Lesson 23 - suddenly my styles disappear [Solved]

This is expected in lesson 23

But I got

Which is weird because lesson 22, I got it to work ccorrectly.

Not sure why.

How do I troubleshoot?

Here are my lesson 23 steps:

image

Oh never mind, ignore me. I realized why. I replaced the entire html code inside base.html. Instead of just the body tag