STYLING THE LEVEL

Run
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>HTML</title>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<style>
    span {
	  padding: 16px;
	  height: 10px;
	  width: 100px;
	  margin: 5px;
	  font-size: 25px;
	  box-shadow: 2px 3px 2px 3px rgba(0,0,0,0.5);
	}
	.label-1 {
	   color: green;
     }
	.label-2 {
	   color: yellow;
	}
	.label-3 {
	   color: red;
	}
   .label-1:hover {
      background-color: green;
	  color: black;
	  
   }
   .label-2:hover {
      background-color: yellow;
	  color: black;
	  
   }
   .label-3:hover {
      background-color: red; 
	  color: black;
      
   }
  
</style>
</head>
<body>
 <div class="container">
  <h2> Study Topics </h2>
  <p> Hover over the labels</p>
  <span class="label-1">Easy </span>
  <span class="label-2">Medium </span>
  <span class="label-3">Difficult </span>
  </div>
</body>
</html>