.curtain-container{position:fixed;inset:0;width:100%;height:100%;z-index:9999;display:flex;pointer-events:none;overflow:hidden}.curtain{width:50%;height:100%;background:black;transition:transform 2s ease-in-out;will-change:transform}.left,.right{transform:translateX(0)}.open-left{transform:translateX(-100%)}.open-right{transform:translateX(100%)}