.container {
    text-align: center;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(13, 1fr);
    gap: 5px;
    justify-items: center; 
    justify-content: center; 
    margin-bottom: 10px;
}

@media (max-width: 1020px) {
    .card-grid {
        grid-template-columns: repeat(8, 1fr); 
    }
}

@media (max-width: 768px) {
    .card-grid {
        grid-template-columns: repeat(6, 1fr); 
    }
}

@media (max-width: 480px) {
    .card-grid {
        grid-template-columns: repeat(6, 1fr);
    }
    .card {
        width: 8px;
        height: 12px;
    }
}

.card {
    width: 50px;
    height: 75px;
    position: relative;
    cursor: pointer;
    transition: border 0.3s ease-in-out;
}

.card img {
    width: 100%;
    height: 100%;
}

.card.selected {
    border: 3px solid #9400D3;
    box-shadow: 0 0 10px 2px #9400D3;
}

.buttons {
    margin-top: 20px;
}

button {
    padding: 5px 10px;
    font-size: 16px;
    margin: 0 10px;
    cursor: pointer;
}