.card-inner {
  transform-style: preserve-3d;
  transition: transform 0.999s;
}

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

.card-front,
.card-back {
  backface-visibility: hidden;
}

.card-front {
  transform: rotateY(0deg);
}

.card-back {
  transform: rotateY(180deg);
}

@media (min-width: 1000px) {
  .flex-custom-1000{
    flex-direction: row;
  }
}

@media (max-width: 1000px) {
  .flex-custom-1000{
    flex-direction: column;
  }
  .flex-custom-1000 div{
    max-width: none;
  }
  .flex-custom-1000 img{
    max-width: none;
    width: 90%;
  }
}