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Currently the only browser-specific CSS you can add is for Internet Explorer 5.5 and above using the USERGUIDE: IE CSS resource.

In cases where you absolutely must apply a style to a specific version of a specific browser, there's a useful list of known CSS hacks that you can refer to. It should be noted that we don't recommend using CSS hacks - it's best to find an alternate way of applying your styles wherever possible.

Define your main CSS in a parent layout and then create child layouts based on that parent layout - by default the CSS defined in the parent layout will be included in all the child layouts. Changing the CSS in the parent layout will instantly update all the child layouts.

You can add additional CSS in the child layouts using the USERGUIDE: Custom CSS and USERGUIDE: IE CSS resources. If you add styles to the child layout that are already defined in the parent layout, they will override the styles defined in the parent layout because they are output after the parent layout styles. (hope that makes sense!)

The USERGUIDE:"Merge this layout's CSS with it's parent's" setting allows you to define whether a child layout also includes the CSS from the parent layout.

You can find more information on our Style Sheet Inheritance page.