html, body{
    height: 100%;
  }
  body { 
              background-image: url(/assets/images/background.png) ;
              background-position: center center;
              background-repeat:  no-repeat;
              background-attachment: fixed;
              background-size:  cover;
              background-color: #999;
    
  }
  
  div, body{
    margin: 0;
    padding: 0;
    font-family: exo, sans-serif;
    
  }
  .wrapper {
    height: 100%; 
    width: 100%; 
  }
  
  .message {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    width: 100%; 
    height:45%;
    bottom: 0; 
    display: block;
    position: absolute;
    background-color: rgba(0,0,0,0.6);
    color: #fff;
    padding: 0.5em;
  }