This is mainly just feedback on the following topic: Basic CSS: Use a media query to change a variable
In it, media query is brought up for the first time. I have seen these before, so was not lost, but this module jumps right into using variable with them, before even really defining what a media query is.
Granted, one can go to Google and find that out, but I thought it would be nice to have a couple of sentences introducing media queries, maybe even a brief additional module.
Thanks!