One of my favorite features of LESS is the ability to simplify my CSS rules that are deeply nested by using LESS to compose them more simply. I like this feature because it gives me the ability to clean up messy CSS files and make them more maintainable. Take a look to see what I am talking about.

[LESS](http://lesscss.org) is an open-source dynamic stylesheet language for adding features to the CSS language that help you build better CSS. [LESS](http://lesscss.org) parsing is supported in the [free Web Essentials extension](http://visualstudiogallery.msdn.microsoft.com/6ed4c78f-a23e-49ad-b5fd-369af0c2107f) for Visual Studio 2012 and 2013 (though not supported for the Express editions) as well as in the free [WebMatrix](http://www.microsoft.com/web/webmatrix/) tool from Microsoft. It is also supported in most IDEs, as a [JavaScript library](http://lesscss.org) and [even a command-line LESS builder](http://lesscss.org/#usage).

You can view this excerpt from my Pluralsight course covering Web Debugging with Firebug, Fiddler and more.  If you want to view the entire course, you can find it here:

http://pluralsight.com/courses/web-debug