:root { color-scheme: light dark; --fg: #1d1d1f; --bg: #fff; --muted: #6e6e73; --link: #0a64d8; }
@media (prefers-color-scheme: dark) { :root { --fg: #f5f5f7; --bg: #111; --muted: #a1a1a6; --link: #4da3ff; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 -apple-system, system-ui, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 32px 20px 64px; }
h1 { font-size: 2rem; margin: 0.4em 0; }
h2 { font-size: 1.2rem; margin-top: 1.8em; }
a { color: var(--link); }
.muted { color: var(--muted); }