Fix postcss nitpicks (#3077)
Re: #3065
It also fixes the gnarly stack trace error whenever the node code throws, but it doesn't look very pretty. Not sure how to handle it:
<img width="1280" alt="Screen Shot 2022-12-19 at 3 46 56 PM" src="https://user-images.githubusercontent.com/112982/208519095-ec7ad539-5c23-4b95-bcc1-71ba30381e60.png">
