אקורדיון שירותים לחנות ספרים עצמאית

Build a "Independent Bookshop Offerings Accordion" React component.

CONCEPT: An offerings accordion for "Margins" with four rows: New fiction, Essays, Kids corner, Book club.

LAYOUT & CONTENT:
- Rows on 1px charcoal rules, mono index, title, chevron.
- Open row: 4px left bar in #1D4ED8, one-sentence detail and a 'Visit the shop' text link.

INTERACTIONS & MOTION:
- Detail panel height 0 ↔ auto with AnimatePresence, spring stiffness 300 damping 32.
- Left bar scaleY 0 → 1 origin-top; chevron rotates 180°.

DESIGN SYSTEM (non-negotiable):
- Palette: paper background #FAF9F6, deep charcoal #121212 for text and 1px borders, ONE warm accent: cobalt #1D4ED8 or terracotta #D9534F. Secondary surface #F2EFE8.
- Typography: Swiss / editorial. A tight grotesk for UI (Instrument Sans, Inter Tight or similar) with negative tracking on display sizes; an italic serif (Instrument Serif) used sparingly for one emphasized word.
- NO dark-mode neon, NO glow, NO glassmorphism, NO backdrop blur, NO purple-to-blue gradients, NO emoji icons. Solid fills, hairline rules, honest shadows (hard offset or none).
- Motion: Framer Motion with spring physics (type: "spring", stiffness 300-500, damping 20-35). Animate transform and opacity only. Respect prefers-reduced-motion via useReducedMotion().
- Icons: lucide-react, 1.5px stroke.
- Accessibility: real <button>/<a>/<label> elements, visible focus ring (2px cobalt, 3px offset), keyboard operable, aria attributes where state changes.

OUTPUT: one self-contained React component file (Tailwind CSS v4 utility classes, framer-motion, lucide-react), no external images, default export, ready to paste into a Next.js App Router page with "use client".