#stacks_in_15 {
	margin:  10px;
	padding:  10px;
}
 #stacks_in_17 .youtube_wrapper{ text-align:center;position:relative}#stacks_in_17 .youtube_wrapper img{cursor:pointer;z-index:1000;position:absolute;top:0;    width:100%;height:auto;} 

#stacks_in_17 {
	margin:  10px;
}
 #stacks_in_18 .youtube_wrapper{ text-align:center;position:relative}#stacks_in_18 .youtube_wrapper img{cursor:pointer;z-index:1000;position:absolute;top:0;    width:100%;height:auto;} 

#stacks_in_18 {
	margin:  10px;
}

#stacks_out_18 {
	width: 60%;
}