body{
padding:0;
font-family: Arial, Helvetica, sans-serif;
font-size:12px;
margin:0px auto auto auto;
color:#333333;
}
.preview_container{
width:980px;
margin:auto;
}
.iphone_container{
float:left;
float:left;
padding:40px 5px 5px 5px; 
}
.preview_content
{

}
.nav{
float:left;
padding:40px 0 0 0; 
width:300px;
}