Change Product Section width to fit across full page

Site URL: https://trumpet-cinnamon-netz.squarespace.com/

Hi, is it possible to widen a product list section to a custom width, perhaps using CSS? There's a bit too much margin space at the moment. I can send thru the password to the website on request 🙂 Any help is much appreciated. 

Hi. WHat is password?

Hi, I sent you a message with the password - any luck getting into the website?

 Add to Design > Custom CSS

.tweak-products-width-inset .products.collection-content-wrapper {
    max-width: 100% !important;
}