HTML Code

<!DOCTYPE html>
<html>
<head>
  <title>CSS :last-child vs :last-of-type</title>
  <style>
    body {
      font-family: system-ui, sans-serif;
      padding: 1.5rem;
      max-width: 28rem;
    }

    .box {
      padding: 1rem;
      border: 1px solid #e2e8f0;
      border-radius: 0.5rem;
      background: #f8fafc;
    }

    p {
      margin: 0 0 0.65rem;
      font-size: 0.9375rem;
      color: #334155;
    }

    .footer {
      padding: 0.4rem 0.65rem;
      background: #f1f5f9;
      border-radius: 0.35rem;
      font-size: 0.8125rem;
      color: #64748b;
    }

    /* Only matches if p is the last child */
    p:last-child {
      border-right: 4px solid #ef4444;
      padding-right: 0.75rem;
    }

    /* Matches the last p among siblings */
    p:last-of-type {
      border-right: 4px solid #2563eb;
      padding-right: 0.75rem;
    }
  </style>
</head>
<body>
  <div class="box">
    <p>First paragraph.</p>
    <p>Last paragraph — blue border from :last-of-type.</p>
    <div class="footer">&lt;div&gt; is the last child — p:last-child does not match</div>
  </div>
</body>
</html>

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