body {
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  color: white;
  font-family: Arial, sans-serif;
  text-align: center;
  margin: 0;
  padding: 20px;
}

#game-board {
  display: grid;
  grid-template-columns: repeat(4, 100px);
  gap: 10px;
  justify-content: center;
  margin-top: 40px;
}

.card {
  width: 100px;
  height: 100px;
  background: #444;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  cursor: pointer;
  transition: transform 0.3s, background 0.3s;
}

.card.flipped {
  background: white;
  color: black;
  transform: rotateY(180deg);
}

#status {
  margin-top: 20px;
  font-size: 1.2rem;
}