:root { color-scheme: light; font-family: system-ui, sans-serif; color: #1f2937; background: #f8fafc; }
body { display: grid; min-height: 100vh; margin: 0; place-items: center; }
main { width: min(26rem, calc(100% - 2rem)); padding: 2rem; border: 1px solid #cbd5e1; border-radius: 0.75rem; background: white; text-align: center; }
button { padding: 0.6rem 0.9rem; border: 0; border-radius: 0.4rem; color: white; background: #0369a1; cursor: pointer; }
button:hover { background: #075985; }