ul.videos{list-style-type:none;margin:3em 0 0 0;padding:0;display:-ms-flexbox;display:-webkit-flex;display:flex;-ms-flex-direction:row;-webkit-flex-direction:row;flex-direction:row;-ms-flex-wrap:wrap;-webkit-flex-wrap:wrap;flex-wrap:wrap;justify-content:flex-start;align-items:stretch}ul.videos li{-ms-flex:0 0 calc((100% - 3em)/4);-webkit-flex:0 0 calc((100% - 3em)/4);flex:0 0 calc((100% - 3em)/4);margin-right:1em;margin-bottom:1em}ul.videos li:nth-child(4n){margin-right:0}ul.videos li iframe{position:absolute;top:0;left:0;width:100%;height:100%}@media screen and (max-width:58em){ul.videos li{-ms-flex:0 0 calc((100% - 2em)/3);-webkit-flex:0 0 calc((100% - 2em)/3);flex:0 0 calc((100% - 2em)/3)}ul.videos li:nth-child(4n){margin-right:1em}ul.videos li:nth-child(3n){margin-right:0}}@media screen and (max-width:36em){ul.videos li{-ms-flex:0 0 calc((100% - 1em)/2);-webkit-flex:0 0 calc((100% - 1em)/2);flex:0 0 calc((100% - 1em)/2)}ul.videos li:nth-child(3n){margin-right:1em}ul.videos li:nth-child(2n){margin-right:0}}