#stacks_in_4{
	max-width: px;margin: 0 auto;
}
#stacks_in_4{
	padding: px px px px;
}
@media screen and (min-width: px){
	#stacks_in_4{
		padding: px px px px;
	}
}
#stacks_in_2 {
	background-color: rgba(0, 0, 0, 0.24);
	margin:  20px;
	padding:  20px;
}