Penscratch 2: Fix Sidebar Layout

penscratch-2/style.css

@@ -1918,6 +1918,8 @@ div.sharedaddy div.sd-block {
 }
 @media screen and (min-width: 55em) {
 	.no-sidebar .site {
+		margin-right: auto; 
+		margin-left: auto;								
 		max-width: 872px;
 		padding: 54px 108px;
 	}