:root { color-scheme: light dark; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center;
       font: 16px/1.5 system-ui, -apple-system, sans-serif; background: #f4f4f5; color: #18181b; }
@media (prefers-color-scheme: dark) { body { background: #18181b; color: #f4f4f5; } }
main { text-align: center; padding: 2rem; }
h1 { font-size: 2rem; margin: 0 0 .5rem; }
.ver { font: .85rem ui-monospace, monospace; opacity: .7; }