@media screen and (min-width: 768px)
{
    .shop-page-wp-grid
    {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }
}
@media(min-width: 768px)
{
    .shop-page-wp-grid .shop-page-wp-item.spwp-full-width
    {
        width: 100%;
    }
    .shop-page-wp-grid .shop-page-wp-item.spwp-one-half
    {
        width: 50%;
    }
    .shop-page-wp-grid .shop-page-wp-item.spwp-one-third
    {
        width: 33.3%;
    }
    .shop-page-wp-grid .shop-page-wp-item.spwp-one-fourth
    {
        width: 25%;
    }
}