How to make a horizontal menu the full width of the page?

Question

css

There is such a thing: jsfiddle.net/rtomj3hr .
It is necessary that, when retracting the mouse, the menu remains in place and that instead of a list, Div would fall out, also for the entire width of the screen

Answer 1

what do you need, you wrote,
but what is the question?
or is it a job?

Answer 2

I figured out the Menu, so it's in Dive, how to fix it?