.card_cont {
  -o-transition: all 0.75;
  -ms-transition: all 0.75;
  -moz-transition: all 0.75;
  -webkit-transition: all 0.75;
  transition: all 0.75s;
  -o-backface-visibility: hidden;
  -ms-backface-visibility: hidden;
  -moz-backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  position: absolute;
  top: 0px;
  left: 0px;
  text-align: center;
  background-color: #eee;
}
.card-front {
  z-index: 2;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.card_back {
  width: 100%;
  height: 100%;
  padding: 30px 30px;
  color: #ffffff;
  background-color: #333131;
  z-index: 1;
  margin: 0;
  text-align: center;
  overflow: hidden;
  -o-transform: rotateY(-180deg);
  -ms-transform: rotateY(-180deg);
  -moz-transform: rotateY(-180deg);
  -webkit-transform: rotateY(-180deg);
  transform: rotateY(-180deg);
}

.card:hover .card-front {
  z-index: 1;
  -o-transform: rotateY(180deg);
  -ms-transform: rotateY(180deg);
  -moz-transform: rotateY(180deg);
  -webkit-transform: rotateY(180deg);
  transform: rotateY(180deg);
}

.card:hover .card_back {
  z-index: 2;
  -o-transform: rotateY(0deg);
  -ms-transform: rotateY(0deg);
  -moz-transform: rotateY(0deg);
  -webkit-transform: rotateY(0deg);
  transform: rotateY(0deg);
}

.builderCard .card_cont {
  -o-backface-visibility: visible;
  -ms-backface-visibility: visible;
  -moz-backface-visibility: visible;
  -webkit-backface-visibility: visible;
  backface-visibility: visible;
}