{
  "name": "Hello World — Particle Message Wall",
  "short_name": "Hello World",
  "description": "A live Swiss-style typographic stage where every visitor's message floats across a shared canvas for 120 seconds.",
  "start_url": "/",
  "display": "standalone",
  "background_color": "#ffffff",
  "theme_color": "#ffffff",
  "orientation": "any",
  "categories": [
    "business",
    "productivity",
    "communication"
  ],
  "lang": "en",
  "icons": [
    {
      "src": "icon-192x192.png",
      "sizes": "192x192",
      "type": "image/png",
      "purpose": "any"
    },
    {
      "src": "icon-512x512.png",
      "sizes": "512x512",
      "type": "image/png",
      "purpose": "any"
    },
    {
      "src": "icon-1024x1024.png",
      "sizes": "1024x1024",
      "type": "image/png",
      "purpose": "any"
    }
  ]
}