Magnetic Pull Button

Build a "Magnetic Pull Button" React component.

CONCEPT: A primary call-to-action that behaves like it is magnetized: as the pointer approaches, the button drifts toward it, and the label drifts even more, creating depth.

LAYOUT & CONTENT:
- Charcoal pill (#121212) with cream label 'Start a project' and an arrow icon; 1px charcoal outline ring offset by 6px that stays fixed.
- Wrap in a larger invisible hit area (padding 40px) to detect proximity.

INTERACTIONS & MOTION:
- Compute pointer offset from button center; button translates 35% of offset, label translates 55%; both springs stiffness 220 damping 15 mass 0.4.
- Release back to 0,0 on leave with the same spring (it should overshoot slightly).
- whileTap scale 0.95.

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".