Titlebook: CSS Quick Syntax Reference; Mikael Olsson Book 20141st edition Mikael Olsson 2014

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Using CSS,There are three ways to insert CSS into an HTML document: by using an internal style sheet, inline styles, or an external style sheet. An internal style sheet applies to a single page, an inline style to a single element, and an external style sheet to potentially an entire web site.

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Grouping,To keep style sheets short and easy to edit, similar rules can be grouped together. This grouping offers several ways to specify a set of related rules. For example, you can color the text red and the background black for two header elements in four different ways, as described in the following sections.

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Attribute selectors,Attribute selectors allow style to be added to elements based on their attributes and attribute values.

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