@BKeyport I was able to solve some of the width wonkiness I was having. Figuring out the CSS is definitely a project, as you say, it costs nothing to backup my custom.css, try something new, the restore the old one if I borked it somehow.
New to MagicMirror but loving it so far. My Raspian desktop fits normally on my screen, but when I run MM, the modules on the right side overshoot the display and get clipped. Thoughts on why or how I can diagnose this? Thanks!