*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: system-ui, sans-serif; background: #f8f8f6; color: #111; min-height: 100vh; }
@media (prefers-color-scheme: dark) { body { background: #111; color: #f0f0ee; } }