:root { color-scheme: dark; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: #0b1020; color: #e8ecff; font: 18px/1.5 system-ui, sans-serif; }
main { max-width: 40rem; padding: 2rem; }
code { background: #1a2140; padding: 0.1em 0.4em; border-radius: 4px; }