:root { color-scheme: dark; font-family: system-ui, sans-serif; background:#111827; color:#e5e7eb; }
body { min-height:100vh; display:grid; place-items:center; margin:0; }
main { width:min(64rem,calc(100% - 2rem)); background:#1f2937; border:1px solid #374151; border-radius:1rem; padding:2rem; box-shadow:0 1rem 4rem #0008; }
button { padding:.9rem 1rem; border:0; border-radius:.6rem; background:#60a5fa; color:#08111f; font-weight:700; cursor:pointer; }
pre { white-space:pre-wrap; color:#fca5a5; min-height:1.5rem; }
small { color:#9ca3af; }
code { color:#93c5fd; }