:root { --bg: #fff; --fg: #1a1a1a; --muted: #666; --link: #1a56db; }
@media (prefers-color-scheme: dark) { :root { --bg: #111; --fg: #eee; --muted: #999; --link: #7aa2ff; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 system-ui, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 16px; }
h1 { font-size: 1.8rem; margin: 0 0 16px; }
h2 { font-size: 1.15rem; margin: 28px 0 6px; }
a { color: var(--link); }
.muted { color: var(--muted); }