[OJFord]

I think it's a mistake, it's due to:

    .skinny {
        width: 30em;
    }

on `body`. To me at least `.skinny` suggests there's a non-skinny style it should be picking up on non-mobile/small screens, but isn't.

edit: Ah, yes, there is also a `.wider` (not being used) at `45em`.