*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;display:flex;align-items:center;justify-content:center}.container{background:#fff;padding:3rem;border-radius:20px;box-shadow:0 20px 40px #0000001a;text-align:center;max-width:400px;width:90%}h1{font-size:3rem;color:#333;margin-bottom:1rem;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}p{color:#666;font-size:1.1rem;margin-bottom:2rem;line-height:1.6}button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:1rem 2rem;font-size:1.1rem;border-radius:50px;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #667eea4d}button:hover{transform:translateY(-2px);box-shadow:0 6px 20px #667eea66}button:active{transform:translateY(0)}#message{margin-top:1.5rem;font-size:1.2rem;color:#667eea;font-weight:600;min-height:1.5rem;transition:opacity .3s ease}@media (max-width: 480px){.container{padding:2rem}h1{font-size:2.5rem}}