[Theme: Hueman] How can I change max-width of home page only?

Found a solution myself. Thanks! 🙂

The solution for this specific theme, in the case of three colums:

.col-3cm.main {
  width:1380px;
}

It was really that simple. Now all you have to do is use this guide to position your container: http://designshack.net/articles/css/how-to-center-anything-with-css/