Making the Dynamic header dropdown folder background transparent in top section only

I'm using the Dynamic header style, which uses the theme of the first section on each page and makes it transparent in the first section.

Is there a way to also make the header folder dropdown menu background transparent in the top section only? I've seen CSS to make it transparent always, but I have the header set to Scroll Back and this would impact readability of the menu further down the page.

Site: https://www.northdesignbuild.com/

Thank you!

My testing

8 hours ago, Beyondspace said:

You can try adding to Home > Design > Custom Css

#header:not(.shrink) .header-nav-folder-content {
  background: transparent;
}

Let me know how it works on your site

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Worked like a charm, thank you!