body
{
    background-image: url(kathi.jpg);
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: center; 
    font-family: 'Oxygen', sans-serif;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}
.infobox {
    position: absolute;
    left: 50%;
    top: 50%;
    -webkit-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    background-color: #fff;
    color: #000;
    opacity: .7;
    padding: 20px;
    border: 5px solid #fff;
    border-radius: 10px;
  }