/* CSS is how you can add style to your website, such as colors, fonts, and positioning of your
   HTML content. To learn how to do something, just try searching Google for questions like
   "how to change link color." */

body {
  background-color: white;
  color: black;
  font-family: Verdana;
}
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Notebook Template</title>
  <style>
    /* Basic notebook styling */
    body { font-family: sans-serif; padding: 20px; max-width: 600px; margin: auto; background: #f9f9f9; }
    .tabs { display: flex; border-bottom: 2px solid #ccc; }
    .tabs button {
      flex: 1;
      padding: 10px;
      background: #eee;
      border: none;
      cursor: pointer;
      transition: background 0.2s ease;
    }
    .tabs button.active { background: #ddd; font-weight: bold; }
    .tab-content { padding: 15px; border: 1px solid #ccc; border-top: none; }
  </style>
</head>
<body>
  <h1>Notebook Style Page</h1>
  <div class="tabs">
    <button class="active" data-target="tab1">Tab 1</button>
    <button data-target="tab2">Tab 2</button>
    <button data-target="tab3">Tab 3</button>
  </div>
  <div id="tab1" class="tab-content">Content for Tab 1...</div>
  <div id="tab2" class="tab-content" style="display:none;">Content for Tab 2...</div>
  <div id="tab3" class="tab-content" style="display:none;">Content for Tab 3...</div>

  <script>
    document.querySelectorAll('.tabs button').forEach(btn => {
      btn.addEventListener('click', () => {
        document.querySelectorAll('.tabs button').forEach(b => b.classList.remove('active'));
        btn.classList.add('active');
        document.querySelectorAll('.tab-content').forEach(content => content.style.display = 'none');
        document.getElementById(btn.getAttribute('data-target')).style.display = 'block';
      });
    });
  </script>
</body>
</html>
