Demo

style.css
index.html

body {
	color: gray;
	font-family: sans-serif;
}

span {
	color: blue;
	font-style: italic;
	font-weight: bold;
}

<!DOCTYPE html>
<html>
	<head>
		<title>Inheritance</title>
		<link href="style.css" rel="stylesheet">
	</head>
	<body>
		<h1>This is a heading</h1>
		<p>This is a paragraph.</p>
		<p>This is another paragraph.</p>
		<p>This is <span>third</span> paragraph.</p>
	</body>
</html>