body {
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #f0f0f0;
}

.game-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 20px;
  perspective: 1000px;
}

.card {
  width: 100px;
  height: 100px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.5s;
  cursor: pointer;
}

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

.card-front,
.card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2em;
  border-radius: 8px;
}

.card-front {
  background: #2196f3;
  color: white;
}

.card-back {
  background: white;
  transform: rotateY(180deg);
  border: 2px solid #2196f3;
}

.stats {
  margin: 20px;
  text-align: center;
}

button {
  padding: 10px 20px;
  font-size: 1em;
  cursor: pointer;
  background: #4caf50;
  color: white;
  border: none;
  border-radius: 4px;
}