html {
	width: 100%;
	height: 100%;
	overflow: hidden;
}

body {
	width: 100%;
	height: 100%;
	overflow: hidden;
	font-size: 0.8em;
	font-family: "Courier New";
	color: #BBB;
	background-color: #333;
}

#contenedor {
	position: absolute;
	top: 50%;
	left: 50%;
	width: 0px;
	height: 0px;
}

#principal {
	width: 30em;
	height: 30em;
	top: -15em;
	left: -15em;
	position: relative;
	overflow: auto;
}

#archivo {
	position:absolute;
	left: 15em;
	top: -15em;
	width: 18em;
	
	
}

.icono {
	cursor: crosshair;
	float:left;
	margin:0.5em;
	width: 5em;
	height: 5em;
}