CSS Intermediate Tutorial
Like the HTML Intermediate Tutorial, this CSS Intermediate Guide should not be that difficult, but rather build on the basics of the CSS Beginner Tutorial.
HTML Dog, The Book 
HTML Dog is hosted by Titan Internet
Contents
- Class and ID Selectors - Make your own selectors without the need for sticky-backed plastic!
- Grouping and Nesting - Properties assigned to multiple selectors or selectors within selectors.
- Pseudo Classes - Defining various states of a link selector.
- Shorthand Properties - Various properties, such as borders and margins that amalgamate other properties into one.
- Background-images - Guess.