:root { color-scheme: light dark; font-family: system-ui, sans-serif; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: #111827; color: #e5e7eb; }
main { width: min(34rem, calc(100% - 3rem)); padding: 2.5rem; border: 1px solid #374151; border-radius: 1rem; background: #1f2937; }
h1 { margin-top: 0; font-size: 2rem; }
p { margin-bottom: 0; color: #cbd5e1; }