message: added disabled for the primary button
diff: box-shadow: inset -1px 1px 1px 0 #CACACA;
  }
  +.btn:disabled {
  + cursor: not-allowed;
  +}
  +
  .btn.primary {
  color: #FFF;
  background-color: #6fc8ea;
  box-shadow: inset -1px 1px 1px 0 #53a4c3;
  }
  +.btn.primary:disabled {
  + background-color: #92d9f5;
  +}
  +
  .btn.danger {
  color: #FFF;
  background-color: #ff6b6b;
  