Board Thread:Support Requests - Getting Technical/@comment-24761405-20160524171845/@comment-24473195-20160525140854

The trick is to use something that displays properly on the desktop and falls back to one column on mobile. So as long as you put those in divs you can have as many columns as you like on the desktop because the mobile skin will strip all of them and display them in as a single column. You can see an example here.