:root { color-scheme: light dark; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; font: 18px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; background: #f8f8f6; color: #0f1f1c; }
main { padding: 24px; text-align: center; }
h1 { font-size: 2rem; margin: 0 0 12px; }
p { margin: 4px 0; }
@media (prefers-color-scheme: dark) { body { background: #0c1114; color: #f2f4f3; } }