.card { width: 200px; height: 200px; perspective: 1000px; } .card-inner { width: 100%; height: 100%; transform-style: preserve-3d; transition: transform 0.5s; } .card:hover .card-inner { transform: rotateY(180deg); } .card-front, .card-back { width: 100%; height: 100%; position: absolute; backface-visibility: hidden; } .card-back { transform: rotateY(180deg); }