html, body {
	background:#669EFF;
	width:900px;
	margin: auto;
	
}

header{
	height:50px;
}

article{
	width:265px;
	float:left;
	margin: 5px;
}

img{
	-webkit-border-radius: 15px;
	-moz-border-radius: 15px;
	border-radius: 15px;
}

footer{
	font-size: 0.5em;
	height: 50px;
        position: fixed;
        bottom: 0;	
	text-align: center;
	
}