body {
    font-family: Arial, sans-serif;
    background-color: #111;
    color: #fff;
    padding: 2rem;
    text-align: center;
}
button {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 16px;
    background: #28a;
    color: white;
    border: none;
    cursor: pointer;
}