{
  "name": "Guitar Fretboard Note Trainer",
  "short_name": "Fretboard",
  "description": "Interactive guitar fretboard note memorization trainer with realistic visuals and audio synthesis.",
  "start_url": "./",
  "scope": "./",
  "display": "standalone",
  "background_color": "#1d1410",
  "theme_color": "#1d1410",
  "orientation": "any",
  "lang": "en",
  "categories": ["education", "music", "games"],
  "icons": [
    { "src": "icon-192.png", "sizes": "192x192", "type": "image/png", "purpose": "any" },
    { "src": "icon-512.png", "sizes": "512x512", "type": "image/png", "purpose": "any" },
    { "src": "icon-maskable-512.png", "sizes": "512x512", "type": "image/png", "purpose": "maskable" }
  ]
}