optional_reading_module
The "extra credit" slot at the bottom of a workshop or section. Curated bonus material for students who finish early or want to dig further — not required, not assessed. Teaser + collapsed-content shape signals "this is a treat, not a task."
If you're curious
A short tour of the boring corners of CSS that turn out to be interesting once you look.
Read more
Three short reads if today’s session left you wanting more: