YUI offers four CSS files at present:
|reset.css||Removes all the existing browser styles so that differences in how Internet Explorer styles a <li> or <b> from how Firefox does it are gone.|
|base.css||Provides default styles for all the elements so they will look the same across browsers.|
|fonts.css||Provides consistent font sizing across browsers.|
|grids.css||Provides a great way to layout complex pages with multiple parts within parts, centering, sizes, etc. without having to resort to tables.|
I used them on LOL.com and was very happy with how uniform they made my pages look across different browsers. It’s usually hard work to do a layout with many parts to it and lots of formatting and test it various places. With YUI CSS I was able to do it once and do some fairly light testing and still get a very consistent look.