Z-index issue

in my example here using the roots theme: http://hiltonnashvill.wpengine.com/accommodations/

i’m running an issue of the dropdown nav falling behind the content

Navigation > Dining

You can see its subnav fall behind the content as you make the screen smaller and it responds.

Here’s an example of it working correctly: http://themeritageresort.com/luxury-napa-valley-hotel (hover over Hotel in the navigation and see how its ontop of the content)

Thoughts anyone?

FOR ANYONE WHO IS READING THIS.

I have the found the boostrap css default sets z-index to 1000 when its the default nav. Removing this enabled that overlap correctly.

Hope this helps anyone who may run into the same issue.