Updated README

README.md

@@ -1,5 +1,31 @@
 # TrackMap
 
-A web-based tool for me to analyze my daily cycling tracks.
+A web-based tool for analyzing daily walking/cycling tracks with interactive map visualization and detailed statistics.
 
-Can upload tracks as GPX files and visualize them to see daily progress.
+![TrackMap Screenshot](docs/screenshots/browser-screenshot.png)
+
+## Features
+
+- **GPX File Upload**: Import cycling tracks from GPS devices and apps
+- **Interactive Map**: View all tracks overlaid on an OpenStreetMap with color-coded routes
+- **Track Selection**: Click tracks in sidebar to highlight and focus on individual rides
+- **Detailed Statistics**: Distance, duration, average speed, elevation gain for each track
+- **Automatic Popups**: View track stats by clicking tracks on map
+- **Smart Zoom**: Automatic focusing on selected tracks with popup-aware positioning
+- **Responsive Design**: Clean interface that works on desktop and mobile
+
+## Usage
+
+1. **Upload GPX Files**: Click "Upload GPX Files" button in the sidebar
+2. **Browse Tracks**: Scroll through the track list showing dates and basic stats
+3. **Select Tracks**: Click any track to highlight it on the map and view detailed statistics
+4. **Explore Map**: Use map controls to zoom and pan around your routes
+5. **View Statistics**: See individual track details or total summary at bottom
+
+## Technical Details
+
+- **Client-Side Only**: All processing happens in your browser
+- **Vue 3**: Modern reactive JavaScript framework
+- **Leaflet**: Interactive maps with OpenStreetMap tiles
+- **Tailwind CSS**: Clean, responsive styling
+- **GPX Parsing**: Automatic extraction of coordinates, timestamps, and elevation data