Is there a way to adjust the r/wow sidebar margins as an end user?

I often read r/wow while at work and try to be sneaky by using a small chrome window to peruse my related wow news in secret. However, for a little while now, or at least since the switch to the new Legion layout, re-sizing my chrome browser no longer adjusts and eventually hides the sidebar. Instead, the sidebar ends up taking up the entire screen as the margins are not adjusted like they used to.

I tried to use a javascript code I found on a different subreddit that succeeds in hiding the sidebar, but it does not adjust the margins, and therefore when the browser window is decreased in size, the empty space where the sidebar existed remains constant and the posts and text eventually disappears.

Any javascript tips for me? Or is this just the way r/wow is going to stay these days?

Cheers!