body{background-color:#f8f9fa;justify-content:center;align-items:center;height:100vh;margin:0;font-family:Pretendard,-apple-system,BlinkMacSystemFont,system-ui,Roboto,sans-serif;display:flex}.container{text-align:center;background-color:#fff;border-radius:20px;width:90%;max-width:400px;padding:3rem;box-shadow:0 10px 30px #0000000d}h1{color:#333;margin-bottom:1rem}p{color:#666;margin-bottom:2rem}button{color:#fff;cursor:pointer;background-color:#007bff;border:none;border-radius:10px;padding:12px 24px;font-size:1rem;font-weight:600;transition:all .2s;box-shadow:0 4px 6px #007bff33}button:hover{background-color:#0056b3;transform:translateY(-2px);box-shadow:0 6px 12px #007bff4d}button:active{transform:translateY(0)}#message{color:#28a745;min-height:1.5rem;margin-top:1.5rem;font-weight:500}