rinatoptimus

.cell.cell-flip:hover .cell__container, .cell.cell-reverse .cell__container {
	-webkit-transform: rotateY(180deg);
	        transform: rotateY(180deg);
}

.test {
  min-width: 100px;
  min-height: 100px;
  border: 1px solid red;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}