ter-3"><span class="number">3.</span>Chapter 3</a></li>
            </ul>
          </div>
          <div class="main-content">
            <h1 id="chapter-3"><span class="number">3.</span>Chapter 3</h1>
            <p>This is the chapter 3</p>
          </div>
          <div class="content-nav content-nav-bottom">
            <a class="prev-page" href="../chapter2/section1.html">
            <i class="fa fa-angle-left"></i>
            <span class="number">2.1.</span>
            custom title
            <