{
  "name": "Pool Chemical Calculator",
  "short_name": "Pool Calc",
  "description": "Free pool chemical calculator for chlorine, pH, alkalinity, shock and CYA dosing.",
  "start_url": "/",
  "display": "standalone",
  "background_color": "#f0f9ff",
  "theme_color": "#0077b6",
  "orientation": "portrait-primary",
  "lang": "en",
  "categories": ["utilities", "lifestyle"],
  "icons": [
    { "src": "/icons/icon-192.png", "sizes": "192x192", "type": "image/png", "purpose": "any maskable" },
    { "src": "/icons/icon-512.png", "sizes": "512x512", "type": "image/png", "purpose": "any maskable" }
  ]
}