Service price list with tabs

Built for tradespeople and building firms: each tab shows a table of services with a unit badge (per hour, flat rate, per m²), what is included and the price, prefixed with "from" when it depends on the job. The VAT switch recomputes every price from the pre-tax amount and the VAT rate declared on the component, rounded to the cent as on a quote. Accessibility: keyboard tabs (arrows, Home, End) with tablist, tab and tabpanel roles; tables with captions and row headers; aria-pressed toggle buttons whose change is announced; AA contrast in light and dark; transitions disabled with prefers-reduced-motion. Without JavaScript every category stays readable as a captioned table, prices including VAT.