:root {
  --bg: #0a0a0b;
  --panel: #121214;
  --ink: #f4f4f5;
  --muted: #a1a1aa;
  --line: #26262b;
  --accent: #f5c518;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 46rem; margin: 0 auto; padding: 0 1.25rem; }

header {
  border-bottom: 1px solid var(--line);
  padding: 1rem 0;
  position: sticky; top: 0;
  background: rgba(10, 10, 11, 0.92);
  backdrop-filter: blur(8px);
  z-index: 10;
}

header .wrap { display: flex; align-items: center; justify-content: space-between; }

.brand {
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.85rem;
  color: var(--ink);
  text-decoration: none;
}

.brand span { color: var(--accent); }

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.85rem;
  margin-left: 1.25rem;
}

nav a:hover, nav a.active { color: var(--ink); }

main { padding: 3rem 0 4rem; }

.doc {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 2.5rem;
}

.doc h1 {
  font-size: 1.9rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}

.doc .updated { color: var(--muted); font-size: 0.85rem; margin-bottom: 2rem; }

.doc h2 {
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 2.2rem 0 0.6rem;
  font-weight: 600;
}

.doc h2:first-of-type { margin-top: 0; }

.doc p { color: #d4d4d8; margin-bottom: 0.9rem; }
.doc p + p { margin-top: 0.9rem; }

.doc ul, .doc ol { margin: 0 0 1rem 1.4rem; color: #d4d4d8; }
.doc li { margin-bottom: 0.45rem; }

.doc strong { color: var(--ink); }

.callout {
  border-left: 3px solid var(--accent);
  background: rgba(245, 197, 24, 0.06);
  padding: 0.9rem 1.1rem;
  border-radius: 0 8px 8px 0;
  margin: 1.4rem 0;
  font-size: 0.95rem;
}

.hero { text-align: center; padding: 4rem 0 2rem; }
.hero h1 {
  font-size: 2.6rem;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 0.8rem;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { color: var(--muted); max-width: 32rem; margin: 0 auto 2rem; }

.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; max-width: 34rem; margin: 0 auto; }

.card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.4rem;
  text-decoration: none;
  color: var(--ink);
  transition: border-color 0.15s, transform 0.15s;
  text-align: left;
}

.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card .t { font-weight: 650; margin-bottom: 0.3rem; }
.card .d { font-size: 0.85rem; color: var(--muted); }

footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
}

@media (max-width: 560px) {
  .cards { grid-template-columns: 1fr; }
  .doc { padding: 1.5rem; }
  .hero h1 { font-size: 2rem; }
}