I built a UX and UI demo that completes a half-finished SaaS website for a placeholder product. The build inventories the framework as found: 18 colors with usage counts, 15 font sizes, 7 radii, 15 spacing values and 6 button variants. It merges colors by Lab distance into 8 tokens, snaps type to a 7 step 1.25 ratio scale and spacing to a 4 px based scale, and consolidates buttons into 3 variants, all 44 px tall. Contrast is measured before and after: 4 of 6 text pairings failed 4.5:1 before, all 10 pass after. On those tokens it finishes three working pages: a homepage with one primary action, a pricing page whose annual toggle computes the saving per plan, and a 3 field sign-up form with live password rules and specific error messages. Twelve feedback notes name the heuristic, severity and the page where each was applied. The build checks every site page for literal colors and writes nothing if any check fails.