:root { color-scheme: light dark; --bg: #f7f9fc; --fg: #14171c; --muted: #5b6370; --link: #0a7fd6; --line: #dde3ea; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0e1116; --fg: #e8ecf1; --muted: #9aa4b1; --link: #5cb8ff; --line: #262c35; }
}
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 1.8em; line-height: 1.2; }
h2 { font-size: 1.2em; margin-top: 2em; }
a { color: var(--link); }
hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }
.muted, .lang { color: var(--muted); }