Introduction to CSS3
CSS3 is fully backward compatible, so you don't have to change your existing designs.
CSS3 Modules
CSS3 is divided into "modules". The old specifications have been split into smaller pieces, and new ones have been added.
Some of the most important CSS3 modules include:
- Selectors
- Box Model
- Backgrounds and Borders
- Text Effects
- 2D/3D Transforms
- Animations
- Multi-column Layout
- User Interface
CSS3 Recommendations
The W3C's CSS3 specification is still under development.
However, modern browsers already support CSS3 properties.