:root{color:#0f172a;background-color:#f8fafc;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}body{margin:0;min-height:100vh;display:flex;justify-content:center;align-items:center;background:radial-gradient(circle,#fff 0,#e2e8f0 100%)}main{padding:2rem;border-radius:1rem;background:#fff;box-shadow:0 10px 40px rgba(15,23,42,.1);min-width:320px}button{cursor:pointer}