body {
    font-family: Arial, sans-serif;
    background: #f0f0f0;
    text-align: center;
    margin: 0;
    padding: 0;
}

header {
    background: #333;
    color: #fff;
    padding: 20px;
    font-size: 2em;
}

main {
    padding: 20px;
}

iframe {
    margin: 20px 0;
    border: 2px solid #333;
}

h2 {
    margin-bottom: 30px;
}

h3 {
    margin-top: 40px;
    color: #555;
}

footer {
    background: #333;
    color: #fff;
    padding: 10px;
    position: fixed;
    width: 100%;
    bottom: 0;
}