:root{color-scheme:light dark}*{box-sizing:border-box}body,html{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:#0b1020;color:#e8ecf8}main{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;padding:2rem;text-align:center}h1{font-size:clamp(2rem,6vw,3.5rem)}h1,p{margin:0}p{color:#9fb0d4;max-width:34rem;line-height:1.6}.card{border:1px solid #22305a;background:#121a33;border-radius:12px;padding:1.25rem 1.5rem}code{background:#1c2648;padding:.15rem .4rem;border-radius:6px;font-size:.95em}