.share-window:after,.share-window:before{position:absolute;content:" ";width:0;height:0;bottom:100%;left:20%}.share-window:after{border:10px solid transparent;border-bottom-color:#f9fbff;margin-left:-10px}.share-window:before{border:11px solid transparent;border-bottom-color:#1e7fd9;margin-left:-11px}