.btn{padding:.5em 1em;border-radius:5px;background-color:#3498db;color:#fff;border:none;outline:none;transition:background-color .3s ease;box-shadow:0 2px 4px #00000026;cursor:pointer;text-transform:uppercase}div{display:flex;justify-content:center;align-items:center;height:100vh;width:100vw;background-color:#f1f1f1;font-family:Arial,sans-serif;text-align:center;color:#333;font-size:2em;transition:background-color .5s ease;cursor:pointer}