:root { --bg: #ffffff; --fg: #151320; --muted: #5d5a6b; --brand: #5a4bd6; }
@media (prefers-color-scheme: dark) { :root { --bg: #121019; --fg: #f2f1f7; --muted: #a6a3b5; --brand: #8f84f5; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.5 -apple-system, system-ui, sans-serif; }
main { max-width: 520px; margin: 0 auto; padding: 48px 16px; }
h1 { font-size: 28px; margin: 0 0 12px; }
.muted { color: var(--muted); }
a { color: var(--brand); }