Tabbed Showcase Bento

Build a "Tabbed Showcase Bento" React component.

CONCEPT: A product capability section with three tabs (Design, Build, Launch). Each tab rearranges a 4-tile bento into a different composition and changes copy.

LAYOUT & CONTENT:
- Segmented control: pill container with 1px charcoal border; active pill is a charcoal fill that slides between tabs via layoutId.
- Below, four tiles whose grid spans differ per tab (e.g. Design: 2x2 + three 1x1; Build: three-wide banner + 1x1 stack; Launch: two tall columns).

INTERACTIONS & MOTION:
- Active indicator uses layoutId='tab-pill' with spring stiffness 500 damping 35.
- Tiles use layout so they glide into the new arrangement; text crossfades via AnimatePresence mode='wait'.
- Arrow keys move between tabs (role='tablist').

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".