.embed-responsive{display:block;overflow:hidden;padding:0;position:relative;width:100%}.embed-responsive embed,.embed-responsive iframe,.embed-responsive object,.embed-responsive video{border:0;bottom:0;height:100%;left:0;position:absolute;top:0;width:100%}.embed-responsive-1by1{padding-bottom:100%}.embed-responsive-4by3{padding-bottom:75%}.embed-responsive-16by9{padding-bottom:56.25%}.embed-responsive-21by9{padding-bottom:42.85714286%}