.btn {
	display: block;
	position: relative;
	margin: 2px;
	_margin: 1px;
	padding: 5px;
	_padding: 2px;
	color: #fff;
	font: bold 1.2em Arial, sans-serif;
	_font: bold 1.1em Arial, sans-serif;
	text-decoration: none;
	text-align: center;
	cursor: pointer;
	width: 147px;
}
.btn * { font-style: normal; background-image: url(btn.png); background-repeat: no-repeat; display: block; position: relative; }

.btn i { background-position: top left; position: absolute; margin-bottom: -5px;  top: 0; left: 0; width: 5px; height: 5px; }
.btn span { background-position: bottom left; left: -5px; padding: 0 0 5px 10px; _padding: 0 0 2px 20px; margin-bottom: -5px; }
.btn span i { background-position: bottom right; margin-bottom: 0; position: absolute; left: 100%; width: 10px; height: 100%; top: 0; }
.btn span span { background-position: top right; position: absolute; right: -10px; margin-left: 10px; top: -5px; height: 0; }

* html .btn span,
* html .btn i { float: left; width: auto; background-image: none; cursor: pointer; }

.btn.Fil { background: #4169E1; }
.btn.Cul { background: #EAC000; }
.btn.Vol { background: #B22222; }
.btn.NA { background: #006400; }
.btn.Not { background: #FF8C00; }
.btn:hover { background-color: #222222; }
.btn:active { background-color: #444444; }
.btn[class] { background-image: url(btn_shade.png); background-position: bottom; }

* html .btn { border: 3px double #aaa; }
* html .btn.Fil { border-color: #4169E1; }
* html .btn.Cul { border-color: #EAC000; }
* html .btn.Vol { border-color: #B22222; }
* html .btn.NA { border-color: #006400; }
* html .btn.Not { border-color: #FF8C00; }
* html .btn:hover { border-color: #a00; }
/*Adaptado de http://www.monc.se/kitchen/59/scalable-css-buttons-using-png-and-background-colors*/