CSS stands for Cascading Style Sheets · CSS describes how HTML elements are to be displayed on screen, paper, or in other media. CSS can be used to define text styles, table sizes, background-color and other aspects of Web pages that previously could only be defined in a page's HTML.More..
History:
CSS was first proposed by Håkon Wium Lie on October 10, 1994.
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| Håkon Wium Lie |
EXample:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
/* this is css code */
h1{
background: #ff3030;
color: #fff;
padding: 5px;
}
</style>
</head>
<body>
<h1>Hello World</h1>
</body>
</html>