Looks good! One thing -- is it possible to remove the shadow or make it a little bit less on the top?

We can do whatever we want with the style but I don't quite understand what you want it to look like, can you give me a mockup of what you want?

I put a screenshot of a mockup I made in the comment I left earlier.
Just for the top of the expanded menu to not have a shadow so it's not as harsh of a jump from the regular nav to the expanded nav. Your example here for reference:

Got it, wasn't clear what the screenshot was since there wasn't much context in the comment