:root { --bg: #f4f2fb; --fg: #0d1117; --muted: #57606a; --card: #fff; --accent: #f5e50a; }
@media (prefers-color-scheme: dark) { :root { --bg: #0d1117; --fg: #f0f6fc; --muted: #9198a1; --card: #161b22; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 48px 16px 80px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
p, li { color: var(--fg); }
.muted { color: var(--muted); font-size: .92rem; }
.card { background: var(--card); border-radius: 16px; padding: 24px; margin-top: 24px; }
mark { background: var(--accent); color: #0d1117; padding: 0 4px; border-radius: 4px; }
a { color: inherit; }
nav { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 32px; font-size: .95rem; }