body {
  font-family: 'Comic Sans MS', cursive, sans-serif;
  background-color: #e8f7f5;
  text-align: center;
  padding: 20px;
}

h1 {
  color: #2EC4B6;
}

#game-board {
  display: grid;
  grid-template-columns: repeat(4, 100px);
  gap: 15px;
  justify-content: center;
  margin: 20px auto;
}

.card {
  width: 100px;
  height: 100px;
  background-color: #FFBF00;
  border: 2px solid #FFA500;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  cursor: pointer;
  font-size: 14px;
  color: white;
  user-select: none;
  transition: transform 0.3s;
}

.card.flipped {
  background-color: #2EC4B6;
}

.card.matched {
  background-color: #FF6B6B;
  cursor: default;
}

#message {
  margin-top: 20px;
  font-size: 1.2em;
  color: #006400;
}

#restart-btn {
  margin-top: 15px;
  padding: 10px 20px;
  background-color: #2EC4B6;
  color: white;
  border: none;
  border-radius: 5px;
  font-size: 1em;
  cursor: pointer;
}

#restart-btn:hover {
  background-color: #29b3a6;
}