Breakout

Build a complete, playable Breakout game that runs from `index.html`. Canvas, 2D context, one
`<canvas>` element. You may split the JS into `game.js`.

## The game

- A play field of 960×600 CSS pixels, centred on the page.
- **8 columns × 5 rows of bricks** at the top, with a gap between them. Rows are different
  colours. Bricks in the top two rows take two hits (visibly damaged after the first); the rest
  take one.
- A paddle on the bottom edge, controlled by **both** the mouse (paddle follows the cursor's x)
  and the **left/right arrow keys**. It cannot leave the field.
- A ball that starts stuck to the paddle and launches on **Space** or a click. It bounces off
  the walls, the ceiling, the bricks and the paddle. **Where the ball hits the paddle changes
  the angle it leaves at** — the edges deflect more steeply than the centre.
- **3 lives.** Losing the ball off the bottom costs a life and re-sticks the ball to the paddle.
- **Score**: 10 points per brick hit, 50 for destroying one. Score and lives are visible during
  play.
- **Win** when every brick is gone, **lose** at zero lives. Both states show a clear message and
  offer a restart that fully resets the game — including the score, the lives and the bricks.

## Requirements

- The game loop uses `requestAnimationFrame` and is **frame-rate independent**: movement is
  scaled by elapsed time, so the ball travels at the same speed on a 60Hz and a 144Hz display.
- The ball must never tunnel through a brick, stick inside one, or escape the play field, even
  when it speeds up.
- Speed increases gradually as bricks are destroyed, with a cap.
- Pause on **P** or when the window loses focus.
- Add some juice of your choosing — a hit flash, particles, a screen shake, a trail, a sound
  synthesised with the WebAudio API. Enough that hitting a brick feels good. Do not overdo it.
- Draw all the graphics with the canvas API. You have no network and no image files.
- Show the controls on the page, outside the canvas.

It must be genuinely playable and completable. Test your own logic by reading it back carefully
before you finish.