:root { color-scheme: light dark; --fg: #111; --muted: #666; --bg: #fff; --accent: #0a7d4f; }
@media (prefers-color-scheme: dark) { :root { --fg: #f2f2f2; --muted: #9a9a9a; --bg: #0c0c0c; --accent: #3ddc97; } }
* { box-sizing: border-box; }
body { margin: 0; font: 17px/1.5 -apple-system, system-ui, sans-serif; color: var(--fg); background: var(--bg); }
main { max-width: 34rem; margin: 0 auto; padding: 4rem 1.5rem; }
h1 { font-size: 2rem; line-height: 1.15; margin: 0 0 1rem; }
h2 { font-size: 1.1rem; margin: 2rem 0 .5rem; }
p, li { color: var(--muted); }
.mark { font-weight: 700; font-size: 1.25rem; color: var(--accent); margin-bottom: 3rem; }
a { color: var(--accent); }