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<html><title>W3.CSS</title><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="https://www.w3schools.com/w3css/5/w3.css"><body><div 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></div></body></html>