:root { color-scheme: dark; font-family: system-ui, sans-serif; }
body { display: grid; min-height: 100vh; margin: 0; place-items: center; background: #111827; color: #f9fafb; }
main { max-width: 42rem; padding: 2rem; text-align: center; }
h1 { margin-bottom: 0.75rem; font-size: clamp(2rem, 6vw, 4rem); }
p { color: #9ca3af; font-size: 1.125rem; }