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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="https://www.w3schools.com/w3css/4/w3.css">
<body>
<div class="w3-container">
  <h2>w3-section</h2>
  <p>The w3-section adds a 16px top and bottom margin to an element.</p>
  <p>This makes an element behave like a paragraph:</p>
  
  <div class="w3-container w3-green">
    <p>Tokyo is the center of the Greater Tokyo Area,
    and the most populous metropolitan area in the world.</p>
  </div>
  <div class="w3-container w3-red">
    <p>Tokyo is the center of the Greater Tokyo Area,
    and the most populous metropolitan area in the world.</p>
  </div>
  <div class="w3-container w3-section w3-green">
    <p>Tokyo is the center of the Greater Tokyo Area,
    and the most populous metropolitan area in the world.</p>
  </div>
  <div class="w3-container w3-section w3-red">
    <p>Tokyo is the center of the Greater Tokyo Area,
    and the most populous metropolitan area in the world.</p>
  </div>
</div>
</body>
</html>