c3css.com
C3 CSS
A methodology to help you write human-friendly CSS. C3 (Component, Child, Context) is a methodology for writing CSS, centred around a selector naming convention. This approach is intended for anyone who wants to write code which is semantic, easy to maintain, and scalable. If you are familiar with BEM, you will be familiar with two thirds of C3. Either way, you should find all the information you need in this guide.