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  1. <html>
  2. <head>
  3. <!-- Bootstrap CSS-->
  4. <link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css" rel="stylesheet">
  5. </head>
  6. <body>
  7. <main>
  8. <div class="container">
  9. <div class="row">
  10. <div class="col-md-12">
  11. <div class="jumbotron">
  12. <h1>404: Page Not Found</h1>
  13. <p>The page you are looking for does not exist.</p>
  14. </div>
  15. </div>
  16. </div>
  17. </div>
  18. </main>
  19. </body>