Change Site style on one page

Site URL: https://www.jsdidoi.com/animation

Hi

I have a multiple Index pages which currently is set out to have 2 columbs on desktop and tablet view and 1 column on mobile. I want to change the site style for one index to have 3 columbs in desktop view without effecting the other index's I have set up. I assume i would need some custom css to do this but im not sure how.

Is there a  simple way to do this?

Thanks in advnace 

Johnny

Try adding this to Design > Custom CSS

/* Animation page 3 columns desktop */
@media screen and (min-width:901px) {
body#collection-5dd78fb9f0547d640c85e934 div.index-section {
    width: calc(~"33.33% - 1px") !important;
}
}

Thanks so much!!! thats done it 😀