Technical documnation page

hey everyone, and thanks for the help here.
im working on the doc page and im having a problem with css…

A Pen by Niv Barsheshet (codepen.io)

thats my code pen , i used an highet of 320px to the nav under 800px screen , because when you change the size to under 400px its the only way it fit , i tried to control the diffrent media trgho the - zed-index but with no success , any help ?

@nivbarsh but i see that your code pass the tests…

its not about the test… its about prefection. any help ?