<html> <head> <!-- Bootstrap CSS--> <link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <main> <div class="container"> <div class="row"> <div class="col-md-12"> <div class="jumbotron"> <h1>404: Page Not Found</h1> <p>The page you are looking for does not exist.</p> </div> </div> </div> </div> </main> </body>