body {
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  background-color: #f0f0f0;
}

.game-container {
  display: grid;
  grid-template-columns: repeat(3, 150px);
  grid-gap: 20px;
}

.card {
  width: 150px;
  height: 200px;
  perspective: 1000px;
}

.card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s;
}

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

.card-front,
.card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 20px;
  color: white;
  border-radius: 10px;
}

.card-front {
  background-color: #3498db;
}

.card-back {
  background-color: #e74c3c;
  transform: rotateY(180deg);
}