using stylesheets are a great way to style your css on your website, and like php inlcudes it can make for quick updating when it comes to your site. when using stylesheets you just take all the codes you would insert between style tags and insert them in a .css page without any style tags. then you link the stylesheet at the top of every page you want the stylesheet to be on. use the following code.
<link rel="stylesheet" href="http://yoursite.com/yourstylesheet.css" type="text/css">
make sure your stylesheet is in .css for the desired result! [:
that's all you need! now you just link it at the top of all the pages your want the stylesheet to be on and there you go!
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