Compass improves the SASS experience by providing useful mixins, functions, and more. You will also learn how to make CSS sprites with it in this episode.

If you’re tired of typing vendor-specific prefixes for CSS properties you should take a look at the Bourbon library which includes several SASS mixins and functions to make working with CSS more convenient. In this episode Ryan Bates shows you how to use it in a Rails application.

Sass extends CSS with variables, nesting, mixins and more. Watch as Ryan Bates shows how to convert plain CSS to SCSS in a Rails application.

IE Mobile 7 does not support CSS3 Media Queries, but it supports IE Conditional Comments, which can be combined with the former to enable targeting Webkit based smartphone browsers, Windows Phone 7, and a large range of desktop browsers.

Internet Explorer Mobile is based on Internet Explorer® 7 for the desktop; however, there are differences that web developers should consider. IE Mobile implements some JavaScript querying functions that help jQuery and similar frameworks execute much faster, has a minimum viewport dimensions of 320x480, and does not support *-scale properties. Adjusting text size should be done by setting the -ms-text-size-adjust CSS property. Additionally, fixed positioning is relative to the document, not the window (as in IE 7).