{
  "name": "牛牛 NiuNiu",
  "short_name": "牛牛",
  "description": "中国式カードゲーム「牛牛」。いつでも、どこでも。",
  "start_url": "./index.html",
  "display": "standalone",
  "orientation": "portrait",
  "background_color": "#0a1a0f",
  "theme_color": "#d4af37",
  "icons": [
    {"src": "icons/icon-192x192.png", "sizes": "192x192", "type": "image/png"},
    {"src": "icons/icon-512x512.png", "sizes": "512x512", "type": "image/png"},
    {"src": "icons/icon-180x180.png", "sizes": "180x180", "type": "image/png"},
    {"src": "icons/icon-maskable-512x512.png", "sizes": "512x512", "type": "image/png", "purpose": "maskable"}
  ]
}