<div>
  <nav class="octotree-sidebar">
    <div class="octotree-toggle">
      <i class="octotree-toggle-icon" role="button"></i> <span>Octotree</span>

      <div class="popup">
        <div class="arrow"></div>
        <div class="content">
          Hi there, this is Octotree. Move mouse over this button to display the code tree. You can also press the
          shortkey <kbd>cmd shift s</kbd> (or <kbd>ctrl shift s</kbd>).
        </div>
      </div>
    </div>

    <div class="octotree-main-icons">
    