It’s not a huge break, it’s just that someone was silly with the CSS and how they defined the width of the page. Basically, if you magnify the page in Firefox or Chrome (hold Ctrl, press +), the white doesn’t continue past the initial size of the window. Meaning one is reading black text on a dark grey background.
The reason I bring this up is because I have sight issues and I do have to magnify a page in order to be able to read it. And reading black text on a dark grey background isn’t easy. It should be an easy enough fix, though. I think. And I would very, very much appreciate it! Though I can understand if you don’t prioritise this, since… it’s probably kind of rare, and not a lot of people will see it.