.play:after{
	content: url('../img/actividad3/audifonos.png');
	position: absolute;
	top: -45px;
    left: 20px;
}
.play{
	position: absolute;
}
.play:before{
	content: url('../img/actividad3/play_btn.png');
	cursor: pointer;
}
.play.paused:before{
	content: url('../img/actividad3/pausa_btn.png');
}


.content_nav ol.sections > li:nth-child(1){
	background-image: url('../img/actividad3/SB_S_G11_U04_L05_act3_f01.png');
	background-position: 50% 50%;
}
.content_nav ol.sections > li:nth-child(1) .plays{
	position: absolute;
    top: 465px;
}
.content_nav ol.sections > li:nth-child(1) .plays > .play:nth-child(1){
	left: 15px;
}
.content_nav ol.sections > li:nth-child(1) .plays > .play:nth-child(2){
	left: 385px;
}
.content_nav ol.sections > li:nth-child(1) .plays > .play:nth-child(3){
	left: 760px;
}


.content_nav ol.sections > li:nth-child(2){
	background-image: url('../img/actividad3/SB_S_G11_U04_L05_act3_f02.png');
	background-position: 50% 50%;
}

.gge_contenido_S .act_content {
	background-image: url('../img/introduccion/base_fondo.png');
	background-repeat: no-repeat;
	background-position: 50% 100%;
}
.content_nav ol.sections > li:nth-child(2)  .play{
	top: 425px;
    left: 65px;
}

.content_nav ol.sections > li:nth-child(3){
	background-image: url('../img/actividad3/SB_S_G11_U04_L05_act3_f03.png');
	background-position: 50% 50%;
}

.content_nav ol.sections > li:nth-child(3)  .play{
	top: 185px;
    left: 145px;
}

.content_nav ol.sections > li:nth-child(4){
	background-image: url('../img/actividad3/SB_S_G11_U04_L05_act3_f04.png');
	background-position: 50% 50%;
}

.content_nav ol.sections > li:nth-child(4)  .play{
	top: 415px;
    left: 95px;
}