DAY STACK — selects both days: all selected rooms summed as one color; +1/-1 cubes show change vs OLD.
+1
-1
OLD — same, for the OLD scrape (softer colors). Exclusive with NEW.
NEW — each room type as its color; cubes stack to total units left on the NEW scrape.
NEW and OLD replace each other. DAY STACK turns both on; clicking NEW or OLD exits DAY STACK to that scrape only.
