Multipage app : have header above navigation


I’d like to have some specific content for each page on my app, at the top of the header, where links to pages automatically appear.
So that I can have a specific lottie anim per page.

I presume this can be done with css, which I am lame at.
Extra wish for navigation to be 50% of height

If you reached this page for the same wish, look at

to have a logo on top of nav