This is a really great visual way to learn CSS vocabulary. Love the simple and clear UX/UI. Have you thought about adding pop ups when you click on each term th

This is a really great visual way to learn CSS vocabulary. Love the simple and clear UX/UI. Have you thought about adding pop ups when you click on each term that explains the exact purpose of each? It could be an interesting way to expand this into a 5 minute self-taught tutorial.