How to apply CSS style to class which is in another classes?
<p>I have the following HTML elements:</p>

<pre><code>&lt;div class="class1 class2 class3"&gt;
    &lt;div class="innerClass"&gt;
    &lt;/div&gt;
&lt;/div&gt;
</code></pre>

<p>I want to apply style to <code>innerClass</code> which is in classes : <code>class1</code>, <code>class2</code> , <code>class3</code> no more no less. I mean if there is <code>innerClass</code> in element with classes <code>class1</code>, <code>class2</code> the style should't be applied and if I have <code>innerClass</code> in element with classes <code>class1</code>, <code>class2</code> , <code>class3</code> , <code>class4</code> it shouldn't be applied either.</p>