body {
padding-bottom: 50px;
min-width: 320px;
width: 100%;
background: url(https://az659834.vo.msecnd.net/eventsairaueprod/production-mciaustralia-public/2b844015f25143a0b13f61c1ee8178ca) no-repeat center center fixed; 
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover; 
} 
div.main-form { 
background-color: rgba(255, 255, 255, 1); 
}