{
  "name": "PropTools — Satellite Propulsion & Mass Budget Calculators",
  "short_name": "PropTools",
  "description": "Free browser-based calculators for spacecraft propulsion and mass budgeting.",
  "start_url": "./index.html",
  "display": "standalone",
  "background_color": "#f8fafc",
  "theme_color": "#16a34a",
  "icons": [
    { "src": "icons/icon-192.png", "sizes": "192x192", "type": "image/png" },
    { "src": "icons/icon-512.png", "sizes": "512x512", "type": "image/png", "purpose": "any maskable" }
  ]
}