px 14px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.primary-nav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.15);
  text-decoration: none;
}
.primary-nav a.active {
  color: var(--c-navy);
  background: var(--c-gold);
}
.primary-nav a.gh {
  margin-left: 8px;
  padding: 7px 14px;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

/* -------------------------------------------------------------------------
   Page layout
   ------------------------------------------------------------------------- */
.page {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  gap: 48px;
  padding: 32px 24px 64px;
}
.page.no-sidebar { grid-template-columns: 1fr; max-width: 1080px; }

.sidebar {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  align-self: start;
  max-height: calc(100vh - var(--header-h) - 32px);
  overflow-y: auto;
  padding-right: 8px;
  font-size: 0.92rem;
}
.sidebar h5 {
  margin: 0 0 10px;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-text-soft);
  font-weight: 700;
}
.sidebar ul { list-style: none; margin: 0 0 20px; padding: 0; }
.sidebar li { margin: 0; }
.sidebar a {
  display: block;
  padding: 6px 12px;
  border-radius: 6px;
  color: var(--c-text-muted);
  border-left: 2px solid transparent;
}
.sidebar a:hover {
  color: var(--c-text);
  background: var(--c-bg-alt);
  text-decoration: none;
}
.sidebar a.active {
  color: var(--c-gold-deep);
  background: var(--c-bg-alt);
  border-left-color: var(--c-gold);
  font-weight: 600;
}

.content {
  min-width: 0;
  max-width: var(--content-max);
}
.content > :first-child { margin-top: 0; }

/* -------------------------------------------------------------------------
   Hero (landing)
   ------------------------------------------------------------------------- */
.hero {
  background: linear-gradient(135deg, var(--c-navy) 0%, var(--c-navy-soft) 100%);
  color: #fff;
  padding: 72px 24px 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(212, 168, 106, 0.12), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(201, 123, 58, 0.10), transparent 45%);
  pointer-events: none;
}
.hero-inner { max-width: 800px; margin: 0 auto; position: relative; }
.hero-mark {
  display: block;
  width: 140px;
  height: 140px;
  margin: 0 auto 18px;
  object-fit: contain;
  filter: drop-shadow(0 6px 24px rgba(0, 0, 0, 0.35))
          drop-shadow(0 0 18px rgba(212, 168, 106, 0.25));
}
.hero h1 {
  color: #fff;
  font-size: 3rem;
  margin: 0 0 12px;
  letter-spacing: -0.025em;
}
.hero .tagline {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 28px;
  line-height: 1.45;
}
.hero .badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 0 0 32px;
}
.hero .badges img { height: 22px; }
.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  transition: transform 0.1s, box-shadow 0.15s, background 0.15s;
  border: 1px solid transparent;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: var(--c-gold);
  color: var(--c-navy);
  box-shadow: 0 2px 6px rgba(216, 176, 88, 0.4);
}
.btn-primary:hover { background: var(--c-gold-soft); color: var(--c-navy); }
.btn-ghost {
  background: transparent;
  color: rgba(255, 255, 255, 0.92);
  border-color: rgba(255, 255, 255, 0.3);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}

/* -------------------------------------------------------------------------
   Cards
   ------------------------------------------------------------------------- */
.card-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin: 28px 0;
}
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--c-gold);
}
.card-icon {
  display: inline-flex;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--c-steel), var(--c-gold));
  color: var(--c-navy);
  border-radius: 8px;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 14px;
}
.card h3 { margin: 0 0 8px; font-size: 1.1rem; }
.card p { color: var(--c-text-muted); margin: 0 0 14px; font-size: 0.95rem; flex: 1; }
.card a.card-link {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--c-gold-deep);
}
.card a.card-link::after { content: " →"; transition: margin-left 0.15s; }
.card:hover a.card-link::after { margin-left: 4px; }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 28px 0;
}
.split-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  overflow: hidden;
}
.split-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--c-gold);
}
.split-card.contributors::before {
  background: linear-gradient(90deg, var(--c-steel), var(--c-gold));
}
.split-card h2 { border: 0; margin: 0 0 8px; font-size: 1.4rem; padding: 0; }
.split-card p { color: var(--c-text-muted); }
.split-card ul { padding-left: 18px; margin: 12px 0; }
.split-card ul li { margin-bottom: 6px; }

@media (max-width: 720px) {
  .split { grid-template-columns: 1fr; }
}

/* -------------------------------------------------------------------------
   Code
   ------------------------------------------------------------------------- */
code, pre {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}
:not(pre) > code {
  background: var(--c-code-inline-bg);
  color: var(--c-code-inline-text);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}
pre {
  background: var(--c-code-bg);
  color: var(--c-code-text);
  padding: 18px 20px;
  border-radius: var(--radius);
  overflow-x: auto;
  line-height: 1.55;
  margin: 1em 0 1.5em;
  position: relative;
  box-shadow: var(--shadow-sm);
}
pre code { background: transparent; color: inherit; padding: 0; font-size: 0.88rem; }

.code-block { position: relative; }
.copy-btn {
  position: absolute;
  top: 10px; right: 10px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 5px;
  padding: 4px 10px;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s, background 0.15s, color 0.15s;
}
.code-block:hover .copy-btn { opacity: 1; }
.copy-btn:hover { background: rgba(255, 255, 255, 0.15); color: #fff; }
.copy-btn.copied { color: var(--c-gold); border-color: var(--c-gold); }

/* Minimal syntax tokens (applied by lightweight tokenizer in site.js) */
.tok-kw  { color: #ff9580; }
.tok-str { color: #c3e88d; }
.tok-num { color: #f78c6c; }
.tok-com { color: #6a7a8a; font-style: italic; }
.tok-fn  { color: #82aaff; }
.tok-typ { color: #ffcb6b; }
.tok-pun { color: #cdd6e0; }

/* -------------------------------------------------------------------------
   Tables
   ------------------------------------------------------------------------- */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2em 0;
  font-size: 0.94rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
}
thead {
  background: var(--c-bg-alt);
}
th {
  text-align: left;
  font-weight: 600;
  color: var(--c-text);
  padding: 11px 14px;
  border-bottom: 2px solid var(--c-border);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--c-border-soft);
  vertical-align: top;
}
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--c-bg-alt); }
td code, th code { font-size: 0.85rem; }

.table-scroll { overflow-x: auto; }

/* -------------------------------------------------------------------------
   Callouts
   ------------------------------------------------------------------------- */
.callout {
  margin: 1.5em 0;
  padding: 14px 18px 14px 48px;
  border-radius: var(--radius);
  border-left: 4px solid;
  background: var(--c-bg-alt);
  position: relative;
}
.callout::before {
  position: absolute;
  left: 16px;
  top: 14px;
  font-size: 1.1rem;
  font-weight: 700;
  width: 22px;
  text-align: center;
}
.callout p:last-child { margin-bottom: 0; }
.callout.note  { background: var(--c-note-bg);   border-color: var(--c-note); }
.callout.note::before  { content: "ⓘ"; color: var(--c-note); }
.callout.warn  { background: var(--c-warn-bg);   border-color: var(--c-warn); }
.callout.warn::before  { content: "⚠"; color: var(--c-warn); }
.callout.tip   { background: var(--c-tip-bg);    border-color: var(--c-tip); }
.callout.tip::before   { content: "✓"; color: var(--c-tip); }
.callout.danger { background: var(--c-danger-bg); border-color: var(--c-danger); }
.callout.danger::before { content: "✕"; color: var(--c-danger); }

/* -------------------------------------------------------------------------
   Page header (per content page)
   ------------------------------------------------------------------------- */
.page-header {
  border-bottom: 1px solid var(--c-border);
  margin-bottom: 28px;
  padding-bottom: 18px;
}
.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-thread);
  margin-bottom: 8px;
}
.page-header h1 { margin: 0 0 8px; font-size: 2rem; }
.page-header .lede { font-size: 1.1rem; color: var(--c-text-muted); margin: 0; }

/* -------------------------------------------------------------------------
   Lists
   ------------------------------------------------------------------------- */
ul, ol { padding-left: 26px; }
li { margin: 4px 0; }
li > p { margin: 4px 0; }

/* Definition-like list */
dl.kv { display: grid; grid-template-columns: max-content 1fr; gap: 8px 18px; margin: 1em 0; }
dl.kv dt { font-weight: 600; color: var(--c-text); }
dl.kv dd { margin: 0; color: var(--c-text-muted); }

/* -------------------------------------------------------------------------
   Diagram (architecture page) — hand-styled boxes
   ------------------------------------------------------------------------- */
.diagram {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin: 24px 0;
}
.trait-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}
.trait-box {
  background: var(--c-bg-alt);
  border: 1px solid var(--c-border);
  border-left: 4px solid var(--c-steel);
  border-radius: 6px;
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--c-text);
  min-width: 320px;
  text-align: center;
}
.trait-box.main {
  background: var(--c-navy);
  color: #fff;
  border-color: var(--c-navy);
  border-left-color: var(--c-gold);
  font-size: 1rem;
}
.trait-arrow {
  width: 2px;
  height: 14px;
  background: var(--c-steel);
  margin: 0;
  position: relative;
}
.trait-arrow::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--c-steel);
}
.support-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 24px;
}
.support-box {
  background: var(--c-bg-alt);
  border: 1px solid var(--c-border);
  border-radius: 6px;
  padding: 12px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.support-box .label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--c-text-soft);
  margin-top: 4px;
  font-weight: normal;
}

/* Flow steps */
.flow {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 1.5em 0;
}
.flow li {
  counter-increment: step;
  position: relative;
  padding: 14px 16px 14px 56px;
  margin: 0 0 10px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}
.flow li::before {
  content: counter(step);
  position: absolute;
  left: 14px;
  top: 14px;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--c-gold);
  color: var(--c-navy);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}
.flow li strong { display: block; margin-bottom: 4px; color: var(--c-text); }
.flow li p { margin: 0; color: var(--c-text-muted); font-size: 0.94rem; }

/* -------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------- */
.site-footer {
  background: var(--c-navy-deep);
  color: rgba(255, 255, 255, 0.7);
  padding: 36px 24px;
  font-size: 0.9rem;
  border-top: 2px solid var(--c-gold);
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}
.site-footer a { color: var(--c-gold); }
.site-footer a:hover { color: #fff; }

/* -------------------------------------------------------------------------
   Responsive
   ------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .page { grid-template-columns: 1fr; gap: 24px; padding: 24px 20px 48px; }
  .sidebar {
    position: static;
    max-height: none;
    border-bottom: 1px solid var(--c-border);
    padding-bottom: 16px;
    margin-bottom: 8px;
  }
  .hero h1 { font-size: 2.25rem; }
  .hero { padding: 56px 20px 64px; }
  .hero-mark { width: 96px; height: 96px; margin-bottom: 14px; }
  .primary-nav a { padding: 8px 10px; font-size: 0.9rem; }
  .brand-name, .brand-name-img { display: none; }
}
@media (max-width: 520px) {
  h1 { font-size: 1.7rem; }
  h2 { font-size: 1.3rem; }
  pre { font-size: 0.78rem; padding: 14px; }
}