helloworld/public/stylesheets/application.css

   1 body {
   2   margin-top: 100px;
   3   text-align: center;
   4   background-color: black;
   5   color: white;
   6   font-size: 400%;
   7 }
   8
   9 input {
  10   background-color: #222;
  11   border: 2px solid #888;
  12   color: white;
  13   font-size: 100%;
  14   text-align: center;
  15 }