style.css

<style type="text/css">
  body {
    background-color: #FFFFFF;
    margin: 0px;
  }
  @media screen and (orientation:portrait)
  {
    #portrait_hype_container {
      display: block;}
    #landscape_hype_container {
      display: none;}}

  @media screen and (orientation:landscape)
  {
    #portrait_hype_container {
      display: none;}
    #landscape_hype_container {
      display: block;}}
</style>