body{margin:0;font-family:system-ui,sans-serif;background:#0f172a;color:#f8fafc}.app-shell{min-height:100vh;display:grid;place-items:center;padding:2rem}.hero-card{max-width:32rem;padding:2rem;border-radius:1rem;background:#0f172ae6;box-shadow:0 24px 80px #0f172a66;text-align:center}.hero-card h1{margin:0 0 1rem;font-size:clamp(2rem,4vw,3rem)}.hero-card p{margin:0;line-height:1.75;color:#cbd5e1}