:root{color:#111827;background:#f3f4f6;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}*{box-sizing:border-box}body{margin:0}.app-shell{min-height:100vh;display:grid;place-items:center;padding:1.5rem}.card{width:min(640px,100%);background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:2rem;box-shadow:0 14px 30px #11182714}.eyebrow{margin:0;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#4b5563;font-size:.75rem}h1{margin:.5rem 0 .75rem;font-size:clamp(1.5rem,4vw,2.25rem)}p{margin:0;line-height:1.6;color:#374151}