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. ](

[ But it covers the header.](

Any thoughts about how to fix this?


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