style.css

  body {
    background-color: black;
  }

  /* http://stackoverflow.com/a/20593342/3745914 */
  #frame {
    width: 100vw; 
    height: 56.25vw; /* height:width ratio = 9/16 = .5625  */
    max-height: 100vh;
    max-width: 177.78vh; /* 16/9 = 1.778 */
    margin: auto;
    position: absolute;
    top:0;bottom:0; /* vertical center */
    left:0;right:0; /* horizontal center */
  }

  img#background {
    position: absolute;
    width: 100%;
    height: 100%;
  }

  #headline {
    position: absolute;
    background-color: white;
    z-index: 100;
    bottom: 2%;
    width: 80%;
    padding: 1%;
    margin: 1%;
    font-size: 24pt;
    font-weight: bold;
  }

  img#logo {
    position: absolute;
    z-index: 100;
    background-color: white;
    bottom: 2%;
    right: 0%;
    width: 13%;
    padding: 1%;
    margin: 1%;
    height: 7%;
  }