.scene {
  width: 800px;
  height: 350px;
  margin: 40px 0;
  /* perspective: 600px */;
}

.card {
  width: 670px; 
  height: 320px;
  transition: transform 1s;
  transform-style: preserve-3d;
  cursor: pointer;
  position: relative;
}

.card.is-flipped{
  width: 670px; 
  height: 320px;
  transform: rotateY(180deg);
}

.card__face {
  position: absolute;
  width: 670px; 
  height: 320px;
  line-height: 260px;
  color: white;
  text-align: center;
  font-weight: bold;
  font-size: 40px;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.front {
  background: transparent;
}

.back {
  background: transparent;
  transform: rotateY(180deg);
}