body {
    background-color: #1e1e1e;
    font-family: Arial, sans-serif;
    color: white;
    margin: 0;
    padding: 0;
    text-align: center;
}

.cta {
    display: block;
    background-color: #d60000;
    color: white;
    text-align: center;
    padding: 30px 10px;
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
    border-radius: 5px;
    margin: 20px auto;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transition: background-color 0.3s ease;
    width: 90%;
    max-width: 600px;
}

.cta:hover {
    background-color: #a80000;
}

.banner {
    width: 90%;
    max-width: 600px;
    display: block;
    margin: 10px auto;
    border-radius: 10px;
}