{
  "name": "Engineering Calculator Hub",
  "short_name": "EngCalc Hub",
  "description": "Plant, instrumentation, and process engineering calculators — transmitter scaling, DP flow, orifice sizing, control valves, thermal plant estimation, protection setpoints, and more.",
  "start_url": "./index.html",
  "id": "./index.html",
  "scope": "./",
  "display": "standalone",
  "orientation": "any",
  "background_color": "#0d1117",
  "theme_color": "#0d1117",
  "lang": "en",
  "categories": ["education", "productivity", "utilities"],
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    { "src": "./assets/icons/icon-maskable-512.png", "sizes": "512x512", "type": "image/png", "purpose": "maskable" }
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}