body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #111;
    color: white;
    text-align: center;
}

main {
    padding: 60px 20px;
}

h1 {
    font-size: 48px;
    margin-bottom: 10px;
}

a {
    display: inline-block;
    margin: 10px;
    padding: 12px 18px;
    color: white;
    border: 1px solid white;
    text-decoration: none;
}

a:hover {
    background: white;
    color: #111;
}

iframe {
    max-width: 100%;
    margin-top: 20px;
}