.bb-custom-wrapper,
.bb-bookblock {
	width: 100%;
	height: 500px;
}


.bb-custom-wrapper nav {
	bottom: 78px;
	left: 50%;
	margin-left:-39px;
	position: absolute;
	z-index: 250;
}

.bb-custom-wrapper nav span {
	position: absolute;
	width: 30px;
	height: 30px;
	top: 0;
	left: 0;
	background: #3962A4;
	border-radius: 50%;
	color: #fff;
	text-align: center;
	speak: none;
	cursor: pointer;
	font-size:40px;
	line-height:30px;
}

.bb-custom-wrapper nav span:hover {
	background: #384F79;
}

.bb-custom-wrapper nav span:last-child {
	left: 48px;
}

.scroller {
	height:500px;
}