:root { color-scheme: light dark; --bg: #f4f6f9; --fg: #14202e; --muted: #5b6878; --accent: #3c638e; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f1a26; --fg: #e8eef5; --muted: #9aa8b8; --accent: #8fb3dc; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.55 -apple-system, system-ui, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 16px; }
h1 { font-size: 32px; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
p, li { color: var(--fg); }
small, .muted { color: var(--muted); }
a { color: var(--accent); }