body{
	width:980px;
	margin-top:30;
	margin-left:auto;
	margin-right:auto;
	margin-bottom:50;
	font-family:sans-serif;
}
p{
	font-size:16px;
	line-height:1.5;
	margin-top:0px;
	margin-bottom:5px;
}
h2{
	font-size:18px;
	margin-top:30px;
	margin-bottom:0;
}
img{
	vertical-align:bottom;
}
.explanation{
	width:400px;
	float:left;
}
.screenImage{
	width:540px;
	float:right;
}
section{
	margin-top:50px;
}
section:after{
	content:"";
	clear:both;
	display:block;
}