Thank you for your answer.
You are right, there is a navigation inline that I was not aware. I am sorry for that.
But, the problem persist. I don't know exactly what you have done but it does not work on my end.
I followed all your steps and even did it again from scratch.
See, the global block with headline and navigation inline:
And what happens when I do what you sugested:
I don't know why, but the text change color, it gets huge, the menu alignment is horizontal now!!!
I have theme-x updated and everything else.
This is getting a bit frustrating to me.
Hope you (or someone else) can help.