Chapter 13. User Interface Styles
The vast majority of CSS is concerned with styling documents, but it
turns out that CSS offers a passel of useful interface-styling
tools—for more than just documents. For example, Mozilla
developers created its browser's interface (and that
of many Mozilla clones) using a language called XUL. XUL employs CSS
and CSS-like declarations to present the navigation buttons, sidebar
tabs, dialog boxes, status boxes, and other pieces of the chrome
itself.
Similarly, you can reuse aspects of the user's
default environment to style a document's fonts and
colors; it's even possible to exert influence over
focus highlighting and the mouse cursor. CSS2's
interface capabilities can make the user's
experience more enjoyable—or more confusing, if you
aren't careful.
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