body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background-color: #2c3e50;
  color: white;
  font-family: Arial, sans-serif;
}

h1 {
  margin-bottom: 20px;
}

.game-board {
  display: grid;
  grid-template-columns: repeat(4, 100px);
  grid-gap: 10px;
}

.card {
  width: 100px;
  height: 100px;
  background-color: #ccf0f1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  cursor: pointer;
  border-radius: 8px;
}

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

#reset-button {
  margin-top: 20px;
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  border: none;
  border-radius: 5px;
  background-color: #e74c3c;
  color: white;
}