The leaves of style are useful to define visual attributes in documents HTML (language of marks hipertextual). This provides to the author powerful methods to define the visual style of the document while it separates the semantic part (HTML) of the one of presentation (leaves of style).
It allows the personalización of a document in the screen, even of how goes to print, between other functionalities. With the CSS personalizas any appearance of the web. From the tipografía (source and sizes), staff (position and margins), colours...
When a page is call by the browser, first load the texts and the charts, afterwards applies the style that contain the code HTML, and finally, applies the style that indicate the CSS. This order of load does that the instructions of style defined in the CSS are those that finally will prevail, cancelling those that had defined in HTML (no all, only the coincidentes).
Link leaves of style
Computing service XHTML and CSS
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