:root { --bg: #fbfaf7; --fg: #1d1b18; --muted: #6b665e; --line: #e4e0d8; --link: #1f5f8b; }
@media (prefers-color-scheme: dark) { :root { --bg: #161513; --fg: #ece8e1; --muted: #a39d93; --line: #2e2b27; --link: #7fb6dd; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 64px; }
h1 { font-size: 1.9rem; margin: 0 0 4px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
p, li { color: var(--fg); }
.sub { color: var(--muted); margin: 0 0 28px; }
a { color: var(--link); }
nav { border-top: 1px solid var(--line); margin-top: 40px; padding-top: 16px; font-size: 0.95rem; }
nav a { margin-right: 18px; }