Hi Robert,
I have checked your website and recognize the problem you are having. It is due to the custom style you implemented with your logo and the background color of it. It is required a few more customization to adjust while the Navbar is sticky, I would suggest you hire a developer who can assist you to do the customization or you can avail of our newly launched service called One, where we answer the questions beyond normal theme support.
Also, you can try customizing the Header using the Header Builder which is exclusively available with Pro not with the X you are using.
I would suggest you upgrade to the Pro theme, please go through the process here: https://theme.co/docs/converting-from-x-to-pro
And also go through the following article on Header Builder.
And then you can add the following Navigation element for the desktop:
- Navigation Inline
And then you can add the following Navigation elements for smaller screen:
- Navigation Dropdown
- Navigation Modal
- Navigation Off Canvas
And adjust the Navigation by using the Customize > Hide During Breakpoint option to show/hide in the specific screen size.
Hope it helps.
Thanks