.stf__parent {
    position: relative;
    display: block;
    box-sizing: border-box;
    transform: translateZ(0);
    -ms-touch-action: pan-y;
    touch-action: pan-y;
}

.sft__wrapper {
    position: relative;
    width: 100%;
    box-sizing: border-box;
}

.stf__parent canvas {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
}

.stf__block {
    position: absolute;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
    perspective: 2000px;
}

.stf__item {
    display: none;
    position: absolute;
    transform-style: preserve-3d;
}

.stf__outerShadow {
    position: absolute;
    left: 0;
    top: 0;
}

.stf__innerShadow {
    position: absolute;
    left: 0;
    top: 0;
}

.stf__hardShadow {
    position: absolute;
    left: 0;
    top: 0;
}

.stf__hardInnerShadow {
    position: absolute;
    left: 0;
    top: 0;
}