
#%id% .stacks_left {
	float:left;
	width:%(%id=split% - %id=gutter%)%%;
}

#%id% .stacks_right {
	float:right;
	width:%(%id=split% - %id=gutter%)%%;
}

#%id% .stacks_middle {
	position:relative;
	margin:0 auto;
	width:%(100 - %(2 * %(%id=split% + %id=gutter%)%)%)%%;
}