* {
	margin: 0;
	padding: 0;
}

body {
	font-size: 62.5%;
	font-family: Helvetica, sans-serif;
}

.clear {
	clear: both;
}

#page-wrap {
	width: 1100px;
	margin: 0 auto;
	padding: 0px;
	margin-top: 40px;
	height: 850px;
}

.button {
	float: left;
}
#libro1 {
	display: block;
	padding: 30px;
	height: 500px;
	width: 600px;
	margin: 0 auto;
}
#libro1-button {
	opacity: 1.0;
	width: 150px;
	height: 150px;
	float: left;
}
#libro2 {
	display: none;
	padding: 30px;
	height: 350px;
	width: 600px;
	margin: 0 auto;
}
#libro2-button {
	opacity: 0.2;
	width: 150px;
	height: 150px;
	float: left;
}

#libro3 {
	display: none;
	padding: 30px;
	height: 350px;
	width: 600px;
	margin: 0 auto;
}
#libro3-button {
	opacity: 0.2;
	width: 150px;
	height: 150px;
	float: left;
}

#libro4 {
	display: none;
	padding: 30px;
	height: 350px;
	width: 600px;
	margin: 0 auto;
}
#libro4-button {
	opacity: 0.2;
	width: 150px;
	height: 150px;
	float: left;
}

#libro5 {
	display: none;
	padding: 30px;
	height: 350px;
	width: 600px;
	margin: 0 auto;
}
#libro5-button {
	opacity: 0.2;
	width: 150px;
	height: 150px;
	float: left;
}

#botones{
	width: 900px;
	float: left;
	margin: 30px 0px 0px 170px;
}

#contenidocursos{
	float: left;
	width: 600px;
}

img.imageleft { float: left; margin: 15px; }
img.imageright { float: right; margin: 15px; }