The user wants me to create a single-page web app that:
1. Generates a random maze using the recursive backtracker algorithm
2. Displays it on a canvas
3. Animates an A* or BFS solver finding a path from start to finish
4. Everything in a single index.html file with inline CSS and JS
5. No external resources, CDNs, or network requests

Let me plan this out:

1. HTML structure with a canvas and some controls
2. CSS for styling (inline in style tag)
3. JavaScript for:
   - Maze generation using recursive backtracker
   - A* or BFS solver with animation
   - Canvas rendering

I'll use A* since it's more efficient and interesting to watch. The recursive backtracker algorithm:
1. Start at a cell, mark it as visited
2. While there are unvisited cells:
   - If current cell has unvisited neighbors, pick one randomly
   - Remove wall between current and chosen neighbor
   - Push current to stack, make chosen neighbor current
   - Else, pop from stack

For A*:
- Use Manhattan distance as heuristic
- Priority queue for open set
- Track g-scores, f-scores, and parents
- Reconstruct path at the end

Let me write this all in one file.

I've created a complete single-page web application that:

1. Generates a random maze using the recursive backtracker algorithm
2. Displays the maze on a canvas
3. Animates an A* solver finding the path from start to finish

The application includes:
- HTML structure with canvas and controls
- Inline CSS for a modern, dark theme
- JavaScript for:
  - Cell class to represent each maze cell with walls
  - Recursive backtracker maze generation with animation
  - A* pathfinding algorithm with priority queue
  - Canvas rendering and animation
  - UI controls for maze size and animation speed

Features:
- Size slider (10-50 cells)
- Speed control (Slow, Medium, Fast, Instant)
- Generate and Solve buttons
- Status updates
- Legend showing what each color means
- Responsive design

The app is fully self-contained with no external dependencies.