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Build a "Boxing Gym Hero with Spring Word Rotator" React component.

CONCEPT: A hero section for "Third Round", a boxing gym. Big grotesk headline ending in a rotating italic serif word, a short deck line and one magnetic CTA.

LAYOUT & CONTENT:
- Top meta row: brand name left, 'Est. 2014' right, 1px charcoal rule below.
- Headline: 'We keep it' + rotating word (sharp, loud, fit, ready) in italic serif, colored #D9534F.
- CTA pill: 'Try a free class' in charcoal with an arrow.

INTERACTIONS & MOTION:
- Rotate the word every 2s with AnimatePresence mode='popLayout' inside an overflow-hidden mask (y 100% → 0 → -100%), spring stiffness 400 damping 30.
- CTA follows the pointer within its padding (35% of offset), spring stiffness 220 damping 15.

DESIGN SYSTEM (non-negotiable):
- Palette: paper background #FAF9F6, deep charcoal #121212 for text and 1px borders, ONE human 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".