html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

.iframe-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.iframe-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}