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CSS Visual Rules
CSS Structure

To style an HTML element using CSS, you need to write a CSS declaration inside the body of a CSS selector.

h1 { color: blue; }

The example above selects the <h1> element. Inside of the selector’s body, we typed color: blue. This line is referred to as a CSS declaration. CSS declarations consist of a property and a value.

Property — the property you’d like to style of that element (i.e., size, color, etc.).

Value — the value of the property (i.e., 18px for size, blue for color, etc.).

In the example above, the property is color and the value is blue. The property and value are separated by a colon (:). A semicolon (;) should always be used at the end of a declaration.

Finally, the entire snippet of code in the example above is known as a CSS rule or rule set. A CSS rule consists of the selector (here, h1) and all declarations inside of the selector.


Look at style.css and explore the different CSS rule sets.

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