CSS Reference at SitePoint

SitePoint has a new CSS Reference site that you may find useful. It includes the following topics:

• What Is CSS?
• General Syntax and Nomenclature
• At-rules Reference
• Selector Reference
• The Cascade, Specificity, and Inheritance
• CSS Layout and Formatting
• Box Properties
• Layout Properties
• List Properties
• Table Properties
• Color and Backgrounds
• Typographical Properties
• Generated Content
• User Interface Properties
• Paged Media Properties
• Vendor-specific Properties
• Workarounds, Filters, and Hacks
• Differences Between HTML and XHTML
• Alphabetic Property Index

If you haven’t checked out the rest of SitePoint’s site, do it! They have tons of wonderful tutorials and resources!