body {
    background-image: url(https://i.ibb.co/hRbxdzcr/Microfilm-Background.png);
    background-size: cover;
    background-attachment: fixed;
    justify-content: center;
    text-align: center;
    font-weight: bold;
    font-size: 10pt;
    width:100%;
    overflow: hidden;
    height:auto;
    align-content: center;
}
body, html {
    height: 100%;
}
iframe {
    margin-top: 50px;
}