.main-bottom {margin-top:30px;height:50px;}
.main-iframe iframe {min-height:400px;}
@media (min-width: 40em) {
	.main-iframe {position:absolute;top:150px;bottom:80px;left:0;right:0;}
	.main-iframe iframe {min-height:0;}
	.main-bottom {position:absolute;bottom:0;left:0;right:0;}
	.main {position:fixed;width:100%;height:100%;}
}