.curtain-panel{z-index:50;width:50%;height:100vh;transition:transform 2.5s ease-in-out;position:fixed;top:0}.curtain-panel.left{background:url(/images/red-curtain.jpg) 50%/cover no-repeat;left:0;transform:translate(0%)}.curtain-panel.right{background:0 0;right:0;transform:translate(0%)}.curtain-mirror{background:url(/images/red-curtain.jpg) 50%/cover no-repeat;width:100%;height:100%;transform:scaleX(-1)}.curtain-open .curtain-panel.left{transform:translate(-100%)}.curtain-open .curtain-panel.right{transform:translate(100%)}