:root { --bg: #ffffff; --fg: #1a1a1c; --muted: #5c5c66; --accent: #e8672a; --card: #f4f4f6; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0e0e0f; --fg: #f2f2f4; --muted: #a0a0aa; --accent: #ff8a4c; --card: #1a1a1d; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 1.8rem; margin: 0 0 4px; }
h2 { font-size: 1.25rem; margin-top: 2rem; }
h3 { font-size: 1.05rem; margin-top: 1.4rem; }
a { color: var(--accent); }
.muted { color: var(--muted); font-size: 0.9rem; }
.lang { display: flex; gap: 12px; margin: 12px 0 24px; }
.card { background: var(--card); border-radius: 12px; padding: 16px 20px; margin: 16px 0; }
hr { border: 0; border-top: 1px solid var(--card); margin: 48px 0; }
nav.top { display: flex; gap: 16px; flex-wrap: wrap; font-weight: 600; margin-bottom: 24px; }
ul { padding-left: 1.2rem; }