.card-collection {
    padding-top: 113.45%;
}
.card-collection-row
{
    margin: -16px;
}
.card-collection-col
{
    padding: 16px;
}

@media (min-width:768px)
{
    .card-collection-row
    {
        margin: -5px;
    }
    .card-collection-col
    {
        padding: 5px;
    }
}