 class="top-bar">
        Step 3
      </div>
      <div class="content">Done!</div>
      <div class="bottom-bar">
        <button class="button-prev" on="tap:AMP.pushState({ currentPage: currentPage - 1 })">back</button>
        <div class="step-dots">
          <i class="step-dot active"></i>
          <i class="step-dot active"></i>
          <i class="step-dot active"></i>
        </div>
      </div>
    </section>
  </div>
  <h2 class="preview-only">A vertical Stepper</h2>
  <p>Use the browser back bu