CSS works by associating rules with HTML elements. These rules govern how the content of specified elements should be displayed. A CSS rule contains two parts: a selector and a declaration.
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what is selector ? indicate which element the rule applies to. The same rule can apply to more than one element if you separate the element names with commas.
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what is declaration ? indicate how the elements referred to in the selector should be styled. Declarations are split into two parts (a property and a value), and are separated by a colon.
The elements displayed in css : you can declarations sit inside curly brackets and each is made up of two parts: a property and a value
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what is properties ? indicate the aspects of the element you want to change. For example, color, font, width, height and border.
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what is values ? specify the settings you want to use for the chosen properties. For example, if you want to specify a color property then the value is the color you want the text in these elements to be.
