... 344 CSS (Cascading Style Sheets) history of, 6 versions of, 17–18 CSS 3 columns, 236, 238 CSS extensions, 86 CSS frameworks, versus CSS systems, 238, 243 CSS image maps, 150, 156 CSS ... maps, 150, 156 CSS opacity, 95 CSS sprites, 123, 125 CSS validator, 246 CSS2 , advanced features, 284, 292 CSS3 , advanced features, 284, 292 CSS- Discuss, 256 CSSDoc, 44 Cufón, 298, 299, 300, ... Climb the Mountains concept together for this second edition of CSS Mastery, especially with the freedom to cut loose with some fresh CSS 3 ideas. Naturally, there are oodles more bits and pieces...