Is it possible a diferent background for sticky menu?

Glad I could help! :)

Hi, I'm having problems trying to replicate the effect where you have the main navigatio with one color for the text and no background and then as soon as you start scrolling, the logo, the text and the background change the style, the background is set to white, the text to black and the logo to a different design. Perhaps can you help me achieve something similar?

Hi there,

You would need to merge the page header with navigation first:
https://docs.generatepress.com/article/merging-the-page-header-site-header/
https://docs.generatepress.com/article/merging-header-navigation-content/

Then you can use custom navigation color: https://docs.generatepress.com/article/merging-the-page-header-site-header/#custom-navigation-colors

But that won't allow me to use some elementor features that I'm using in my custom header like the animated headline

Not sure what you mean? Are you using Elementor for the header?

Can you link me to the current site?

Now I have this problem where there is a space between the main nav and the first elementor section. That only happens in the home page and in two more pages (not all pages have this issue) please, how can I fix it without damaging the other pages?

Try this: https://docs.generatepress.com/article/page-builder-container/#full-width

Thank you, that solved the problem with the navigation.

No problem!