.back a {
	display: block;
	background: #4D9EB4;
	width: 185px;
	margin: 45px auto 20px auto;
	padding: 5px;
	color: white;
	font-weight: bold;
	text-decoration :none;
	text-shadow: -1px -1px 0 #328197;
	clear: both;
	-webkit-border-radius: 20px 0 20px 20px;
	-moz-border-radius: 20px 0 20px 20px;
	border-radius: 20px 0 20px 20px;
}
.back a:hover,.back a:focus {
	text-decoration: underline;
}

@media (max-width:640px) {
	body {
		width: auto;
	}
}