モバイルゲーム UI ハイライト VFX（宝箱・Tier Up・ボスドロップ）

Create a single HTML demo showcasing three mobile-game reward VFX presets: CHEST_OPEN, TIER_UP, BOSS_LOOT.

Tech: Canvas 2D or lightweight WebGL; no game engine.
Each preset includes:
- 0.0–2.0s timeline with labeled phases (anticipation, peak, settle).
- Particle emitter params (count, spread, gravity, drag, color over life).
- UI mock: centered card, rarity border (common/rare/epic/legendary hex colors).
- Screen shake envelope ( amplitude vs time ) and optional radial blur fake via scaled overlays.
- Performance budget comment: max draw calls, particle cap for 720p@60.

Export functions: playPreset(name), resetScene(). Use requestAnimationFrame.