#stacks_in_450{
	max-width: 1000px;margin: 0 auto;
}
#stacks_in_450{
	padding: 0px 0px 0px 0px;
}
@media screen and (min-width: 770px){
	#stacks_in_450{
		padding: 0px 0px 0px 0px;
	}
}
#stacks_in_643{
	max-width: 600px;margin: 0 auto;
}
#stacks_in_643{
	padding: 0px 0px 0px 0px;
}
@media screen and (min-width: 900px){
	#stacks_in_643{
		padding: 0px 20px 0px 20px;
	}
}
#stacks_in_673 {
	-moz-border-radius:  8px;
	-webkit-border-radius:  8px;
	border-radius:  8px;
}