Is there a way to have CSS borders outside the box(div)? Or alternative solution

Question

I have this menu here

I want the highlighting(hover) to extend to the edge of the outside box(service menu). Just like how the popout menu is. The menu itself is contained in another div -

I don't think it is possible to have negative borders the same way you can have negative padding.

Anyone have a good idea on how to get the highlight of the menu to extend to the edge of the outside box on hover?

This is Drupal w/ Nice Menu by the way.

Answer 1

Looks like a margin issue, trying changing the margin to padding, should work almost exactly the same and go to the edge.

EDIT Or set the width of the out div to be the same as the inner div.