title: Are URLs used in CSS case sensitive?
body: <p>An URL starting with capital letters:</p>
  
  <pre><code> .test{
       background:url('/Static/Common/background.png');
   }
  </code></pre>
  
  <p>An URL starting with small letters:</p>
  
  <pre><code> .test{
       background:url('/static/common/background.png');
   }
  </code></pre>
  
  <p>It is case-sensitive. But I downloaded a code from a website and it has mixture capitals and small letters but still works.</p>
  
  <p>what is the reason behind this ? can anyone clearly explain it.
  thanks </p>