:root { color-scheme: light dark; --fg: #1a1a1a; --muted: #666; --bg: #fafafa; --accent: #2b5797; }
@media (prefers-color-scheme: dark) { :root { --fg: #e8e8e8; --muted: #9a9a9a; --bg: #121212; --accent: #7aa7e8; } }
* { box-sizing: border-box; }
body { margin: 0; font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; color: var(--fg); background: var(--bg); }
main { max-width: 42rem; margin: 0 auto; padding: 3rem 1.25rem 4rem; }
h1 { font-size: 1.9rem; margin: 0 0 .25rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 .5rem; }
.sub { color: var(--muted); margin: 0 0 2rem; }
a { color: var(--accent); }
nav { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid rgba(128,128,128,.3); color: var(--muted); font-size: .9rem; }
nav a { margin-right: 1rem; }