title: How to set a margin between rows
body: <p>I've this code structure</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.col_1_6 {
      width: 70%;
      float: left;
  }
  
  .col_1_4 {
      width: 30%;
      float: left;
  }
  
  .row-content {
      clear:both;
      padding-bottom: 105px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="row-content"&gt;
      &lt;div class="col_1_4"&gt;
          &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipisicing elit. Voluptates aperiam sint nam ea rerum. Ullam dolor ratione repellat assumenda laboriosam rerum omnis expedita esse dolores totam reiciendis nihil voluptatem eos.&lt;/p&gt;
      &lt;/div&gt;
      &lt;div class="col_1_6"&gt;
          &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipisicing elit. Voluptates aperiam sint nam ea rerum. Ullam dolor ratione repellat assumenda laboriosam rerum omnis expedita esse dolores totam reiciendis nihil voluptatem eos.&lt;/p&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  
  &lt;div class="row-content"&gt;
      &lt;div class="col_1_4"&gt;
          &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipisicing elit. Voluptates aperiam sint nam ea rerum. Ullam dolor ratione repellat assumenda laboriosam rerum omnis expedita esse dolores totam reiciendis nihil voluptatem eos.&lt;/p&gt;
      &lt;/div&gt;
      &lt;div class="col_1_6"&gt;
          &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipisicing elit. Voluptates aperiam sint nam ea rerum. Ullam dolor ratione repellat assumenda laboriosam rerum omnis expedita esse dolores totam reiciendis nihil voluptatem eos.&lt;/p&gt;
      &lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>I want to set a margin between <code>row-content</code> but I try to set a <code>padding-bottom: 105px</code>, it still does not work.</p>
  
  <p>How can I set a clean margin between these rows ?</p>