.orange {
	width:100px;
	height: auto;
	color: #fef4e9;
	padding: 5px;
	border: solid 1px #da7c0c;
	background: #f78d1d;
	background: -webkit-gradient(linear, left top, left bottom, from(#faa51a), to(#f47a20));
	background: -moz-linear-gradient(top,  #faa51a,  #f47a20);
	filter:  progid:DXImageTransform.Microsoft.gradient(startColorstr='#faa51a', endColorstr='#f47a20');
	display: inline-block;
	outline: none;
	cursor: pointer;
	text-align: center;
	text-decoration: none;
	font: 14px/100% Arial, Helvetica, sans-serif;
	padding: ;
	text-shadow: 0 1px 1px rgba(0,0,0,.3);
	-webkit-border-radius: .5em;
	-moz-border-radius: .5em;
	border-radius: .5em;
	
}
.orange p {
	font-size: 1em;
	font-family: Arial, Helvetica, sans-serif;	
}
.orange:hover {
	background: #f47c20;
	background: -webkit-gradient(linear, left top, left bottom, from(#f88e11), to(#f06015));
	background: -moz-linear-gradient(top,  #f88e11,  #f06015);
	filter:  progid:DXImageTransform.Microsoft.gradient(startColorstr='#f88e11', endColorstr='#f06015');
	-webkit-box-shadow: 0 1px 2px rgba(0,0,0,.2);
	-moz-box-shadow: 0 1px 2px rgba(0,0,0,.2);
	box-shadow: 0 1px 2px rgba(0,0,0,.2);
}
.orange:active {
	color: #fcd3a5;
	background: -webkit-gradient(linear, left top, left bottom, from(#f47a20), to(#faa51a));
	background: -moz-linear-gradient(top,  #f47a20,  #faa51a);
	filter:  progid:DXImageTransform.Microsoft.gradient(startColorstr='#f47a20', endColorstr='#faa51a');
}

http://www.webdesignerwall.com/tutorials/css3-gradient-buttons/

Pure CSS button with rounded corners, gradient and shadow

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