:root { color-scheme: light dark; --fg: #1a1a1a; --bg: #fafafa; --muted: #6b7280; --line: #e5e7eb; }
@media (prefers-color-scheme: dark) { :root { --fg: #e8e8e8; --bg: #16181c; --line: #2a2e35; } }
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif; color: var(--fg); background: var(--bg); }
header { display: flex; align-items: baseline; gap: .6rem; padding: .9rem 1.4rem; border-bottom: 1px solid var(--line); }
header .env { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; }
main { max-width: 60rem; margin: 0 auto; padding: 1.6rem 1.4rem; }
h1 { font-size: 1.4rem; margin: 0 0 .8rem; }
a { color: inherit; }