Demo

<!DOCTYPE html>
<html>
	<head>
		<title>Block elements</title>
	</head>
	<body>
		<h1>Blocks are full-width</h1>
		<p>Longer text will wrap internally within each block element.</p>
		<p>Other blocks will then stack underneath.</p>
		<aside>
			<p>They can still be nested.</p>
			<p>And will push down the page.</p>
		</aside>
	</body>
</html>