I’m new to webdev. I tried the things you suggest and the page background doesn’t change at all. It has nothing to do with asking for a customization service. And asking for help with a single line code is not the same as asking the internet to build my blog for me. I thought the point of coming here was for support, especially for a piece of software that is supposed to make life easier.
ajeet’s post did help. Thank you. What I was missing was `.post`
I have coded my own website from scratch before, but injecting bits of code is something new entirely for me. I defaulted to Publii for the blog portion of it, as I don’t want to have to write down entire pages in HTML/CSS/JS for my non case-studies.