body {
background-image: url(background.jpg);

-moz-background-size: cover;
-webkit-background-size: cover;
background-size: cover;
background-position: top center !important;
background-repeat: no-repeat !important;
background-attachment: fixed;
}

iframe {
display: block;
margin-left: auto;
margin-right: auto;
vertical-align: middle;
width: 45%;
max-width: 45%;
min-width: 640px;
height: 98%;
}

iframe.vcard {
float: right;
width: 45%;
max-width: 45%;
min-width: 640px;
height: 26%;
}

img {
float: left;
}