Cascading Style Sheets (CSS) first dropped in 1996, and it remains an essential, evolving part of the web development stack. Like other living languages, CSS is constantly introducing new features ...

Tony Patton focuses on CSS fundamentals and explains how multiple rules for the same element are handled. Multiple rules ensure that there will be no surprises for either you or the user community.

Cascading Style Sheets (CSS) level 3, also known as CSS3, introduces multiple background images support. ... W3C: CSS3 Backgrounds and Borders Module Level 3; Warnings.