Breakdance popup covers header

Hey guys i’m building in breakdance and need a little help.
The idea is that when one of the pictures is clicked, it triggers a popup. The popup is essentilly a menu.
I would like the popup to be full height. But, i don’t want it to cover the header.

I tried working with the Z-index in both the header and the popup but it had no effect.

[When the button is clicked the menu slides in from the left. ](https://preview.redd.it/5i8levoahvad1.png?width=3800&format=png&auto=webp&s=765db297c74c61bbe9261c149df9916f81d60afb)

[ But it covers the header.](https://preview.redd.it/usi027jzgvad1.png?width=3838&format=png&auto=webp&s=cb470f134db0c4d8f54d2138c9443a402c08d4e0)

Any thoughts about how to fix this?

 

This site will teach you how to build a WordPress website for beginners. We will cover everything from installing WordPress to adding pages, posts, and images to your site. You will learn how to customize your site with themes and plugins, as well as how to market your site online.

Buy WordPress Transfer