CSS, short for Cascading Style Sheets, is a language used to control the presentation of HTML and XHTML documents. Each CSS document is made out of rulesets preceded by a selector - a set of rules for matching HTML and XHTML elements, containing property-value pairs that defines the presentation of the elements matching the selector. CSS is presented as a collection of features (CSS1, CSS2, CSS3).
- W3C Cascading Style Sheets home page
- SitePoint CSS Reference
- W3C CSS Validation Service
- Cascading Style Sheets on the Web Standards Curriculum
- Eric Meyer's reset.css