body {
    font-family: Arial, sans-serif;
    background: #f5f5f5;
    margin: 0;
    padding: 0;
    text-align: center;
}

header {
    background: #222;
    color: white;
    padding: 20px;
}

.content {
    margin-top: 40px;
}

button {
    padding: 10px 20px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
}