title: What is the purpose of a dot before an additional CSS property?
body: <p>This is what I have in the code: </p>
  
  <pre><code>min-height: 35px;
  .min-height: 25px;
  }
  </code></pre>
  
  <p>What does the second line do? I assume it serves cross browser styling purposes but not sure which one for.</p>