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Adjusting Open Menu design for mobile in-scroll effect

So basically for our website I created an in-scroll effect for the nav bar. That works fine, but how can I adjust the OPEN MENU layout/design for the in-scroll nav bar on mobile? This is something I havent been able to figure out. Perhaps one of you will have an answer!

Here is my public share link: [LINK]1
(how to access public share link)