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<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<link type="text/css" rel="stylesheet" href="../lib/w3.css">
<body>

<div class="w3-container">
  <h1>This is Heading 1</h1>
  <h2>This is Heading 2</h2>
  <h3>This is Heading 3</h3>
  <h4>This is Heading 4</h4>
  <h5>This is Heading 5</h5>
  <h6>This is Heading 6</h6>
<p>This is a paragraph.</p>
</div>

</body>
</html>