Space in Header

Hello.

I am unsure what I did and tried resetting everything but there is a very large space in the header below the logo and above the bar when it is at full screen, but not when I minimize or on mobile. Can you see what is not right? The site is italygeek.com. Thank you!

Hi there

Sorry but i can’t see your website, i see only this:

This site can’t be reached
italygeek.com’s server IP address could not be found.