.iframe-container {
    position: relative;
    overflow: hidden;
    padding-top: 100%;
}
.iframe-container iframe {
    position: absolute;
    top: 0;
    border: 0;
    height:100%;
    width: 100%;
}
.iframe1604{
    max-height: 870px;
}
hr.thick {
            height: 5px;
            background-color: black;
            border: none;
        }