I'm trying to use the newish grid display property in CSS with a form but I'm having a bit of trouble making a container for it.  My idea was to use custom html items to create a div container for the grid items.  I've tried creating a blank custom html item with only an opening div tag in it but it automatically adds the end tag when I save it.    I need the div end tag after all of the grid items.

Has anyone tried successfully to use grid on a form?