:root { color-scheme: light dark; --fg: #1a1a1a; --bg: #fafaf7; --muted: #555; --accent: #0b5cad; }
@media (prefers-color-scheme: dark) { :root { --fg: #ececec; --bg: #141414; --muted: #aaa; --accent: #7db7f5; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 18px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 38rem; margin: 0 auto; padding: 4rem 1.25rem; }
h1 { font-size: 2.25rem; margin: 0 0 .25rem; line-height: 1.2; }
.role { color: var(--muted); margin: 0 0 2rem; }
nav { display: flex; gap: 1.25rem; align-items: center; margin-top: 2rem; }
a { color: var(--accent); }
.btn { background: var(--accent); color: var(--bg); padding: .6rem 1.2rem; border-radius: .4rem; text-decoration: none; font-weight: 600; }