.content_nav{
	width: 1245px;
	height: 665px;
	margin: 0px 0px;
	margin-bottom: 0px;
	overflow: hidden;
	padding-top: 0px;
}
.content_nav .time_line{
	width: 13809px;
	height: 665px;
	overflow: hidden;
	position: relative;
	background-image: url("../img/Actividad1/SB_M_G10_U03_L01_lineatiempo.png");
	background-position: 1174px -59px;
	background-size: 12579px 785px;
	background-repeat: no-repeat;
}
.content_nav .buttons{
	cursor: pointer;
	background: url(../img/arrow_right.png) no-repeat;
	position: absolute;
	display: inline-block;
	width: 41px;
	height: 41px;
}
.content_nav .buttons.next{
	top: 309px;
	left: 1201px;
}
.content_nav .buttons.prev{
	-moz-transform: rotate(180deg);
	-webkit-transform: rotate(180deg);
	transform: rotate(180deg);
	display: none;
	left: 6px;
	top: 305px;
}
.content_nav .time_line .item{
	width: 1245px;
	height: 665px;
	position: absolute;
	background-position: center;
	background-repeat: no-repeat;
	top: 0px;
}
.content_nav .time_line .item1{
	left: 0px;
	background-image: url("../img/Actividad1/SB_M_G10_U03_L01_actividad1.png");
	background-repeat: no-repeat;
	background-position: 10px 10px;
}
.content_nav .time_line .item2{
	left: 1245px;
}
.content_nav .time_line .item3{
	left: 2490px;
}
.content_nav .time_line .item4{
	left: 3735px;
}
.content_nav .time_line .item5{
	left: 4980px;
}
.content_nav .time_line .item6{
	left: 6225px;
}
.content_nav .time_line .item7{
	left: 7470px;
}
.content_nav .time_line .item8{
	left: 8715px;
}
.content_nav .time_line .item9{
	left: 9960px;
}
.content_nav .time_line .item10{
	left: 11205px;
}
.content_nav .time_line .item11{
	left: 12450px;
}
.content_nav .time_line .item .step{
	font-size: 2.19em;
	font-style: italic;
	width: 458px;
	position: absolute;
	top: 195px;
	left: 60px;
	line-height: 1.1em;
}
.content_nav .time_line .item.item1 .ins{
	font-size: 2.19em;
	width: 721px;
	position: absolute;
	top: -14px;
	right: 76px;
}
.content_nav .time_line .item.item1 .ins2{
	font-size: 2.13em;
	font-weight: bold;
	font-style: italic;
	text-align: center;
	width: 444px;
	position: absolute;
	top: 81px;
	right: 265px;
}
.content_nav .time_line .item.item1 ul.materials{
	font-size: 1.75em;
	width: 385px;
	position: absolute;
	bottom: -20px;
	left: 345px;
}
.content_nav .time_line .item.item1 ul.materials li{
	margin-bottom: 16px;
}

