feat: premium landing page and enhanced README

Author: kiku-jw

README.md

@@ -1,111 +1,141 @@
+<div align="center">
+  
 # Chart2CSV
 
+### Zero-Click AI Chart Data Extraction
+
 **Extract data from chart images to CSV. No clicking required.**
 
-[![Demo](https://img.shields.io/badge/Try-Live_Demo-brightgreen)](https://kiku-jw.github.io/Chart2CSV/)
-[![Python](https://img.shields.io/badge/Python-3.8+-blue)](https://python.org)
-[![License](https://img.shields.io/badge/License-MIT-blue)](LICENSE)
+[Live Demo](https://kiku-jw.github.io/Chart2CSV/) · [Documentation](https://github.com/kiku-jw/Chart2CSV/wiki) · [Report Bug](https://github.com/kiku-jw/Chart2CSV/issues)
+
+[![Demo](https://img.shields.io/badge/demo-live-00ff88?style=for-the-badge)](https://kiku-jw.github.io/Chart2CSV/)
+[![License](https://img.shields.io/badge/license-MIT-blue?style=for-the-badge)](LICENSE)
+[![Python](https://img.shields.io/badge/python-3.8+-3776ab?style=for-the-badge)](https://python.org)
+
+---
+
+</div>
 
-## What is Chart2CSV?
+## ⚡ The Problem
 
-Chart2CSV is a tool that reads chart images and extracts the data as CSV.
+You have a chart image from a research paper, report, or website. You need the actual numbers.
 
-**Input:** A picture of a chart (PNG, JPG)  
-**Output:** CSV file with x,y coordinates
+**Traditional tools** make you click each data point manually. That takes 5-30 minutes per chart.
 
-Works with line charts, scatter plots, and bar charts.
+**Chart2CSV** uses AI to read the chart automatically. Drop image → Get CSV. Done in seconds.
 
-## Quick Start
+---
+
+## 🚀 Quick Start
 
 ```bash
-# Install
 pip install chart2csv
+```
 
-# Extract data from a chart
-python -m chart2csv.cli.main chart.png
-
-# Output: chart.csv with the extracted data
+```bash
+python -m chart2csv.cli.main your_chart.png
 ```
 
-## Live Demo
+That's it. Check `your_chart.csv` for the extracted data.
 
-**[Try it in your browser →](https://kiku-jw.github.io/Chart2CSV/)**
+---
 
-No installation needed. Uses AI to read your chart.
+## 🌐 Try Online
 
-## Why Chart2CSV?
+**[Open Live Demo →](https://kiku-jw.github.io/Chart2CSV/)**
 
-| Tool | How it works | Speed |
-|------|--------------|-------|
-| WebPlotDigitizer | Click each point manually | Slow |
-| PlotDigitizer Pro | Semi-automatic, paid | Medium |
-| **Chart2CSV** | AI reads automatically | **Fast** |
+No installation needed. Works in your browser.
 
-## Features
+---
 
-- **Zero-click extraction** — AI understands your chart
-- **Works offline** — Uses local OCR by default
-- **Mistral AI option** — Better accuracy with `--use-mistral`
-- **Batch processing** — Process folders of charts
-- **Visual verification** — See what was detected with `--overlay`
+## ✨ Features
 
-## Usage Examples
+| | Feature | Description |
+|---|---|---|
+| ⚡ | **Zero-Click** | AI understands your chart automatically |
+| 🧠 | **Smart OCR** | Mistral Vision reads axis labels accurately |
+| 🔒 | **Privacy** | Runs offline by default with Tesseract |
+| 📊 | **Multi-Chart** | Line, scatter, bar charts supported |
+| ⚙️ | **CLI** | Batch process folders of charts |
+| ✓ | **Overlay** | Visual verification of detected points |
 
-```bash
-# Basic extraction
-python -m chart2csv.cli.main chart.png
+---
 
-# Use AI for better accuracy
-python -m chart2csv.cli.main chart.png --use-mistral
+## 📊 Comparison
 
-# Process multiple charts
-python -m chart2csv.cli.main folder/ --batch --output-dir results/
+| | WebPlotDigitizer | PlotDigitizer Pro | **Chart2CSV** |
+|---|---|---|---|
+| **Method** | Manual clicking | Semi-auto | AI automatic |
+| **Speed** | 5-30 min | 2-10 min | **Seconds** |
+| **Price** | Free | Paid | **Free** |
+| **Offline** | ✓ | ✗ | ✓ |
+| **CLI/API** | ✗ | ✗ | ✓ |
+| **AI OCR** | ✗ | ✗ | ✓ |
 
-# Verify with overlay
-python -m chart2csv.cli.main chart.png --overlay check.png
-```
+---
 
-## Supported Charts
+## 💻 Usage
+
+### Basic
+```bash
+python -m chart2csv.cli.main chart.png
+```
 
-- ✅ Line charts
-- ✅ Scatter plots
-- ✅ Bar charts
-- ✅ Linear and log scales
+### With AI (better accuracy)
+```bash
+export MISTRAL_API_KEY=your_key
+python -m chart2csv.cli.main chart.png --use-mistral
+```
 
-## Installation
+### Batch processing
+```bash
+python -m chart2csv.cli.main charts/ --batch --output-dir results/
+```
 
+### Visual verification
 ```bash
-pip install chart2csv
+python -m chart2csv.cli.main chart.png --overlay check.png
 ```
 
-For offline OCR, also install Tesseract:
-- macOS: `brew install tesseract`
-- Ubuntu: `apt-get install tesseract-ocr`
-- Windows: [Download installer](https://github.com/UB-Mannheim/tesseract/wiki)
+---
 
-## Documentation
+## 📖 Documentation
 
+- [Installation](https://github.com/kiku-jw/Chart2CSV/wiki/Installation)
 - [Quick Start](https://github.com/kiku-jw/Chart2CSV/wiki/Quick-Start)
 - [CLI Reference](https://github.com/kiku-jw/Chart2CSV/wiki/CLI-Reference)
+- [How It Works](https://github.com/kiku-jw/Chart2CSV/wiki/How-It-Works)
 - [FAQ](https://github.com/kiku-jw/Chart2CSV/wiki/FAQ)
-- [Troubleshooting](https://github.com/kiku-jw/Chart2CSV/wiki/Troubleshooting)
 
-## How It Works
+---
+
+## 🛠️ Installation
 
-1. Detects the chart area
-2. Finds the X and Y axes
-3. Reads the axis labels with OCR
-4. Extracts data points
-5. Outputs CSV
+```bash
+pip install chart2csv
+```
 
-## Contributing
+For offline OCR:
+```bash
+# macOS
+brew install tesseract
 
-Issues and pull requests welcome. See [GitHub Issues](https://github.com/kiku-jw/Chart2CSV/issues).
+# Ubuntu
+apt-get install tesseract-ocr
+```
 
-## License
+---
+
+## 📄 License
 
 MIT License. Free for personal and commercial use.
 
 ---
 
-**Keywords:** chart digitizer, extract data from graph, plot to csv, graph data extraction, chart image to data, webplotdigitizer alternative, digitize chart, extract values from chart image, chart ocr, graph to excel
+<div align="center">
+
+**[⬆ Back to Top](#chart2csv)**
+
+Made with ❤️ by [kiku-jw](https://github.com/kiku-jw)
+
+</div>