html, body {
	height: 100%;
}

#contents {
	background-image: url("res/intro.jpg");
	background-repeat: no-repeat;
	background-size: cover;
	background-origin: padding-box;
	height: 90%;
	background-attachment: fixed;

}

#textos {
	opacity: 1;
}

.transparente {
	opacity: 0.7;
}