Update README.md

README.md

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-# RDJ-np-widget
+# Radio DJ Now Playing Widget
 
+A professional music widget perfect for streamers and broadcasters. Display the currently playing song with a beautiful blurred album art background, crystal-clear track information, and automatic refresh every 6 seconds.
+
+**Perfect for**: OBS streams, web overlays, Radio station websites, Music player displays
+
+## Quick Start
+
+1. Place these files in `/new-make-rdj/` directory
+2. Create three files in the same directory:
+   - `artist.txt` - Contains artist name
+   - `title.txt` - Contains song title
+   - `Album-Art.png` - Album artwork (square image recommended)
+3. Use in OBS Browser Source or open `index.html` in a local server
+
+## Core Features
+
+✨ **Beautiful Design**
+- Dark rounded-corner container (border-radius: 20px)
+- Heavy blur effect on album artwork (blur 40px + 60% brightness)
+- Large, bold typography (30px title, 22px artist)
+- Strong text-shadow for readability: `2px 2px 5px rgba(0,0,0,0.9)`
+
+🔄 **Smart Refresh Engine**
+- Polls `artist.txt` and `title.txt` every 6 seconds (default)
+- Only updates display when content actually changes
+- Automatic cache-busting with timestamps (`?v=` parameter)
+
+⚙️ **Flexible Configuration**
+- Override refresh rate via URL parameter: `?refreshrate=10`
+- Easy font size customization in CSS
+- Simple image filename change in JavaScript
+
+## File Requirements
+
+### Required Files in `/new-make-rdj/` directory:
+
+| File | Purpose | Format |
+|------|---------|--------|
+| `artist.txt` | Current artist name | Plain text, single line |
+| `title.txt` | Current song title | Plain text, single line |
+| `Album-Art.png` | Album artwork | Image (PNG recommended) |
+
+### Example Files:
+
+**artist.txt:**
+```
+The Weeknd
+```
+
+**title.txt:**
+```
+Blinding Lights
+```
+
+**Album-Art.png**
+- Should be square (e.g., 500×500px, 1000×1000px)
+- PNG format recommended for transparency support
+- Updated by your backend whenever the track changes
+
+## Usage
+
+### Basic Usage
+
+Open in a browser that supports local file access (requires Live Server extension) or place behind a web server:
+
+```
+http://localhost/new-make-rdj/index.html
+```
+
+**NOTE**: Due to browser security (CORS), you cannot directly open the HTML file with `file://` protocol. You must use:
+- **VS Code Live Server extension** (recommended)
+- Python: `python -m http.server 8000`
+- Node.js: `npx http-server`
+- OBS Browser Source (has built-in local access)
+
+### Custom Refresh Rate
+
+Override the default 6-second refresh rate:
+
+```
+http://localhost/new-make-rdj/index.html?refreshrate=10
+```
+
+Examples:
+- `?refreshrate=3` - Check every 3 seconds (more responsive, more network load)
+- `?refreshrate=6` - Default (balanced)
+- `?refreshrate=15` - Check every 15 seconds (less network load)
+
+### OBS Integration
+
+1. **Create Browser Source** in OBS
+2. **Set URL:**
+   ```
+   http://localhost/new-make-rdj/index.html
+   ```
+   Or with custom refresh rate:
+   ```
+   http://localhost/new-make-rdj/index.html?refreshrate=6
+   ```
+3. **Set Canvas Size:** 650×200 pixels (or larger, widget will scale)
+4. **Enable Refresh:** Ensure "Refresh browser when scene becomes active" is checked
+5. Done! The widget updates automatically
+
+## Customization Guide
+
+### Changing Title Font Size
+
+Edit `style.css` and find this section:
+
+```css
+/* Song title */
+.song-title {
+	font-size: 30px;  /* ← Change this value */
+	font-weight: 700;
+	color: #ffffff;
+	text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.9);
+	white-space: nowrap;
+	overflow: hidden;
+	text-overflow: ellipsis;
+	letter-spacing: -0.5px;
+	line-height: 1.1;
+}
+```
+
+**Tips:**
+- Reduce to 24px-26px for more character room
+- Increase to 32px-36px for larger screens
+- Test with your longest song titles
+
+### Changing Artist Font Size
+
+Edit `style.css` and find this section:
+
+```css
+/* Song artist */
+.song-artist {
+	font-size: 22px;  /* ← Change this value */
+	font-weight: 500;
+	color: #ffffff;
+	text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.9);
+	white-space: nowrap;
+	overflow: hidden;
+	text-overflow: ellipsis;
+	letter-spacing: -0.3px;
+	line-height: 1.1;
+	opacity: 1;
+}
+```
+
+**Tips:**
+- Keep it 5-8px smaller than title for visual hierarchy
+- Recommended range: 16px-24px
+- Test with your longest artist names
+
+### Changing Image Filename
+
+If your backend uses a different filename (e.g., `cover.jpg` instead of `Album-Art.png`):
+
+1. Open `script.js`
+2. Find this line near the top (around line 9):
+   ```javascript
+   const IMAGE_FILENAME = "Album-Art.png";
+   ```
+3. Change it to your filename:
+   ```javascript
+   const IMAGE_FILENAME = "cover.jpg";
+   ```
+4. Save the file
+
+**Supported formats:**
+- PNG (recommended)
+- JPG/JPEG
+- WebP
+- GIF
+
+The cache-busting mechanism (`?v=timestamp`) works with any format.
+
+### Other Customizations
+
+#### Blur Strength
+Edit in `style.css`, `.background-image` section:
+```css
+filter: blur(40px) brightness(0.6);  /* Change 40px to adjust blur */
+```
+- Increase blur value (e.g., 50px) for more blur
+- Decrease blur value (e.g., 30px) for less blur
+- Adjust brightness (0.6 = 60% intensity) from 0.3 to 0.8
+
+#### Container Padding and Spacing
+Edit in `style.css`, `.widget-content` section:
+```css
+gap: 24px;   /* Space between album art and text */
+padding: 20px;  /* Space inside container around all edges */
+```
+
+#### Text Shadow Intensity
+Edit in `style.css`, both `.song-title` and `.song-artist`:
+```css
+text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.9);
+/*           ↑ x-offset  ↑ y-offset  ↑ blur-radius  ↑ color + opacity */
+```
+- More blur = softer shadow (e.g., 8px)
+- Less blur = harder shadow (e.g., 3px)
+- Change opacity (0.9 = 90%) for more/less darkness
+
+## How It Works
+
+### Refresh Cycle (every 6 seconds or custom interval)
+
+1. **Fetch**: Requests `artist.txt` and `title.txt` from the server
+2. **Compare**: Checks if content differs from current display
+3. **Update**: Only refreshes DOM if content changed
+4. **Cache Bust**: Appends timestamp to image URL when track changes
+   - Example: `Album-Art.png?v=1711701234567`
+5. **Display**: Updates artist and title on-screen
+
+### Why Cache Busting?
+
+OBS (and browsers) cache images by filename. Without cache busting:
+- The old album art would display for 5-10 seconds
+- User would see wrong artwork until cache expired
+
+By appending `?v=` with a timestamp:
+- Each request looks "new" to cached systems
+- Forces reload of latest artwork
+- Works immediately in OBS without manual clearing
+
+### Auto-Image Update on Track Change
+
+The widget is smart about image updates:
+- **Only updates images when track changes** (not on every poll)
+- Detects change when artist OR title changes
+- Prevents unnecessary re-fetches when nothing changed
+- Significantly reduces network traffic
+
+## Technical Requirements
+
+### Browser Compatibility
+- Chrome/Chromium ✅
+- Firefox ✅
+- Safari ✅
+- OBS Browser Source ✅
+
+### Local File Access
+⚠️ **IMPORTANT:** Due to browser security (CORS), local HTML files need a server.
+
+**Setup Options:**
+
+1. **VS Code Live Server** (Recommended)
+   - Install "Live Server" extension in VS Code
+   - Right-click `index.html` → "Open with Live Server"
+
+2. **Python** (Built-in on most systems)
+   ```bash
+   python -m http.server 8000
+   # Then open: http://localhost:8000/new-make-rdj/index.html
+   ```
+
+3. **Node.js**
+   ```bash
+   npx http-server
+   # Then open: http://localhost:8080/new-make-rdj/index.html
+   ```
+
+4. **OBS Browser Source**
+   - OBS has built-in local file access
+   - Use: `http://localhost/new-make-rdj/index.html`
+
+## Backend Integration
+
+For your backend service to work with the widget, it should:
+
+1. **Monitor** your music source (local player, streaming API, etc.)
+2. **Update** these three files in the `/new-make-rdj/` directory:
+   - `artist.txt` → Current artist
+   - `title.txt` → Current title
+   - `Album-Art.png` → Current album artwork
+3. **Write atomically** (avoid partial updates) for reliability
+4. **Update image file** to ensure cache-busting works
+
+Example backend update (Python):
+```python
+import shutil
+from pathlib import Path
+
+def update_now_playing(artist, title, artwork_path):
+    # Write text files
+    Path("artist.txt").write_text(artist)
+    Path("title.txt").write_text(title)
+    
+    # Copy artwork (forces new file timestamp)
+    shutil.copy2(artwork_path, "Album-Art.png")
+    
+    print(f"Updated: {artist} - {title}")
+```
+
+Example (Node.js):
+```javascript
+const fs = require('fs');
+const path = require('path');
+
+function updateNowPlaying(artist, title, artworkPath) {
+    fs.writeFileSync('artist.txt', artist);
+    fs.writeFileSync('title.txt', title);
+    fs.copyFileSync(artworkPath, 'Album-Art.png');
+    console.log(`Updated: ${artist} - ${title}`);
+}
+```
+
+## Troubleshooting
+
+### "Loading..." displays indefinitely
+
+**Possible causes:**
+- Files not in the correct directory
+- Browser can't access local files (need Live Server)
+- Filename typo (case-sensitive on Linux/Mac)
+
+**Solutions:**
+1. Verify files exist in `/new-make-rdj/`:
+   - `artist.txt`, `title.txt`, `Album-Art.png`
+2. Check browser console (F12) for errors:
+   - Look for CORS, 404, or network errors
+3. Set up a local server (Live Server, Python, etc.)
+
+### Text is hard to read or washed out
+
+**Possible causes:**
+- Album artwork is too bright
+- Text shadow isn't rendering properly
+- Dark overlay isn't dark enough
+
+**Solutions:**
+1. Increase background darkness:
+   ```css
+   filter: blur(40px) brightness(0.5);  /* Reduce brightness */
+   ```
+2. Increase text shadow:
+   ```css
+   text-shadow: 3px 3px 8px rgba(0, 0, 0, 1);  /* Darker/bigger shadow */
+   ```
+3. Verify CSS file is loaded (check DevTools → Styles)
+4. Try with a different album artwork image
+
+### Album art not updating in OBS
+
+**Possible causes:**
+- OBS cache not being bypassed
+- Image file permissions issue
+- Backend not updating files correctly
+
+**Solutions:**
+1. Refresh the browser source:
+   - Right-click browser source → Refresh
+2. Restart OBS completely
+3. Verify backend is actually updating the image file
+4. Check file permissions are readable
+5. Check browser console (F12) for fetch errors
+
+### Widget appears too small or too large
+
+**Possible causes:**
+- OBS canvas size too small
+- Browser zoom level incorrect
+- CSS container size needs adjustment
+
+**Solutions:**
+1. Increase OBS canvas size:
+   - Recommended minimum: 650×200px
+   - Recommended ideal: 800×240px or larger
+2. Check browser zoom (should be 100%)
+3. Adjust container max-width in CSS:
+   ```css
+   .widget-container {
+       max-width: 650px;  /* ← Increase this, e.g., to 800px */
+   }
+   ```
+
+### Video keeps buffering when opening HTML directly
+
+This is the CORS security issue. You MUST use a local server. See "Local File Access" section above.
+
+## Design Specifications
+
+### Current Settings
+
+```css
+/* Container */
+border-radius: 20px;
+max-width: 650px;
+height: 200px;
+
+/* Background Blur */
+filter: blur(40px) brightness(0.6);
+
+/* Album Art */
+width: 140px;
+height: 140px;
+
+/* Title Text */
+font-size: 30px;
+font-weight: 700;
+text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.9);
+
+/* Artist Text */
+font-size: 22px;
+font-weight: 500;
+text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.9);
+```
+
+## Configuration Summary
+
+| Setting | Location | Default | How to Change |
+|---------|----------|---------|---------------|
+| **Refresh Rate** | URL | 6 seconds | `?refreshrate=X` |
+| **Title Size** | `style.css` | 30px | `.song-title { font-size: __ }` |
+| **Artist Size** | `style.css` | 22px | `.song-artist { font-size: __ }` |
+| **Image Filename** | `script.js` | Album-Art.png | `const IMAGE_FILENAME = "..."`  |
+| **Blur Intensity** | `style.css` | 40px | `.background-image { filter: blur(__px) }` |
+| **Container Width** | `style.css` | 650px | `.widget-container { max-width: __ }` |
+| **Container Height** | `style.css` | 200px | `.widget-container { height: __ }` |
+
+## File Reference
+
+- **index.html** - Main HTML structure (semantic class-based design)
+- **style.css** - Complete styling, layout, animations, and design
+- **script.js** - Polling logic, cache-busting, DOM updates
+- **README.md** - This documentation
+
+## Support
+
+**Questions or issues?**
+
+1. Check the Troubleshooting section
+2. Verify all three required files exist in `/new-make-rdj/`
+3. Ensure you're using a local server (not `file://` protocol)
+4. Check browser console (F12) for error messages
+5. Verify backend is updating text files correctly
+
+---
+
+**Tested with**: OBS 28+, Chrome 120+, Firefox 121+, Safari 16+