.lecture img{max-height:300px;float:left;border-radius:3px;margin-right:2em;margin-bottom:2em}.video-container{position:relative;width:100%;height:0;padding-bottom:56.25%}.video iframe{position:absolute;top:0;left:0;width:100%;height:100%}.sidenav{border:1px silver solid;position:fixed;height:calc(100vh - 84px);overflow:auto}.docs-container{padding-right:0rem!important}