Move title with navigation

Hey Ghost community,

I have uploaded and customized the Okiro theme (preview here Okiro - Multipurpose Ghost Blog Theme Preview - ThemeForest)) and I would like to overwidth the navigation upper left with 5 items.
I have changed the “navigation.hbs” to start the “…” at the 6th and 7th element but the navigation is floating through the title, at the center.

Do you know how to slide (to the right) automatically the title depending on the number of the navigation’s items ?

Many thanks.