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<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="../lib/w3.css">
<body class="w3-container">

<h1>Heading 1 (36px)</h1>
<h2>Heading 2 (30px)</h2>
<h3>Heading 3 (24px)</h3>
<h4>Heading 4 (20px)</h4>
<h5>Heading 5 (18px)</h5>
<h6>Heading 6 (16px)</h6>

</body>
</html>