If you want to work along with the video, start from this pen. Open that and click the “Fork” button in the bottom-right so you can get your own copy to work with.
The CSS framework I used is Milligram. I like to use it because it takes just basic HTML and makes it look nice. I don’t have to sprinkle a bunch of wacky classes around to get something that looks decent.
I talk about the “+” selector and refer to it in the video as the “sibling selector.” More accurately, it’s the adjacent sibling selector. It only selects the UL if it is a sibling of the checked checkbox and also if the two are adjacent (meaning no elements between).
Hope you enjoy this tutorial! Comment here or tweet at me if you have questions.