Can I include a stylesheet inside my blogpost? (yes)
Let's try this:
<link rel="stylesheet" href="https://reedybear.com/styles.css">
and idk what'll happen, but the tag is pasted above
(edit) It worked!
I used my stylesheet from reedybear.com so that kinda messed up all my bearblog styles. Visit any of my other pages & you'll see that the styling is VERY different.
I guess you'd need to upload your stylesheets somewhere to include them from external sources. I think github has such a feature for cdn style file delivery. maybe there's a workaround for blog posts on bearblog ...