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Re:Fancy Buttons - Customize Buttons Effortlessly with CSS3 ... by pohl on Friday November 20, 2009 @04:13PM (#953426)
The variables appear to be a SASS construct, not CSS.

http://en.wikipedia.org/wiki/Sass_(stylesheet_language)

Re:Fancy Buttons - Customize Buttons Effortlessly with CSS3 ... by imathis on Friday November 20, 2009 @04:28PM (#953460)
SASS compiles to CSS.
Re:Fancy Buttons - Customize Buttons Effortlessly with CSS3 ... by smanek on Friday November 20, 2009 @05:57PM (#953663)
And it inlines the variables as constants at 'compile time'.