:root { color-scheme: light dark; --text: #1d1d1f; --muted: #6e6e73; --bg: #ffffff; --line: #d2d2d7; --link: #0066cc; }
@media (prefers-color-scheme: dark) { :root { --text: #f5f5f7; --muted: #a1a1a6; --bg: #1c1c1e; --line: #3a3a3c; --link: #4da3ff; } }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 1.8em; line-height: 1.2; margin: 0 0 4px; }
h2 { font-size: 1.2em; margin: 32px 0 8px; }
p, li { margin: 0 0 12px; }
.muted { color: var(--muted); }
nav { margin: 0 0 24px; }
a { color: var(--link); }
hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }