body{margin:0;padding:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:#d3d3d3;display:flex;justify-content:center;align-items:center;height:100vh}div{text-align:center;background-color:#f3f0f0;padding:40px;border-radius:12px;box-shadow:0 4px 8px #0000001a}button{margin:10px;padding:10px 20px;font-size:16px;font-weight:700;color:#fff;background-color:#007bff;border:none;border-radius:8px;cursor:pointer;transition:background-color .3s ease}button:hover{background-color:#0056b3}h1{margin:15px 0;font-size:24px;color:#333}