@keyframes af_keyframes_descargar_presentacion{

 from{
	opacity:0;
	top: -50px;

    }
 to{
 	opacity: 1;
 	top:0;

 }
}

@-webkit-keyframes af_keyframes_descargar_presentacion {
 from{
	opacity:0;
	top: -50px;

    }
 to{
 	opacity:1;
 	top:0;
}

@keyframes fade{
	from{
		opacity: .4;}

	to{opacity: 1;}	
}