Cara membuat DIVI FULL WIDTH PORTFOLIO

What CSS would I need to achieve a 3 column fullwidth portfolio layout? You can find the site I'm working on here: 

@media screen and (min-width: 981px) {

    .et_pb_fullwidth_portfolio .et_pb_portfolio_item {

        width: 33.33%!important;

        max-width: 33.33%!important;

        height: 100%!important;

    }

}