.corners-container{position:relative}.corners-container:before,.corners-container:after{content:"";opacity:0;border:0 solid;width:14px;height:14px;transition:opacity .3s;position:absolute}.corners-container:before{border-width:2px 0 0 2px;top:3px;left:3px}.corners-container:after{border-width:2px 2px 0 0;top:3px;right:3px}.corners-container .bottom-corners{pointer-events:none;height:14px;position:absolute;bottom:3px;left:3px;right:3px}.corners-container .bottom-corners:before,.corners-container .bottom-corners:after{content:"";opacity:0;border:0 solid;width:14px;height:14px;transition:opacity .3s;position:absolute}.corners-container .bottom-corners:before{border-width:0 0 2px 2px;bottom:0;left:0}.corners-container .bottom-corners:after{border-width:0 2px 2px 0;bottom:0;right:0}.corners-container:hover:before,.corners-container:hover:after,.corners-container:hover .bottom-corners:before,.corners-container:hover .bottom-corners:after{opacity:1}