{
  "name": "The Grammar Index — 英文法学習",
  "short_name": "Grammar Index JP",
  "description": "日本人英語学習者のための文法ガイド。300以上のトピックを、定義・用例・クイズで学べます。",
  "lang": "ja",
  "start_url": "./",
  "display": "standalone",
  "orientation": "portrait-primary",
  "background_color": "#F5F6FA",
  "theme_color": "#1B5E9E",
  "prefer_related_applications": false,
  "icons": [
    {
      "src": "icons/favicon_32x32.png",
      "sizes": "32x32",
      "type": "image/png"
    },
    {
      "src": "icons/ic_launcher_adaptive_mdpi_48x48.png",
      "sizes": "48x48",
      "type": "image/png"
    },
    {
      "src": "icons/ic_launcher_adaptive_hdpi_72x72.png",
      "sizes": "72x72",
      "type": "image/png"
    },
    {
      "src": "icons/ic_launcher_adaptive_xhdpi_96x96.png",
      "sizes": "96x96",
      "type": "image/png"
    },
    {
      "src": "icons/ic_launcher_adaptive_xxhdpi_144x144.png",
      "sizes": "144x144",
      "type": "image/png"
    },
    {
      "src": "icons/apple_touch_180x180.png",
      "sizes": "180x180",
      "type": "image/png"
    },
    {
      "src": "icons/ic_launcher_adaptive_xxxhdpi_192x192.png",
      "sizes": "192x192",
      "type": "image/png",
      "purpose": "any maskable"
    },
    {
      "src": "icons/ic_launcher_adaptive_play_store_512x512.png",
      "sizes": "512x512",
      "type": "image/png",
      "purpose": "any maskable"
    }
  ]
}