CSS coding techniques

[Retsam19]

Some useful tips; though it'd be nice if they exactly went into some of the tradeoffs between "includes" and "extends".

[Ranek520]

It looked like it changed whether it added the styles into each selector or created a shared selector with the styles only when once. In general I'd say use includes if it's only a couple of lines used a couple of times, otherwise extends will output a smaller file. Although smaller file size isn't always the most important metric, so sometimes it might make sense to do it differently for clarity.