.section--embed {position: relative;margin-bottom: 1em;}.section--embed>div {width: 100%;padding-bottom: calc(100% * 9 / 16);background-color: #efefef;}.section--embed iframe {position: absolute;top: 0;left: 0;width: 100%;height: 100%;background-color: #efefef;}.section--embed .fb-video {position: absolute;}