body {
    font-family: Arial, sans-serif;
    margin: 40px;
    background-color: #f4f6f9;
    color: #333;
}

header {
    margin-bottom: 30px;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #111;
    color: white;
    border: none;
    cursor: pointer;
}

footer {
    margin-top: 40px;
}