:root {
  --bg: #0b1020;
  --card: #121a2f;
  --accent: #38bdf8;
  --accent2: #a78bfa;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: rgba(148, 163, 184, 0.15);
  --code-bg: #0d1428;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: radial-gradient(ellipse 120% 80% at 50% -20%, #1e3a5f 0%, var(--bg) 55%);
  color: var(--text);
}
.layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid var(--border); }
}
.sidebar {
  background: rgba(18, 26, 47, 0.95);
  border-right: 1px solid var(--border);
  padding: 1.25rem 1rem 2rem;
}
.sidebar h1 {
  font-size: 1.1rem;
  margin: 0 0 0.25rem;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sidebar .back {
  display: inline-block;
  margin-bottom: 1rem;
  font-size: 0.82rem;
  color: var(--accent);
  text-decoration: none;
}
.sidebar .back:hover { text-decoration: underline; }
.nav-group {
  margin-top: 1rem;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.nav a {
  display: block;
  padding: 0.45rem 0.6rem;
  margin: 0.15rem 0;
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.88rem;
}
.nav a:hover { background: rgba(56, 189, 248, 0.1); }
.nav a.active {
  background: rgba(56, 189, 248, 0.18);
  border: 1px solid rgba(56, 189, 248, 0.35);
}
.main {
  padding: 2rem 2.5rem 4rem;
  max-width: 52rem;
}
.loading, .error { color: var(--muted); }
.doc-body h1, .doc-body h2, .doc-body h3 { scroll-margin-top: 1rem; }
.doc-body h1 { font-size: 1.85rem; margin-top: 0; }
.doc-body h2 {
  font-size: 1.25rem;
  margin-top: 2rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
}
.doc-body h3 { font-size: 1.05rem; margin-top: 1.5rem; }
.doc-body p, .doc-body li { line-height: 1.65; color: #cbd5e1; }
.doc-body a { color: var(--accent); }
.doc-body code {
  background: var(--code-bg);
  padding: 0.12rem 0.35rem;
  border-radius: 4px;
  font-size: 0.88em;
}
.doc-body pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.82rem;
}
.doc-body pre code { background: none; padding: 0; }
.doc-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin: 1rem 0;
}
.doc-body th, .doc-body td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.65rem;
  text-align: left;
}
.doc-body th { background: rgba(56, 189, 248, 0.08); }
.doc-body blockquote {
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--accent2);
  background: rgba(167, 139, 250, 0.08);
  border-radius: 0 8px 8px 0;
}
.doc-body .mermaid { margin: 1.5rem 0; text-align: center; }
.privacy-banner {
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid rgba(251, 191, 36, 0.35);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: #fde68a;
}