.video{position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;margin-bottom:50px}.video iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:0}.welcome-session .side-heading{margin-bottom:20px}.welcome-session #sidebar .side-title{margin:0}.welcome-session #sidebar.large-sidebar{width:290px}@media (max-width:768px){.welcome-session #sidebar.large-sidebar{width:100%}}