.flip-card {
  width: 100%;
  height: 100%;
  perspective: 1000px;
}

.flip-card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.999s;
}

.flip-card:hover .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
}

.flip-card-front {
  color: #fff;
  display: flex;
  align-items: center;
  border-radius: 10px;
  justify-content: center;
  font-size: 24px;
  transform: rotateY(0deg);
}

.flip-card-back {
  color: #fff;
  display: flex;
  align-items: center;
  border-radius: 10px;
  justify-content: center;
  font-size: 24px;
  transform: rotateY(180deg);
}