#game-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

#cards-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.card {
    width: 100px;
    height: 100px;
    margin: 10px;
    background-color: #ddd;
    cursor: pointer;
    transition: transform 0.3s;
    border-radius: 5px;
}

.card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: none;
}

.card.flipped img {
    display: block;
}

.card.flipped {
    transform: rotateY(180deg);
}

#message {
    margin-top: 20px;
    font-size: 24px;
}

#restart-button {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 18px;
    border-radius: 5px;
}