title: My DIVs are not responsive
body: <p>I am trying to make responsive my content DIVs, but they are not responsive.</p>
  
  <p>DIV structure is like this - </p>
  
  <p><img src="https://i.stack.imgur.com/hh68H.png" alt="enter image description here"></p>
  
  <p><strong>Update :</strong> This is my HTML and CSS </p>
  
  <pre><code>&lt;div class="container"&gt;
      &lt;div class="row"&gt;
          &lt;section class="content-tertiary col-sm-4"&gt;
              my content
          &lt;/section&gt;
  
          &lt;section class="content-primary col-sm-8"&gt;
              &lt;div id="main" class=""&gt;
                  &lt;h1&gt;&lt;i class="icon fa fa-user fa-lg"&gt;&lt;/i&gt;&lt;img src="img/misc/title.png" /&gt;&lt;/h1&gt;
  
                  &lt;div class="sidebar"&gt;&lt;/div&gt;
                  &lt;div class="content-box"&gt;&lt;/div&gt;
              &lt;/div&gt;&lt;!-- End main div --&gt;
          &lt;/section&gt;
      &lt;/div&gt;&lt;!-- /.row --&gt;
  &lt;/div&gt;&lt;!-- /.container --&gt;
  </code></pre>
  
  <p>CSS </p>
  
  <pre><code>#main {
      background: #53001E;
      border-radius: 10px;
      height: 700px;
  
      &gt; .sidebar {
              background: #FFFFFF;
              float: left;
              height: 300px;
              margin: 0 10px;
              min-width: 100px;
      }
  
      &gt; .content-box {
          background: yellow;
          float: left;
          height: 100px;
      }
  }
  </code></pre>
  
  <p><strong>NOTE:</strong> I am using <code>bootstrap</code> and dont need to display on mobile view. </p>
  
  <p>Can anybody tell me what is the wrong with this code? </p>
  
  <p>Thank you. </p>