{
  "name": "Virtual Piano",
  "short_name": "Piano",
  "description": "Chơi đàn piano trên trình duyệt – keyboard, metronome, Grand Piano voice.",
  "start_url": "/",
  "display": "standalone",
  "background_color": "#0f172a",
  "theme_color": "#0f172a",
  "icons": [
    {
      "src": "data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 192 192'><rect width='192' height='192' rx='32' fill='%230f172a'/><rect x='16' y='48' width='30' height='108' rx='4' fill='white'/><rect x='52' y='48' width='30' height='108' rx='4' fill='white'/><rect x='88' y='48' width='30' height='108' rx='4' fill='white'/><rect x='124' y='48' width='30' height='108' rx='4' fill='white'/><rect x='160' y='48' width='30' height='108' rx='4' fill='white'/><rect x='34' y='48' width='24' height='68' rx='4' fill='%231e293b'/><rect x='106' y='48' width='24' height='68' rx='4' fill='%231e293b'/></svg>",
      "sizes": "192x192",
      "type": "image/svg+xml",
      "purpose": "any maskable"
    }
  ]
}