It is not perfect bur far better thank you ! I will keep it that way
https://youtu.be/QzQzlrQ6ePA
By the way I can’t modify the background color of the fixed header without the .site-header.fixed-header commands
Without any CSS declarations, the issue is not totally solved : https://youtu.be/mHZwcDs62U0
After multiple tests with overflow I think that the problem comes from the hidden header that stays at the top of the page when we scroll.
Sure, here is a video showing the problem : https://youtu.be/OZ5P-okOWoI
