body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
    background-color: #f4f4f9;
    color: #333;
}

header {
    background: #6200ee;
    color: white;
    padding: 10px;
    border-radius: 5px;
}

button {
    background: #6200ee;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background: #3700b3;
}

footer {
    margin-top: 20px;
    font-size: 0.8em;
    color: #666;
}