.game_section {
    width: 80vw;
    max-width: 420px;
    margin: 30px auto;
    padding: 20px;
    border-radius: 20px;
    background: linear-gradient(145deg, #111, #000);
    border: 4px solid gold;
    box-shadow: 0 0 30px gold;
    text-align: center;
    color: #fff;
}
.game-container {
  margin-top: 20px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 80px);
  gap: 10px;
  justify-content: center;
}

.card {
  width: 80px;
  height: 80px;
  background: #444;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  cursor: pointer;
  border-radius: 10px;
}

.card.flipped {
  background: #fff;
  color: #000;
}

.card.matched {
  background: #4caf50;
  color: #fff;
  cursor: default;
}

button {
  margin: 10px;
  padding: 10px 20px;
  cursor: pointer;
}