.ejerciciochecks{
	position:relative;
}

.ejerciciochecks input{
	display:none;
}
.ejerciciochecks .checkbox{
	width:20px;
	height:20px;
	background-color:#000;
	background-repeat:no-repeat;
	background-position:50% 50%;
	position:absolute;
	cursor:pointer;
	
	opacity:0.8;
	-webkit-border-radius: 3px;
	-moz-border-radius: 3px;
	border-radius: 3px;
}

.ejerciciochecks .checkbox.checked{
	background-image:url('check-ok-grey.png');
}


.ejerciciochecks .checkbox.error{
	background-image:url('check-cross-red.png');
}


.ejerciciochecks .checkbox.correcta.error{
	background-image:url('check-ok-green.png');
}

.ejerciciochecks .etiqueta-check{
	font-size:14px;
	position:absolute;
	text-transform:uppercase;
	font-weight:bold;	
}