Dasmoto project header too large

Hi! This is my first time posting. I’m working through the Front-End Engineer path, at 9% completion. I’m stuck on the Dasmoto’s Arts and Crafts project. I have it nearly finished, but my header is coming out far too large and I’m not sure how to fix it. Below is the CSS I used.

And this is the way it’s looking. The header takes up the entire screen.