Accordion room groups

You are building one self-contained, fully interactive wireframe-style React
component that demonstrates a single hotel "Room Normalizer" concept.

# Concept
- Number: 2 of 14
- Section: normalizer
- Name: Accordion room groups
- Tagline: Collapsible groups
- One-line summary: Each room type is a collapsible header with rate count and price-from. Users expand what they care about.

# Framing
Optimizes for properties with many room types where seeing every rate at once would overwhelm. The collapsed state acts as a triage view; expansion is opt-in per group.

# What this is
Each room type is a collapsible header showing rate count and price-from. Users expand the groups they care about; others stay collapsed.

# Why it works
Tames pages with many room types. The header summary (count + lowest price) lets users triage groups before drilling in. Solves vertical bloat without removing options.

# Best use case
Properties with 4+ room types and dense rate inventory where seeing everything at once would overwhelm.

# Tradeoffs / risks
Hidden inventory means users may miss a competitive rate. Extra click cost for power users who want full visibility. Default open/closed state matters a lot.

# UX notes (scannability · normalization · booking confidence · provider transparency)
Group meta (count, from-price) is the normalization payoff signal — the user sees consolidation working. Rate detail only appears once expanded. Booking confidence tied to per-row pills inside the open group.

# Visual + interaction requirements
- Wireframe fidelity: monochrome, system UI, no brand color. Use Tailwind
  utility classes only. No images. Use simple borders, muted backgrounds,
  and mono labels for meta text (uppercase, tracking-widest, text-[10px]).
- Canvas width: 764px, centered. Internal content respects that frame.
- Context: this lives inside a hotel PDP "Rooms & Rates" section. Assume
  3 normalized room types (King, Queen, Double Queen) with 5–8 bookable
  rates each. Invent realistic mock data inline — rate label, bed, meals
  (room only / breakfast included), cancellation (free until N / non-refundable),
  payment (pay now / pay at hotel), price per night.
- Fully interactive: every control the concept implies must work in-browser
  with React state only — no backend, no router. Examples: accordions expand,
  tabs filter, sort headers sort, "Show N more" reveals rows, builder toggles
  recompute price live, sticky CTAs update with selection.
- Accessibility: real <button> elements, keyboard focus rings, aria-expanded
  on disclosure controls, aria-pressed on toggles.

# Deliverable
- A single default-exported React component file using TypeScript + Tailwind.
- No external UI library. Inline any small primitives you need.
- Include the mock data inline at the top of the file.
- File should run as-is when dropped into a Vite + React + Tailwind project.

Build only this concept. Do not generate the other 13.