:root {
  --bg: #0c0d10;
  --bg-elev: #16181d;
  --bg-elev-2: #1d2027;
  --fg: #e6e8ec;
  --fg-muted: #8b8f99;
  --accent: #7aa2f7;
  --accent-soft: #2a3550;
  --border: #2a2d35;
  --radius: 10px;
  --maxw: 1100px;
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.site-header {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--border);
}
.site-header .brand {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--fg);
}
.site-header nav {
  display: flex;
  gap: 18px;
  font-size: 0.92rem;
  color: var(--fg-muted);
}
.site-header nav a { color: var(--fg-muted); }
.site-header nav a:hover { color: var(--fg); text-decoration: none; }

.site-footer {
  max-width: var(--maxw);
  margin: 64px auto 24px;
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 0.85rem;
}
.site-footer a { color: var(--fg-muted); }

/* Homepage cards */
.hero {
  padding: 56px 0 24px;
}
.hero h1 {
  font-size: 2rem;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.hero p { color: var(--fg-muted); margin: 0; max-width: 60ch; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin: 32px 0;
}
.card {
  display: block;
  padding: 22px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: inherit;
  transition: border-color 0.15s, background 0.15s;
}
.card:hover {
  border-color: var(--accent);
  background: var(--bg-elev-2);
  text-decoration: none;
}
.card h2 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.card .label {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.card p {
  margin: 6px 0 0;
  color: var(--fg-muted);
  font-size: 0.92rem;
}

/* Section headers */
.section-head {
  margin: 48px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}
.section-head h2 { font-size: 1.15rem; margin: 0; }
.section-head .meta { color: var(--fg-muted); font-size: 0.85rem; }

/* Doc list */
.doc-list { list-style: none; padding: 0; margin: 0; }
.doc-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.doc-list .doc-title { font-weight: 600; }
.doc-list .doc-meta { color: var(--fg-muted); font-size: 0.85rem; }
.doc-list .doc-path {
  font-family: var(--font-mono);
  color: var(--fg-muted);
  font-size: 0.78rem;
}

/* Stub-page banner */
.stub {
  padding: 24px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 24px 0;
}
.stub .badge {
  display: inline-block;
  padding: 2px 8px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 12px;
}