div.tds-iframe {
    position: relative;
    border: 1em solid #fff;
    background: #fff;
    display: -ms-flexbox;
    display: flex;
}

div.tds-iframe iframe {
    border: none;
    width: 1px;
    min-width: 100%;
    max-width: 100%;
    height: 39em;
    overflow: hidden
}