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.

Load the style sheet containing your CSS code. If you do not use separate style sheets, the CSS will be located between the tags at the top of your HTML file. Scan through the CSS code and and ...

CSS Specificity: The site provides a unique infographic with icons representing various combinations of selectors along with a legend, an About section, and links to the CSS Dev Conference.

Yes, we'll still be supporting IE 7 and IE 8 for some time, and yes, IE9 still lacks a few things, like support for CSS 3 text-shadows or HTML5's form elements, but it's a step in the right direction.