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                <div class="off-canvas-wrap" data-offcanvas>
  <div class="inner-wrap">

    <a class="left-off-canvas-toggle" href="#" >Menu</a>

    <!-- Off Canvas Menu -->
    <aside class="left-off-canvas-menu">
        <!-- whatever you want goes here -->
          <li><a href="#">Item 1</a></li>

    <!-- main content goes here -->
    <p>Set in the year 0 F.E. ("Foundation Era"), The Psychohistorians opens on Trantor, the capital of the 12,000-year-old Galactic Empire. Though the empire appears stable and powerful, it is slowly decaying in ways that parallel the decline of the Western Roman Empire. Hari Seldon, a mathematician and psychologist, has developed psychohistory, a new field of science and psychology that equates all possibilities in large societies to mathematics, allowing for the prediction of future events.</p>

  <!-- close the off-canvas menu -->
  <a class="exit-off-canvas"></a>



                .left-off-canvas-menu {
  opacity: 0;
  transition: 1s ease-in-out;

.move-right .left-off-canvas-menu {
  opacity: 1;