2015-10-15, 18:17:15
You will have seen that this theme is a free template from http://www.templatemo.com/tm-417-grill adapted in a fairly rough and ready way for GS. I think I added on the css for the 2nd nav level. It won't have been tested on many devices by me. If you want to be sure you have 'robust fall backs' then you would be wise to test and tinker yourself.