.cell.cell-flip:hover .cell__container, .cell.cell-reverse .cell__container {
-webkit-transform: rotateY(180deg);
transform: rotateY(180deg);
}
$('.first,.second').on('click', toggleClass('active'));
.test {
min-width: 100px;
min-height: 100px;
border: 1px solid red;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}