:root{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#e5e7eb;background:#111827;line-height:1.5;font-weight:400}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#0f172a,#111827 60%,#1f2937)}#root{width:100%}.app{width:min(540px,calc(100vw - 2rem));margin:0 auto;padding:2rem;border-radius:18px;background:#111827cc;border:1px solid rgba(148,163,184,.2);box-shadow:0 20px 50px #0f172a80;text-align:center}h1{margin-top:0;margin-bottom:1rem;font-size:clamp(2rem,4vw,2.5rem)}p{font-size:1.1rem;margin:0}