:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#0b1220;color:#f8fafc;line-height:1.6}*{box-sizing:border-box}body{margin:0}.app-shell{min-height:100vh;display:flex;justify-content:center;align-items:center;padding:2rem}.hero{max-width:46rem;width:100%;background:#111827;border:1px solid rgba(148,163,184,.15);border-radius:1.5rem;padding:2rem;box-shadow:0 20px 80px #0f172a59}.hero h1{margin:0 0 .75rem;font-size:clamp(2rem,4vw,3.5rem)}.hero p{margin:0 0 1.5rem;color:#cbd5e1}.card{display:grid;gap:1rem}button{background:linear-gradient(135deg,#4f46e5,#0ea5e9);border:none;color:#fff;padding:.9rem 1.4rem;border-radius:.9rem;font-size:1rem;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease}button:hover{transform:translateY(-1px);box-shadow:0 16px 30px #0ea5e940}code{background:#94a3b826;padding:.25rem .5rem;border-radius:.5rem;color:#f8fafc}