body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: #222;
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow: hidden;
    height: 100vh;
}

#gameBoard {
    width: 320px;
    height: 400px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(4, 1fr);
    gap: 5px;
    margin: 20px auto;
}

.card {
    background-color: #444;
    border: 1px solid white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    user-select: none;
    height: 75px; /* Set a fixed height */
}

.card.flipped {
    background-color: #666;
}