Squish Press Button

Build a "Squish Press Button" React component.

CONCEPT: Three buttons (primary terracotta, secondary cream, tertiary cobalt) that feel like physical keys: a hard 4px charcoal offset shadow that collapses as the key is pressed.

LAYOUT & CONTENT:
- Each button: 1.5px charcoal border, rounded-xl, bold label, shadow '4px 4px 0 #121212'.
- Labels: 'Add to cart', 'Save draft', 'Share'.

INTERACTIONS & MOTION:
- On click each key confirms in place for 1.4s (Added / Saved / Link copied with a check): the label slides up and out, the new one slides in from 14px below with a 2px blur (220ms ease-out, exit 120ms).
- whileHover: translate -1px,-1px and shadow grows to 5px 5px.
- whileTap: translate 4px,4px, shadow 0 0 0, scaleY 0.97 scaleX 1.02 (a squish).
- Spring stiffness 600 damping 20 so release has a tiny bounce.

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".