:root { color-scheme: light dark; --bg: #fff; --fg: #1a1a1a; --muted: #666; --link: #1a5fb4; }
@media (prefers-color-scheme: dark) { :root { --bg: #111; --fg: #ededed; --muted: #a0a0a0; --link: #8ab4f8; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main, footer { max-width: 680px; margin: 0 auto; padding: 0 20px; }
main { padding-top: 56px; }
footer { padding-top: 32px; padding-bottom: 48px; font-size: 15px; }
h1 { font-size: 32px; line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 21px; margin: 36px 0 8px; }
h3 { font-size: 17px; margin: 24px 0 4px; }
a { color: var(--link); }
.lead { font-size: 20px; }
.muted { color: var(--muted); font-size: 15px; }