How to make 4 product categories in a row

On the homepage of Justshop theme, by default there are 3 categories. You choose to have 4 products categories ( by going to themeoptions/woocommerce ) when you do so, the fourth category comes in the second row. 

To make all 4 products stay in one line, Put below styles in Themeoptions/customcss box.

@media only screen and (min-width: 981px) {
.home ul.products li.product.product-category {
    width: 20%;
}
}
@media only screen and (min-width: 767px) {
.home ul.products li.product.product-category.last {
    margin-right: 25px !important;
}    
.home ul.products li.product.first {
    clear: none;
}
}