Basically it is a slide out menu that is fixed to the right side of the page as a column. The slide out will contain the main menu items and the column contains the sub menu items in an abbreviated form. The XF search is contained in the slide out. On mobile, the slide out comes down from the top from a sticky row that also contains a shrinked version of the site logo.
I need to get this done ASAP and there are many different off canvas slide out menu templates available on the net from which to start from. Please PM me if you are interested...thanks