Menu sitting below the fold on standard resolutions

The site in question is http://david.wilks.online.

On a 1920x1080 monitor every thing is good. But on a standard 1366x768 monitor the menu is waaaayyy below the fold.

We have tried to find a solution short of making a global change (undesirable) but haven't been able to :slight_frown:

What is the secret?

I've attached a screenshot showing both resolutions.

Thanks,

David Wilks