title: How to add shadow effects on icons like font-awesome
body: <p>I want to add a shadow on hover effect in my icon:</p>
  
  <p><a href="https://i.stack.imgur.com/CBotu.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CBotu.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/6rYO5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6rYO5.png" alt="enter image description here"></a></p>
  
  <p>Is there a way to add a shadow effect using css?
  The icon is from font-awesome. Thanks in advance.</p>