Bento Grid Animation

Create a premium bento grid dashboard section.

Requirements:
- Mixed card sizes (2 large hero cards + 3 medium + 1 wide bottom card)
- Dark glass cards with subtle purple accent (#8b5cf6)
- Smooth hover elevation with soft violet glow
- Animated line chart, bar chart and donut chart inside cards
- Real-time activity feed with staggered entrance
- Number counters that animate on scroll
- Fully responsive grid (collapses gracefully on mobile)
- Framer Motion for all transitions
- GPU accelerated, 60fps
- No layout shift

Inspired by Apple, Linear and Vercel dashboards.
Feel: premium, calm, data-rich, never busy.

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TECHNICAL SPEC (must be respected)

Stack:
- React 18 + TypeScript (strict), Tailwind CSS, Framer Motion
- No extra animation library, no canvas unless explicitly required

Design tokens:
- Base background #0a0a0f, surfaces rgba(255,255,255,0.04)
- Borders rgba(255,255,255,0.08), primary violet #8b5cf6, secondary #a855f7
- Radius 20-28px, backdrop-blur(24px), inner highlight inset 0 1px 0 rgba(255,255,255,0.12)
- Typography: tight tracking on headings (-0.02em), 15-16px body, muted text at 60% opacity

Motion rules:
- Entrance: opacity 0 -> 1, y 24 -> 0, duration 0.7s, ease [0.16, 1, 0.3, 1]
- Stagger children by 0.06s, trigger with useInView({ once: true, margin: "-80px" })
- Hover: translateY(-6px) + soft violet glow, 250ms
- Animate only transform, opacity and filter. 60fps, will-change on animated layers
- Respect prefers-reduced-motion: disable loops, keep final states

Quality bar:
- Fully responsive (mobile-first, no horizontal scroll)
- Accessible: semantic HTML, focus-visible rings, contrast AA
- No layout shift, no dummy lorem ipsum, realistic copy
- Clean, reusable, production-ready components with typed props

Deliver the complete code, ready to paste, with no placeholder comments.