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    <p>Great that you found out the solution. But im trying to explain what happened behind the scene.</p> <p>The way you are using the css <strong>is not a general convention</strong>. This facility comes with some additional gem. Check this link <strong><a href="https://stackoverflow.com/a/4564922/1160106">https://stackoverflow.com/a/4564922/1160106</a></strong>. With these gems you are able to design your css more <a href="http://en.wikipedia.org/wiki/Don%27t_repeat_yourself" rel="nofollow noreferrer"><strong>DRY</strong></a> way.</p> <hr> <h2>General Convention</h2> <p>if you want to apply style to the following <code>h1</code> element</p> <pre><code># Here "store" class is the parent element of "h1" &lt;div class="store"&gt; &lt;h1&gt; some text &lt;/h1&gt; &lt;/div&gt; </code></pre> <p>Will require following way of css</p> <pre><code>#Here also "store" is written before "h1" .store h1 { #some designs } </code></pre> <hr> <h2>Whats happening in your case?</h2> <p>Probably you are maintaining controller wise css files. And presuming that you have a <code>stores_controller</code>. Thats why the classes for your <code>stores_controller</code> is encapsulated in <code>.store {}</code> block. Like</p> <pre><code>.store { h3 {font-size: 120%;} } </code></pre> <p>So it is clear that your <code>h3</code> elements require a parent element having <code>store</code> class. And you are doing so by adding <code>class="&lt;%= controller.controller_name %&gt;"</code> with your <code>body</code> tag. Undoubtedly the <code>&lt;body&gt;</code> tag is parent of all following nodes. Now when you are hitting <code>stores_controller</code> it sets <code>class="store"</code> and your styles are working.</p> <p>The approach is really <a href="http://en.wikipedia.org/wiki/Don%27t_repeat_yourself" rel="nofollow noreferrer">DRY</a> and recommendable. </p>
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    1. COThank you for your explanation. I was aware this isn't normal css, and what was happening behind the scenes, however, since I am new to Rails, I didn't know how it worked in Rails. I just didn't know whether the class name should be somewhere or not. I suspected Rails "connected" somehow the stylesheet to this specific controller view. However, when I figured out the solution, I found out it was a lot more straightforward than I expected :)
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