body {
    font-family: Arial, sans-serif;
    text-align: center;
    background: #f3f3f3;
    color: #333;
}
header {
    background: #ffd700;
    padding: 40px;
}
.cta {
    background: #28a745;
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    display: inline-block;
    margin-top: 20px;
}
footer {
    margin-top: 50px;
    font-size: 14px;
    color: #777;
}