:root { color-scheme: dark; font-family: system-ui, sans-serif; }
body { margin: 0; background: #0a1128; color: #f2f4f8; }
main { max-width: 40rem; margin: 4rem auto; padding: 0 1.5rem; }
h1 { font-weight: 650; letter-spacing: -0.02em; }