:root { color-scheme: light dark; --bg: #fff; --fg: #14181f; --link: #0b5fd6; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f1319; --fg: #e8ecf2; --link: #7db2ff; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 18px/1.5 system-ui, sans-serif; }
main { max-width: 40rem; margin: 0 auto; padding: 4rem 16px; }
a { color: var(--link); }