1) How can I get the white bar that appears on the phones scrolling
to the right? I intuit that it has to do with the sticky bar,
because when I go up on the page, the sticky bar is shown with full width.
I want to keep the bar sticky, but I do not want that bar to appear.
2) Is there any way to hide in the posts corresponding to a category,
hide the category itself?
I mean, I have a news item category “Complement of principal”,
what I want is that when I enter that post, I do not show the category anywhere,
it does not show that it is of the “complement of principal” category.