side menu question

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.6/semantic.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.6/semantic.min.css">
<div class="ui inverted top fixed menu">
  <div class="header item">
    Top Menu Header
  </div>
</div>
<div class="ui grid">
  <div class="four wide column">
    <div class="ui inverted left vertical fluid menu" id="side-menu">
      <div class="item">
        Item #1
      </div>
      <div class="item">
        Item #2
      </div>
    </div>
  </div>
  <div class="twelve wide column">
  <!-- Main content here -->
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div><div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
    <div class="row">
      Text here
    </div>
  </div>
</div>

CSS

#side-menu {
  height: 100vh;
}