:root { color-scheme: light dark; --fg: #1d1d1f; --muted: #5f6368; --bg: #ffffff; --link: #0b57d0; }
@media (prefers-color-scheme: dark) { :root { --fg: #e8eaed; --muted: #9aa0a6; --bg: #1f1f1f; --link: #8ab4f8; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 42rem; margin: 0 auto; padding: 3rem 1rem; }
h1 { font-size: 1.75rem; line-height: 1.25; margin: 0 0 .5rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 .5rem; }
p.lead, footer { color: var(--muted); }
a { color: var(--link); }
footer { margin-top: 3rem; font-size: .9rem; }