.shadow {
	padding: 20px;
	border: 1px solid #f0f0f0;
	border-bottom: 2px solid #ccc;
	-webkit-border-radius: 5px;
	-moz-border-radius: 5px;
	border-radius: 5px;
}

.pressed {
	color: #fff;
	padding: 20px;
	background: #111;
	border: 1px solid #000;
	border-right: 1px solid #353535;
	border-bottom: 1px solid #353535;
	-webkit-border-radius: 5px;
	-moz-border-radius: 5px;
	border-radius: 5px;
}

beveled.light {
	outline: 1px solid #ddd;
	border-top: 1px solid #fff;
	padding: 10px;
	background: #f0f0f0;
}

beveled.dark {
	outline: 1px solid #111;
	border-top: 1px solid #555;
	padding: 10px;
	background: #333;
}

http://www.sohtanaka.com/web-design/css-border-tricks-tutorial

Borders – Shadow,  Pressed, Beveled

CSS