DOWNLOAD BUTTON

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<!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>
    button{
	  
	  background-color: green;
	  color: white;
	  padding: 10px;
	  cursor: pointer;
	  font-size: 25px;
	}	
   .btn {
     width: 100%;
   }
  button:hover{
   background-color: white; 
   color: green;
  }   
</style>
</head>
<body>
   <h2> Download Button </h2>
   <button class="btn"><i class="fa fa-download"></i>Download </button>
   <h2>  Download button</h2>
   <button ><i class="fa fa-download"></i>Download </button>
</body>
</html>