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

:root {
  --bg: #0a0a0f;
  --bg-card: #111118;
  --bg-card-hover: #16161f;
  --border: #1e1e2a;
  --text: #e4e4e7;
  --text-dim: #8b8b95;
  --text-bright: #fafafa;
  --accent: #22d3ee;
  --accent-dim: rgba(34,211,238,0.12);
  --green: #4ade80;
  --purple: #a78bfa;
  --orange: #fb923c;
  --red: #f87171;
  --radius: 12px;
}

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.mono { font-family: 'JetBrains Mono', monospace; }

/* ── Nav ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  backdrop-filter: blur(16px);
  background: rgba(10,10,15,0.8);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1100px; margin: 0 auto;
  padding: 1rem 2rem;
  display: flex; align-items: center; justify-content: space-between;
}
.logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.3rem; font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.logo span { color: var(--text-dim); }
nav a {
  color: var(--text-dim); text-decoration: none; font-size: 0.9rem;
  transition: color 0.2s;
}
nav a:hover { color: var(--text); }
nav a:focus-visible,
.sidebar a:focus-visible,
.doc-content a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}
.nav-links { display: flex; gap: 1.5rem; align-items: center; }

/* ── Layout ── */
.docs-layout {
  max-width: 1100px; margin: 0 auto;
  padding: 6rem 2rem 4rem;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 3rem;
}

/* ── Sidebar ── */
.sidebar {
  position: sticky;
  top: 5rem;
  min-width: 0;
  max-height: calc(100vh - 6rem);
  overflow-y: auto;
  padding-right: 1rem;
}
.sidebar::-webkit-scrollbar { width: 3px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.sidebar h4 {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 0.6rem;
  margin-top: 1.5rem;
}
.sidebar h4:first-child { margin-top: 0; }
.sidebar a {
  display: block;
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  text-decoration: none;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
  margin-bottom: 0.1rem;
}
.sidebar a:hover { color: var(--text); background: var(--bg-card); }
.sidebar a.active {
  color: var(--accent);
  background: var(--accent-dim);
  font-weight: 500;
}

/* ── Content ── */
.doc-content {
  min-width: 0;
}
.doc-content h1 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-bright);
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.doc-content > h1 + p {
  color: #a1a1aa;
  font-size: 1.08rem;
  line-height: 1.75;
  max-width: 72ch;
  margin-bottom: 2rem;
}
.doc-content .subtitle {
  color: var(--text-dim);
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
}
.doc-content h2 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-bright);
  margin-top: 3rem;
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}
.doc-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-bright);
  margin-top: 2rem;
  margin-bottom: 0.8rem;
}
.doc-content h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-top: 1.5rem;
  margin-bottom: 0.6rem;
}
.doc-content p {
  margin-bottom: 1rem;
  line-height: 1.7;
}
.doc-content a {
  color: var(--accent);
  text-decoration: none;
}
.doc-content a:hover { text-decoration: underline; }
.doc-content p a,
.doc-content li a {
  text-decoration: underline;
  text-underline-offset: 0.16em;
}
.doc-content ul, .doc-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}
.doc-content li {
  margin-bottom: 0.3rem;
  line-height: 1.6;
}

/* ── Code Blocks ── */
.doc-content pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--text);
  overflow-x: auto;
  margin-bottom: 1.5rem;
}
.doc-content code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85em;
}
.doc-content p code, .doc-content li code {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: var(--accent);
  font-size: 0.82em;
}
.doc-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text);
  font-size: 1rem;
}
.source-reference {
  overflow-wrap: anywhere;
  word-break: break-word;
}
.source-reference code {
  white-space: normal;
  overflow-wrap: anywhere;
}
.doc-content pre .kw { color: var(--purple); }
.doc-content pre .fn { color: var(--accent); }
.doc-content pre .str { color: var(--green); }
.doc-content pre .cmt { color: #4a4a5a; font-style: italic; }
.doc-content pre .num { color: var(--orange); }

/* ── Tables ── */
.doc-content table {
  width: 100%;
  display: block;
  overflow-x: auto;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
}
.doc-content th {
  text-align: left;
  padding: 0.6rem 1rem;
  border-bottom: 2px solid var(--border);
  color: var(--text-dim);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.doc-content td {
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.doc-content tr:hover td { background: var(--bg-card); }
.doc-content tbody { width: 100%; }

/* ── Cards (landing) ── */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.2rem;
  margin-top: 2rem;
}
.doc-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-decoration: none;
  transition: border-color 0.3s, background 0.3s;
}
.doc-card:hover {
  border-color: rgba(34,211,238,0.3);
  background: var(--bg-card-hover);
  text-decoration: none;
}
.doc-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 0.4rem;
}
.doc-card p {
  color: var(--text-dim);
  font-size: 0.85rem;
  line-height: 1.5;
  margin: 0;
}

/* ── Blockquote ── */
.doc-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.8rem 1.2rem;
  margin-bottom: 1.5rem;
  background: var(--accent-dim);
  border-radius: 0 8px 8px 0;
  color: var(--text);
  font-size: 0.9rem;
}
.doc-content blockquote p { margin: 0; }

/* ── Prev/Next ── */
.page-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  gap: 1rem;
}
.page-nav a {
  display: block;
  padding: 1rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  flex: 1;
  transition: border-color 0.2s;
}
.page-nav a:hover { border-color: rgba(34,211,238,0.3); }
.page-nav .label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 0.3rem;
}
.page-nav .title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent);
}
.page-nav .next { text-align: right; }

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  margin-top: 4rem;
}
footer { color: var(--text-dim) !important; }
footer a { text-decoration: underline !important; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .docs-layout {
    grid-template-columns: 1fr;
    padding: 5rem 1.2rem 3rem;
  }
  .sidebar {
    position: static;
    max-height: none;
    display: flex;
    flex-wrap: wrap;
    overflow-x: visible;
    gap: 0.3rem;
    padding: 0;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    width: 100%;
    max-width: calc(100vw - 2.4rem);
  }
  .sidebar h4 { display: none; }
  .sidebar a {
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
    white-space: nowrap;
  }
  .doc-content h1 { font-size: 1.6rem; }
  .page-nav { flex-direction: column; }
  .doc-content pre { font-size: 0.75rem; padding: 1rem; }
  .nav-inner { padding: 0.8rem 1.2rem; }
  .nav-links { gap: 0.8rem; }
  .nav-links a:nth-child(3),
  .nav-links a:nth-child(4) { display: none; }
}