.bb-bookblock {
	width: 700px;
	height: 410px;
	
}

ul.bb-custom-grid {
	list-style: none;
	margin: 0 auto 30px auto;
	padding: 0;
	display: block;	
}

/* Micro clearfix hack by Nicolas Gallagher http://nicolasgallagher.com/micro-clearfix-hack/ */
ul.bb-custom-grid:before,
ul.bb-custom-grid:after {
	content: " ";
    display: table;
}

ul.bb-custom-grid:after {
	clear: both;
}
/* end clearfix hack */

ul.bb-custom-grid li {
	left:0px;
	width: 900px;	
	height: 380px;
	padding: 10px 20px 50px 20px;
	position: relative;
	box-sizing: content-box;
	margin-bottom: 20px;
	background-image:url(../images/imagenes_tema_1/tema_1_ima_17_4.png);
	background-repeat:no-repeat;
}

ul.bb-custom-grid li:nth-child(odd) {
	margin-right: 20px;
}

ul.bb-custom-grid li:before,
ul.bb-custom-grid li:after{
	content: '';
	position: absolute;
	z-index: -2;
	bottom: 15px;	
	width: 50%;
	height: 20%;
	box-shadow: 0 15px 10px rgba(0, 0, 0, 0.7);
	-webkit-transform: rotate(-3deg);
	-moz-transform: rotate(-3deg);
	-ms-transform: rotate(-3deg);
	-o-transform: rotate(-3deg);
	transform: rotate(-3deg);
}

ul.bb-custom-grid li:after {
	right: 10px;
	left: auto;
	-webkit-transform: rotate(3deg);
	transform: rotate(3deg);
}


ul.bb-custom-grid nav {
	text-align:left;
	margin-top: 12px;
	padding-bottom: 5px;
}

ul.bb-custom-grid nav span {	
	height: 49px;
	cursor: pointer;
}