Large Main Menu resize Logo

Hi,
we happily use enfold, but have some small problems, here’s what we want to achieve:
We need a quite large main-menu inkluding 2 Links displayed as buttons. That’s why i deactivated the “shrink-effect” on scrolling.
Now, if the screen-width is between ~800px and 990px the main menu overlaps our logo
Which options do we have?

• activate “mobile menu” already on width < 990 (that would be not preferable)
• resize the logo and move it to the upper left corner, it would be no problem if we would have to move the main menu down
• am i overseeing something? or do we have another option?

Here’s the url of our site, it is currently under construction: http://new.dev.net-files.de/
Best regards!