.iframe-container {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    -webkit-overflow-scrolling: touch;
    overflow: auto;
}

.iframe-container iframe {
    width: 100%;
    height: 100%;
    border: 0;
}

@media screen and (min-width: 1025px) {
    .iframe-container iframe {
        position: fixed;
    }
}