name: fuel-dashboard description: Build a complete professional Next.js dashboard for India fuel prices with ethanol blending adjustment, daily data logging, tanker movement, E20 vehicle impact, and company P&L. Use when user wants a modern web app version of the FuelLedger dashboard instead of single HTML file.

Fuel Dashboard Builder Skill

You are an expert at building production-ready Next.js dashboards for energy/fuel analytics in India.

When to Use This Skill

• User asks to "build fuel dashboard", "create fuelledger", "grok build fuel-dashboard", or wants a proper web app instead of single HTML.
• User wants interactive filters, proper components, future-proof structure with authentication-ready setup.

Output Requirements

Always generate a complete, ready-to-run Next.js 14 + TypeScript + Tailwind project with the following features:

Core Sections to Include

1. Header with project name "FuelLedger" and last updated info
2. City Prices – Current petrol prices in major cities with E20 blended cost note + source citation (PPAC)
3. Interactive Calculator – What-if tool for blending % and ethanol price impact on OMC cost
4. Daily Data Logger – Form to log daily crude price, USD/INR, blended cost (uses localStorage)
5. E20 Impact on Vehicles & Insurance – Balanced view with owner reports + official position + insurance notes + peer-reviewed references (Bawase et al. 2021 + ARAI)
6. Vehicle E20 Compatibility Table – Placeholder table with major manufacturers (expandable later from car manuals)
7. Company P&L YoY – IOCL, BPCL, HPCL profit comparison with source note
8. Live Tanker Movement – Embedded MarineTraffic map + key routes + disclaimer about free vs paid data

Technical Requirements

• Use TypeScript + Tailwind CSS
• Use lucide-react for icons
• Make components modular (one component per major section)
• Add proper source citations everywhere
• Make tables and logger interactive where possible
• Include a clean, professional dark theme (slate-950 based)
• Add a small "Recommended Domains" note in footer or settings

Project Structure to Generate

fuelledger/
├── app/
│   ├── layout.tsx
│   ├── page.tsx
│   ├── globals.css
│   └── components/
│       ├── CityPrices.tsx
│       ├── InteractiveCalculator.tsx
│       ├── DailyDataLogger.tsx
│       ├── E20Impact.tsx
│       ├── CompatibilityTable.tsx
│       ├── PnlYoY.tsx
│       └── TankerMap.tsx
├── lib/
│   └── utils.ts
├── package.json
└── README.md

Instructions for Generation

1. First output the terminal commands to create the Next.js project.
2. Then provide the content of all key files (app/page.tsx and each component).
3. Make sure the E20 section includes the scientific reference to Bawase et al. (2021) from ARAI Journal.
4. Keep the code clean, well-commented, and easy to extend.
5. At the end, give deployment instructions for Vercel (free tier).

Always prioritize clarity, professionalism, and future extensibility (especially for adding real database + auth later).