:root { color-scheme: light dark; --bg: #f4f5f7; --fg: #0b0f15; --muted: #5b6472; --accent: #2f6fed; }
@media (prefers-color-scheme: dark) { :root { --bg: #0b0f15; --fg: #e8ecf2; --muted: #9aa4b2; --accent: #7fb0ff; } }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: var(--bg); color: var(--fg);
       font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; padding: 24px; }
main { max-width: 32rem; }
.brand { font-weight: 700; letter-spacing: .02em; color: var(--accent); margin: 0 0 1.5rem; }
h1 { font-size: 1.75rem; line-height: 1.2; margin: 0 0 .75rem; }
p { color: var(--muted); margin: 0; }
a { color: var(--accent); }