CSS Terminology

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ancestor

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an element that contains another element

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border

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the outer boundary of the padding in a CSS box

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content area

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the space reserved for the main text and images in a CSS box

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CSS rule

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one or more selectors and their associated declaration blocks

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declaration

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a pair consisting of a property and a value, separated by a colon

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declaration block

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a group of declarations, paired with one or more selectors to form a CSS rule

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descendant

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an element that is contained within, or is wrapped by, another element

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external style sheet

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CSS specifications that are stored in a separate file and then referenced by the HTML document

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imported style sheet

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style sheets that are imported from within other style files or libraries

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Inline styles

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CSS specifications that are added to an individual HTML element with the style attribute