CHAPTER NINEWorking with External Style Sheets
External style sheets are separate files with .css filename extensions that are linked to HTML Web pages. Those CSS files define page attributes for every page to which they are linked.
External style sheets have many powerful advantages that make them ubiquitous in professional Web sites:
• They can be applied to any number of pages.
• They can be used to instantly update the look and format of every page to which they are attached.
• They ensure a uniform, global look and feel to a Web site by applying uniform formatting to every page in the site.
A single style sheet file (or sometimes a few files) stores all the information needed to format every Web page to which that style sheet is attached. ...
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