Build an interactive ROI calculator as a single-page web app, aimed at public-sector sales conversations. The goal is to let a prospect adjust a few inputs and instantly see the projected cost savings from automating their support/security operations, with the methodology shown transparently so the numbers feel credible. Trigger it via a single public HTTP route (e.g. /roi-calculator) that serves the page directly — no cron, upstream, or email trigger, and no backend data fetch. The page should let visitors adjust inputs like ticket/alert volume, average handle time, percentage of work automated, team size, and analyst hourly cost — using sliders that also accept typed values. As they change inputs, animate the projected hard savings (labor/time) and soft savings, and update the results in real time. Include selectable presets for common buyer profiles (federal agency, state agency, city/county, higher education, major metro), an animated hero diagram illustrating the alerts → orchestration → automated actions → savings flow, benchmark/context cards, and an expandable methodology section explaining how each number is derived. Design it as a polished, branded, production-grade marketing page with a distinctive visual identity. Keep it self-contained: all calculations run client-side, so no connectors or external APIs are required. If you later want to capture leads or share results, you could post submissions to a CRM or your team's chat tool — but that's optional and not part of the core build. Tools used: 3B React step (single public route, client-side only), recharts, lucide-react, shadcn/ui components — no external APIs or connectors