title: How to correctly apply a CSS style to all the images in a div having a specific class?
body: <p>I have the following HTML:</p>
  
  <pre><code>&lt;div class="group-item"&gt;
      &lt;a href="profile.html"&gt;
          &lt;img src="resources/img/icons/projects/wifi.png"&gt;
      &lt;/a&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>I am trying to set the CSS property of the <code>img</code> tag inside the div having <code>class="group-item"</code> in this way:</p>
  
  <pre><code>.groups-item img {
      float: left;
      margin-right: 15px;
      width: 80px;
  }
  </code></pre>
  
  <p>but it does not work and it is not applied to the previous <code>img</code> tag (I used FireBug and I can see that the style is not applied)</p>
  
  <p>Why? What am I missing? How can I correctly apply the style to all the img tags inside the div having <code>class="group-item"</code>?</p>