I have a little tip to help identify which parts of the CSS are assigned to which item on the page, if you use FireFox as your browser, you can install the addon "Web Developer" it has a CSS menu, select "view style information" it will allow you to drag a box over the area of the page you are interested in, it will then show you all CSS attributed relevant to that area of the page, a real time saver!
Enjoy
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