Hello! I have been looking through the forums for the right way to do this, but nothing seems to be working.
I have very little experience with CSS, and am only learning now, so I am not sure if maybe what I wan requires more than just simple CSS.
This is the website I am working on - https://stevemcgill.com/
I currently have this 'additional CSS' installed on the above page, but I can not get the header to go full-width.