Why optimize? Your CSS code will be faster loading pages and lower traffic costs. So both you and your visitors benefit from an optimization.
How to Optimize and format your CSS? Please get a CSSTidy. You need to download and running it on your web server. Take time guy, but knowledge is power. Try it.
I need in live version! Where? Go to CSStidy.
How To Use? Copy and paste your CSS code into the CSS Input or point your CSS url and click on Process CSS button and see the output. 🙂