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<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>CSS Nesting</title>
  <link rel="stylesheet" href="style.css" />
</head>
<body>
  <header class="page-header">
    <h1>CSS Nesting</h1>
    <p class="lead">Native nesting (like Sass) — no preprocessor required.</p>
  </header>
  <main class="demo">
    <div class="card-n">
      <h3>Nested Card</h3>
      <p>Body text.</p>
      <a href="#">Read more</a>
    </div>
  </main>
</body>
</html>