Breakout

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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover">
<title>Breakout — sloprun.dev</title>
<style>
/* ── sloprun design tokens (verbatim from demos/tokens.css) ───────────────── */
:root {
  --bg: #F6F6F3;          /* neutral paper, not cream */
  --surface: #FFFFFF;
  --ink: #1A1D21;
  --muted: #5A6068;
  --line: #E3E2DC;
  --accent: #C05600;      /* phosphor amber, darkened for light bg */
  --accent-soft: #FFF3E6;
  --run: #1A7F37;         /* earned green */
  --run-soft: #E7F4EA;
  --danger: #C93C37;
  --radius: 10px;
  --font-sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161A; --surface: #1C1F26; --ink: #E8E6E1; --muted: #9AA0A8;
    --line: #2A2E36; --accent: #FFB454; --accent-soft: #2A2118;
    --run: #3FB950; --run-soft: #16281B; --danger: #F47067;
  }
}
:root[data-theme="dark"] {
  --bg: #14161A; --surface: #1C1F26; --ink: #E8E6E1; --muted: #9AA0A8;
  --line: #2A2E36; --accent: #FFB454; --accent-soft: #2A2118;
  --run: #3FB950; --run-soft: #16281B; --danger: #F47067;
}
body { background: var(--bg); color: var(--ink); font-family: var(--font-sans); }
/* ── end tokens ───────────────────────────────────────────────────────────── */

/* demo-local additions (scrims need alpha; tokens are opaque hex) */
:root { --scrim: rgba(246,246,243,.90); --shadow: 0 1px 2px rgba(26,29,33,.05); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --scrim: rgba(20,22,26,.90); --shadow: 0 1px 2px rgba(0,0,0,.35); }
}
:root[data-theme="dark"] { --scrim: rgba(20,22,26,.90); --shadow: 0 1px 2px rgba(0,0,0,.35); }

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body { min-height: 100%; overflow-x: hidden; }

.wrap {
  max-width: 1080px; margin: 0 auto;
  padding: 22px 16px 26px;
  display: flex; flex-direction: column; gap: 16px;
}

h1 { margin: 0 0 6px; font-size: clamp(21px, 3.6vw, 29px); letter-spacing: -.021em; line-height: 1.15; }
.lede { margin: 0; max-width: 68ch; color: var(--muted); font-size: 14.5px; line-height: 1.55; }
.lede b { color: var(--ink); font-weight: 600; }
.lede kbd {
  font-family: var(--font-mono); font-size: .84em; color: var(--accent);
  background: var(--accent-soft); border-radius: 4px; padding: 1px 5px; border: 0;
}

.stage { display: grid; grid-template-columns: minmax(0,1fr) 274px; gap: 16px; align-items: start; }
@media (max-width: 880px) { .stage { grid-template-columns: minmax(0,1fr); } }

/* the field — sized from its own width, never stretched to the panel's height,
   and capped so the paddle never sits below the fold */
.field {
  position: relative; overflow: hidden;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  aspect-ratio: 4 / 3;
  max-height: calc(100svh - 180px);
  min-height: 320px;
}
@media (max-width: 560px) { .field { aspect-ratio: 1 / 1; } }
canvas { display: block; width: 100%; height: 100%; touch-action: none; cursor: default; }
.field.aiming canvas { cursor: none; }
canvas:focus { outline: none; }
canvas:focus-visible { outline: 2px solid var(--accent); outline-offset: -3px; }

/* chip over the field */
.hint {
  position: absolute; left: 10px; bottom: 44px; pointer-events: none;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .01em;
  color: var(--muted); background: var(--scrim);
  border: 1px solid var(--line); border-radius: 999px; padding: 5px 10px;
  transition: opacity .3s ease; max-width: calc(100% - 20px);
}
.hint[hidden] { display: none; }
@media (max-width: 480px) { .hint { font-size: 10px; padding: 4px 8px; left: 8px; bottom: 34px; } }

/* floating score pops */
.pops { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }

/* overlay */
.overlay {
  position: absolute; inset: 0; display: grid; place-items: center;
  background: var(--scrim); padding: 16px; text-align: center;
}
.overlay[hidden] { display: none; }
.overlay .box { display: flex; flex-direction: column; align-items: center; gap: 10px; max-width: 36ch; }
.overlay h2 { margin: 0; font-size: clamp(19px, 4.4vw, 25px); letter-spacing: -.02em; line-height: 1.1; }
.overlay p { margin: 0; font-size: 13px; line-height: 1.5; color: var(--muted); }
.overlay .keyhint { font-family: var(--font-mono); font-size: 11px; letter-spacing: .03em; }
.overlay .final { font-family: var(--font-mono); font-size: 13px; color: var(--ink); font-variant-numeric: tabular-nums; }
.tag {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .12em; text-transform: uppercase;
  border: 1px solid var(--line); border-radius: 999px; padding: 3px 9px; color: var(--muted); background: var(--bg);
}
.tag.ok { color: var(--run); background: var(--run-soft); border-color: transparent; }
.tag.bad { color: var(--danger); background: var(--surface); border-color: var(--danger); }

/* panel */
.panel { display: flex; flex-direction: column; gap: 12px; }
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 12px 13px; box-shadow: var(--shadow);
}
.card h2 {
  margin: 0 0 10px; font-family: var(--font-mono); font-size: 10.5px;
  letter-spacing: .1em; text-transform: uppercase; color: var(--muted); font-weight: 600;
}

.stats { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 11px 8px; }
@media (max-width: 880px) { .stats { grid-template-columns: repeat(3, minmax(0,1fr)); } }
.stat { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.stat .v {
  font-family: var(--font-mono); font-size: 19px; line-height: 1.05;
  font-variant-numeric: tabular-nums; letter-spacing: -.02em;
  white-space: nowrap; overflow: hidden; text-overflow: clip;
}
.stat .v.sm { font-size: 15px; }
.stat .k {
  font-family: var(--font-mono); font-size: 9.5px; letter-spacing: .09em;
  text-transform: uppercase; color: var(--muted);
}
.stat .v.good { color: var(--run); }
.stat .v.hot { color: var(--accent); }
.stat .v .off { color: var(--muted); opacity: .38; }

.bar {
  height: 6px; border-radius: 3px; background: var(--line); margin-top: 12px; overflow: hidden;
}
.bar > i { display: block; height: 100%; width: 0%; background: var(--accent); border-radius: 3px; transition: width .18s ease; }
.bar.done > i { background: var(--run); }
.barrow { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-top: 9px; }
.barrow .lbl { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
.barrow .num { font-family: var(--font-mono); font-size: 11px; color: var(--muted); font-variant-numeric: tabular-nums; }

.pill {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 12px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .04em;
  padding: 3px 9px 3px 7px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted); background: var(--bg);
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); flex: none; }
.pill.ok { color: var(--run); background: var(--run-soft); border-color: transparent; }
.pill.ok .dot { background: var(--run); }
.pill.bad { color: var(--danger); border-color: var(--danger); background: var(--surface); }
.pill.bad .dot { background: var(--danger); }
.pill.live { color: var(--accent); background: var(--accent-soft); border-color: transparent; }
.pill.live .dot { background: var(--accent); }

button {
  font: inherit; font-size: 13px; font-family: var(--font-sans);
  color: var(--ink); background: var(--surface);
  border: 1px solid var(--line); border-radius: 8px;
  padding: 7px 11px; cursor: pointer; line-height: 1.2;
  transition: border-color .12s ease, color .12s ease, background .12s ease;
}
button:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button:disabled { opacity: .42; cursor: not-allowed; }
button.primary { background: var(--accent); color: var(--surface); border-color: var(--accent); font-weight: 600; }
button.primary:hover:not(:disabled) { color: var(--surface); filter: brightness(1.07); }
button.big { font-size: 14px; padding: 9px 18px; }

.row { display: flex; flex-wrap: wrap; gap: 7px; }
.row > button { flex: 1 1 auto; }
.modes { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 7px; }
.modes button { padding: 7px 4px; font-size: 12.5px; }
.modes button[aria-pressed="true"] {
  background: var(--accent-soft); color: var(--accent); border-color: var(--accent); font-weight: 600;
}

.switch { display: flex; align-items: center; gap: 9px; cursor: pointer; font-size: 13px; margin-top: 11px; }
.switch input { position: absolute; opacity: 0; width: 0; height: 0; }
.track {
  width: 34px; height: 19px; border-radius: 999px; background: var(--line);
  border: 1px solid var(--line); position: relative; flex: none; transition: background .15s ease;
}
.track::after {
  content: ""; position: absolute; top: 1.5px; left: 2px; width: 14px; height: 14px;
  border-radius: 50%; background: var(--surface); transition: transform .15s ease;
  box-shadow: 0 1px 2px rgba(0,0,0,.25);
}
.switch input:checked + .track { background: var(--accent); border-color: var(--accent); }
.switch input:checked + .track::after { transform: translateX(15px); }
.switch input:focus-visible + .track { outline: 2px solid var(--accent); outline-offset: 2px; }

.cap { margin: 9px 0 0; font-size: 11.5px; line-height: 1.45; color: var(--muted); }
.cap b { color: var(--ink); font-weight: 600; }

.keys { display: flex; flex-direction: column; gap: 6px; margin: 0; }
.keys div { display: flex; align-items: baseline; gap: 9px; font-size: 12.5px; color: var(--muted); }
.keys kbd {
  font-family: var(--font-mono); font-size: 10.5px; color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-bottom-width: 2px;
  border-radius: 5px; padding: 2px 6px; min-width: 4.5em; text-align: center; flex: none;
}

.brickkey { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 7px; }
.brickkey div { display: flex; flex-direction: column; gap: 4px; align-items: center; }
.brickkey .sw { width: 100%; height: 13px; border-radius: 3px; border: 1px solid var(--line); }
.brickkey .n { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: .06em; color: var(--muted); text-transform: uppercase; }

footer {
  font-family: var(--font-mono); font-size: 11px; color: var(--muted);
  letter-spacing: .05em; padding-top: 2px;
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: .001ms !important; animation-duration: .001ms !important; }
}
</style>
</head>
<body>
<div class="wrap">

  <header>
    <h1>Breakout</h1>
    <p class="lede">
      A brick wall, one ball, and a paddle that turns the ball wherever you hit it.
      The boldest bricks take up to <b>four</b> hits, the faintest take <b>one</b>. Clear the wall and
      the next one arrives faster. <span id="ledeStart">It is already playing itself — <span id="ledeTake"><b>move the mouse</b>
      or press <kbd>&larr;</kbd> <kbd>&rarr;</kbd></span> to take over.</span>
    </p>
  </header>

  <main class="stage">

    <div class="field" id="field">
      <canvas id="c" tabindex="0" role="application" aria-label="Breakout play field. Left and right arrow keys move the paddle, space launches the ball and pauses.">
        A canvas game: a paddle bounces a ball into a wall of bricks. Your browser does not support canvas.
      </canvas>
      <div class="pops" id="pops" aria-hidden="true"></div>
      <div class="hint" id="hint">auto-play &middot; move the mouse to take over</div>
      <div class="overlay" id="overlay" hidden>
        <div class="box">
          <span class="tag" id="ovTag">paused</span>
          <h2 id="ovTitle">Paused</h2>
          <p id="ovNote">The ball is holding still.</p>
          <p class="final" id="ovFinal" hidden></p>
          <button class="primary big" id="ovBtn" type="button">Resume</button>
          <p class="keyhint" id="ovKey">space to resume</p>
        </div>
      </div>
    </div>

    <div class="panel">

      <section class="card" aria-label="Game readout">
        <h2>Readout</h2>
        <div class="stats">
          <div class="stat"><span class="v" id="sScore">0</span><span class="k">score</span></div>
          <div class="stat"><span class="v" id="sBest">0</span><span class="k">best</span></div>
          <div class="stat"><span class="v sm" id="sLives" aria-hidden="true">&#9679;&#9679;&#9679;</span><span class="sr-only" id="sLivesSR">3 balls left</span><span class="k" aria-hidden="true">lives</span></div>
          <div class="stat"><span class="v" id="sLevel">1</span><span class="k">level</span></div>
          <div class="stat"><span class="v" id="sCombo">&times;1</span><span class="k">combo</span></div>
          <div class="stat"><span class="v" id="sSpeed">&times;1.00</span><span class="k">ball speed</span></div>
        </div>
        <div class="barrow">
          <span class="lbl">wall cleared</span><span class="num" id="sWall">0 / 44</span>
        </div>
        <div class="bar" id="bar"><i id="barFill"></i></div>
        <span class="pill live" id="pill"><span class="dot"></span><span id="pillText">auto-play</span></span>
      </section>

      <section class="card" aria-label="Controls">
        <h2>Controls</h2>
        <div class="row" style="margin-bottom:7px">
          <button type="button" class="primary" id="mainBtn">Take over</button>
          <button type="button" id="newBtn">New game</button>
        </div>
        <label class="switch" for="snd">
          <input type="checkbox" id="snd">
          <span class="track" aria-hidden="true"></span>
          <span>Blips</span>
        </label>
      </section>

      <section class="card" aria-label="Difficulty">
        <h2>Difficulty</h2>
        <div class="modes" id="modes" role="group" aria-label="Difficulty">
          <button type="button" data-m="0" aria-pressed="false">Easy</button>
          <button type="button" data-m="1" aria-pressed="true">Normal</button>
          <button type="button" data-m="2" aria-pressed="false">Sharp</button>
        </div>
        <p class="cap" id="modeCap">The standard wall: 3 lives and a ball that ramps up as the level empties.</p>
      </section>

      <section class="card" aria-label="Brick strength key">
        <h2>Bricks</h2>
        <div class="brickkey" aria-hidden="true">
          <div><span class="sw" id="k1"></span><span class="n">1 hit</span></div>
          <div><span class="sw" id="k2"></span><span class="n">2 hit</span></div>
          <div><span class="sw" id="k3"></span><span class="n">3 hit</span></div>
          <div><span class="sw" id="k4"></span><span class="n">4 hit</span></div>
        </div>
        <p class="cap">A brick fades toward the field each time you hit it, so you can always read how close it is to going. Break bricks without touching the paddle to build the <b>combo</b> — it multiplies every point.</p>
      </section>

      <section class="card" aria-label="Keys">
        <h2>Keys</h2>
        <div class="keys">
          <div><kbd>&larr; &rarr;</kbd><span>move the paddle</span></div>
          <div><kbd>space</kbd><span>launch &middot; pause &middot; resume</span></div>
          <div><kbd>P</kbd><span>pause</span></div>
          <div><kbd>R</kbd><span>new game</span></div>
        </div>
      </section>

    </div>
  </main>

  <footer>demo &middot; sloprun.dev</footer>
</div>

<div class="sr-only" role="status" aria-live="polite" id="live"></div>

<script>
(function () {
  "use strict";

  /* ── theme plumbing ─────────────────────────────────────────────────────── */
  var root = document.documentElement;
  var mqDark = window.matchMedia ? matchMedia("(prefers-color-scheme: dark)") : null;
  var mqRM   = window.matchMedia ? matchMedia("(prefers-reduced-motion: reduce)") : null;
  var reduced = !!(mqRM && mqRM.matches);

  window.addEventListener("message", function (e) {
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      readTheme(); dirty = true;
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  function onScheme() { readTheme(); dirty = true; }
  // the platform may also flip data-theme on <html> directly, with no message —
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  /* ── colours from tokens ────────────────────────────────────────────────── */
  var COL = {
    bg: [246,246,243], surface: [255,255,255], ink: [26,29,33], muted: [90,96,104],
    line: [227,226,220], accent: [192,86,0], run: [26,127,55], danger: [201,60,55]
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  function hexToRgb(h) {
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  function rgba(c, a) { return "rgba(" + c[0] + "," + c[1] + "," + c[2] + "," + a + ")"; }
  function rgb(c) { return "rgb(" + c[0] + "," + c[1] + "," + c[2] + ")"; }
  function mix(a, b, t) {
    return [Math.round(a[0]+(b[0]-a[0])*t), Math.round(a[1]+(b[1]-a[1])*t), Math.round(a[2]+(b[2]-a[2])*t)];
  }
  var BRICK = [null, [0,0,0], [0,0,0], [0,0,0], [0,0,0]];
  function readTheme() {
    COL.bg      = tok("--bg", COL.bg);
    COL.surface = tok("--surface", COL.surface);
    COL.ink     = tok("--ink", COL.ink);
    COL.muted   = tok("--muted", COL.muted);
    COL.line    = tok("--line", COL.line);
    COL.accent  = tok("--accent", COL.accent);
    COL.run     = tok("--run", COL.run);
    COL.danger  = tok("--danger", COL.danger);
    BRICK[1] = mix(COL.surface, COL.muted, 0.46);
    BRICK[2] = mix(COL.surface, COL.muted, 0.82);
    BRICK[3] = COL.accent.slice();
    BRICK[4] = mix(COL.surface, COL.ink, 0.86);
    for (var i = 1; i <= 4; i++) {
      var el = document.getElementById("k" + i);
      if (el) el.style.background = rgb(BRICK[i]);
    }
  }

  /* ── dom ────────────────────────────────────────────────────────────────── */
  var field   = document.getElementById("field");
  var canvas  = document.getElementById("c");
  var ctx     = null;
  try { ctx = canvas.getContext("2d"); } catch (e) { ctx = null; }
  var popsEl  = document.getElementById("pops");
  var hint    = document.getElementById("hint");
  var overlay = document.getElementById("overlay");
  var ovTag   = document.getElementById("ovTag");
  var ovTitle = document.getElementById("ovTitle");
  var ovNote  = document.getElementById("ovNote");
  var ovFinal = document.getElementById("ovFinal");
  var ovBtn   = document.getElementById("ovBtn");
  var ovKey   = document.getElementById("ovKey");
  var sScore  = document.getElementById("sScore");
  var sBest   = document.getElementById("sBest");
  var sLives  = document.getElementById("sLives");
  var sLivesSR= document.getElementById("sLivesSR");
  var sLevel  = document.getElementById("sLevel");
  var sCombo  = document.getElementById("sCombo");
  var sSpeed  = document.getElementById("sSpeed");
  var sWall   = document.getElementById("sWall");
  var bar     = document.getElementById("bar");
  var barFill = document.getElementById("barFill");
  var pill    = document.getElementById("pill");
  var pillText= document.getElementById("pillText");
  var mainBtn = document.getElementById("mainBtn");
  var newBtn  = document.getElementById("newBtn");
  var modes   = document.getElementById("modes");
  var modeCap = document.getElementById("modeCap");
  var sndBox  = document.getElementById("snd");
  var live    = document.getElementById("live");

  // no 2d context (canvas disabled or blocked) — say so plainly instead of
  // throwing on every frame and leaving a blank rectangle on the page
  if (!ctx) {
    mainBtn.disabled = true; newBtn.disabled = true; sndBox.disabled = true;
    var mbtns = modes.querySelectorAll("button[data-m]");
    for (var mi = 0; mi < mbtns.length; mi++) mbtns[mi].disabled = true;
    hint.hidden = true;
    ovTag.className = "tag bad"; ovTag.textContent = "no canvas";
    ovTitle.textContent = "This browser cannot draw the field";
    ovNote.textContent = "Breakout needs a 2D canvas, and this browser did not give one. Everything else on the page is inert.";
    ovFinal.hidden = true; ovBtn.hidden = true; ovKey.hidden = true;
    overlay.hidden = false;
    live.textContent = "Canvas is unavailable, so the game cannot run.";
    return;
  }

  /* ── virtual geometry (width is always 1000 units) ──────────────────────── */
  var VW = 1000, VH = 750, SCALE = 1, DPR = 1;
  function brickH() { return Math.max(24, Math.min(64, VH * 0.055)); }
  function brickTop() { return Math.max(48, VH * 0.22); }
  var PAD_X = 44;
  function brickW() { return (VW - PAD_X * 2) / grid.cols; }
  function paddleY() { return VH - Math.max(38, VH * 0.055); }

  function resize() {
    // clientWidth/Height is the box the canvas actually fills (the border is not in it),
    // so the backing store lands 1:1 on device pixels — no resample, no soft edges.
    var w = Math.max(160, field.clientWidth);
    var h = Math.max(160, field.clientHeight);
    DPR = Math.min(2, window.devicePixelRatio || 1);
    if (canvas.width !== Math.round(w * DPR) || canvas.height !== Math.round(h * DPR)) {
      canvas.width  = Math.round(w * DPR);
      canvas.height = Math.round(h * DPR);
    }
    canvas.style.width  = w + "px";
    canvas.style.height = h + "px";
    SCALE = w / VW;
    VH = Math.round(VW * h / w);
    paddle.y = paddleY();
    // a court that just got shorter must not swallow a ball that is still in play
    if (ball.y > VH - ball.r) ball.y = VH - ball.r;
    dirty = true;
  }

  /* ── model ──────────────────────────────────────────────────────────────── */
  var MODES = [
    { name: "Easy",   pw: 200, spd: 430, lives: 4, cap: "Wide paddle, calm ball, 4 lives. Picking a difficulty starts a fresh game." },
    { name: "Normal", pw: 152, spd: 520, lives: 3, cap: "The standard wall: 3 lives and a ball that ramps up as the level empties." },
    { name: "Sharp",  pw: 108, spd: 610, lives: 3, cap: "Narrow paddle, fast ball, 3 lives. Every wall gets an extra row." }
  ];
  var mode = 1;

  var grid = { cols: 11, rows: 5, hp: [], hp0: [], left: 0 };
  var paddle = { x: VW / 2, w: 152, h: 15, y: 700, vx: 0 };
  var ball = { x: VW / 2, y: 600, vx: 0, vy: 0, r: 10 };
  var game = {
    state: "attract",   // attract | ready | playing | paused | clear | over
    score: 0, best: 0, lives: 3, level: 1,
    combo: 0, mult: 1, breaks: 0, hadBest: false,
    speed: 520, base: 520, total: 0, left: 0,
    newBest: false
  };
  var fx = [], trail = [], shake = 0, dirty = true;
  var lostFlash = 0;

  /* ── level building ─────────────────────────────────────────────────────── */
  function levelPlan(n) {
    var cols = 11;
    var rows = Math.min(7, 4 + Math.floor((n - 1) / 2) + (mode === 2 ? 1 : 0));
    var maxHp = Math.min(4, 3 + Math.floor((n - 1) / 2));
    var pat = (n - 1) % 5;
    var mid = (cols - 1) / 2;
    var hp = [], hp0 = [], count = 0;
    for (var r = 0; r < rows; r++) {
      for (var c = 0; c < cols; c++) {
        var on = true;
        if (pat === 1) on = ((r + c) % 2 === 0) || r === 0;
        else if (pat === 2) on = (c >= r && c <= cols - 1 - r);
        else if (pat === 3) on = (c % 3 !== 1) || r === rows - 1;
        else if (pat === 4) on = (Math.abs(c - mid) + Math.abs(r - (rows - 1) / 2) <= mid);
        var v = 0;
        if (on) {
          v = rows > 1 ? 1 + Math.round((rows - 1 - r) / (rows - 1) * (maxHp - 1)) : maxHp;
          count++;
        }
        hp.push(v); hp0.push(v);
      }
    }
    if (count < 10) {   // safety: never ship an empty wall
      hp = []; hp0 = []; count = 0;
      for (var i = 0; i < rows * cols; i++) {
        var rr = Math.floor(i / cols);
        var vv = rows > 1 ? 1 + Math.round((rows - 1 - rr) / (rows - 1) * (maxHp - 1)) : maxHp;
        hp.push(vv); hp0.push(vv); count++;
      }
    }
    grid.cols = cols; grid.rows = rows; grid.hp = hp; grid.hp0 = hp0;
    game.total = count; game.left = count;
  }

  /* ── sound (synthesised, no assets, no network) ─────────────────────────── */
  var soundOn = false, actx = null;
  function beep(freq, dur, type, vol) {
    if (!soundOn) return;
    try {
      var AC = window.AudioContext || window.webkitAudioContext;
      if (!AC) return;
      if (!actx) actx = new AC();
      if (actx.state === "suspended" && actx.resume) actx.resume();
      var o = actx.createOscillator(), g = actx.createGain();
      o.type = type || "square";
      o.frequency.value = freq;
      o.connect(g); g.connect(actx.destination);
      var t = actx.currentTime, d = dur || 0.06;
      g.gain.setValueAtTime(0.0001, t);
      g.gain.exponentialRampToValueAtTime(vol || 0.05, t + 0.006);
      g.gain.exponentialRampToValueAtTime(0.0001, t + d);
      o.start(t); o.stop(t + d + 0.02);
    } catch (e) { /* audio unavailable — game plays on */ }
  }

  /* ── ui ─────────────────────────────────────────────────────────────────── */
  function say(msg) { live.textContent = msg; }

  function setPill(cls, text) {
    pill.className = "pill" + (cls ? " " + cls : "");
    pillText.textContent = text;
  }

  function fmt(n) { return String(n).replace(/\B(?=(\d{3})+(?!\d))/g, ","); }

  function renderHud() {
    sScore.textContent = fmt(game.score);
    sBest.textContent = fmt(game.best);
    sBest.className = "v" + (game.newBest ? " good" : "");
    var dots = "";
    for (var i = 0; i < Math.max(game.lives, 0); i++) dots += "●";
    var off = "";
    for (var j = Math.max(game.lives, 0); j < MODES[mode].lives; j++) off += "○";
    sLives.innerHTML = dots + (off ? '<span class="off">' + off + "</span>" : "");
    sLivesSR.textContent = Math.max(game.lives, 0) + (game.lives === 1 ? " ball left" : " balls left");
    sLevel.textContent = game.level;
    sCombo.textContent = "×" + game.mult;
    sCombo.className = "v" + (game.mult > 1 ? " hot" : "");
    sSpeed.textContent = "×" + (game.speed / MODES[mode].spd).toFixed(2);
    sSpeed.className = "v" + (game.speed / MODES[mode].spd >= 1.3 ? " hot" : "");
    var done = game.total - game.left;
    sWall.textContent = done + " / " + game.total;
    var pct = game.total ? (done / game.total) * 100 : 0;
    barFill.style.width = pct.toFixed(1) + "%";
    if (game.left === 0 && game.total > 0) bar.classList.add("done"); else bar.classList.remove("done");

    var s = game.state;
    mainBtn.textContent =
      s === "attract" ? "Take over" :
      s === "ready"   ? "Launch ball" :
      s === "playing" ? "Pause" :
      s === "paused"  ? (game.score === 0 && game.level === 1 && ball.vx === 0 && ball.vy === 0 ? "Start playing" : "Resume") :
      s === "clear"   ? "Next level" : "Play again";
    if (s === "attract") setPill("live", "auto-play");
    else if (s === "playing") setPill("live", "playing");
    else if (s === "ready") setPill("", "ready · launch");
    else if (s === "paused") setPill("", "paused");
    else if (s === "clear") setPill("ok", "level " + game.level + " cleared");
    else setPill("bad", "game over");
    field.classList.toggle("aiming", usingPointer && (s === "playing" || s === "ready"));
  }

  var focusOverlay = false;
  function showOverlay(tagCls, tagText, title, note, btn, keyhint, finalText) {
    ovTag.className = "tag" + (tagCls ? " " + tagCls : "");
    ovTag.textContent = tagText;
    ovTitle.textContent = title;
    ovNote.textContent = note;
    ovBtn.textContent = btn;
    ovKey.textContent = keyhint;
    if (finalText) { ovFinal.textContent = finalText; ovFinal.hidden = false; }
    else ovFinal.hidden = true;
    overlay.hidden = false;
    if (focusOverlay) { try { ovBtn.focus(); } catch (e) {} }
  }
  function hideOverlay() {
    var wasFocused = document.activeElement === ovBtn;
    overlay.hidden = true;
    if (wasFocused) { try { canvas.focus({ preventScroll: true }); } catch (e) {} }
  }

  var touchy = !!(window.matchMedia && matchMedia("(hover: none)").matches);
  var ATTRACT_HINT = touchy ? "auto-play · tap to take over" : "auto-play · move the mouse to take over";
  if (touchy) {
    var ledeTake = document.getElementById("ledeTake");
    if (ledeTake) ledeTake.innerHTML = "<b>tap or drag</b> on the field";
  }
  var LAUNCH_HINT  = touchy ? "tap to launch" : "press space to launch";

  function setHint(text) {
    if (!text) { hint.hidden = true; return; }
    hint.hidden = false; hint.textContent = text;
  }

  /* ── score pops (html, so they read crisply at any size) ────────────────── */
  function pop(x, y, text, good) {
    if (reduced) return;
    var el = document.createElement("div");
    el.textContent = text;
    el.style.cssText =
      "position:absolute;left:" + (x / VW * 100).toFixed(2) + "%;top:" + (y / VH * 100).toFixed(2) + "%;" +
      "transform:translate(-50%,-50%);font-family:var(--font-mono);font-size:12px;font-weight:600;" +
      "color:" + (good ? "var(--run)" : "var(--accent)") + ";opacity:1;transition:transform .55s ease-out,opacity .55s ease-out;" +
      "pointer-events:none;white-space:nowrap;";
    popsEl.appendChild(el);
    requestAnimationFrame(function () {
      el.style.transform = "translate(-50%,-160%)";
      el.style.opacity = "0";
    });
    setTimeout(function () { if (el.parentNode) el.parentNode.removeChild(el); }, 620);
  }

  /* ── game flow ──────────────────────────────────────────────────────────── */
  function resetBall(onPaddle) {
    trail.length = 0;
    if (onPaddle) {
      ball.x = paddle.x;
      ball.y = paddle.y - paddle.h / 2 - ball.r - 1;
      ball.vx = 0; ball.vy = 0;
    }
  }
  function launch() {
    // measured off vertical so there is no dead zone: a launch is never so close
    // to straight up that it just falls back down the same line
    var dir = Math.random() < 0.5 ? -1 : 1;
    var a = (0.20 + Math.random() * 0.28) * (Math.PI / 2);   // 18°–43° off vertical
    ball.vx = Math.sin(a) * game.speed * dir;
    ball.vy = -Math.abs(Math.cos(a) * game.speed);
    beep(520, 0.05, "square", 0.045);
  }
  function levelSpeed() {
    return MODES[mode].spd * (1 + 0.09 * (game.level - 1));
  }
  // the ceiling has to sit above this level's own starting pace, or a late level
  // would clamp the ball *slower* than the speed it launched at
  function speedCap() {
    return Math.max(MODES[mode].spd * 2.0, game.base * 1.35);
  }

  function startAttract() {
    game.state = "attract";
    game.level = 1; game.score = 0; game.combo = 0; game.mult = 1; game.breaks = 0;
    game.lives = MODES[mode].lives;
    game.base = levelSpeed(); game.speed = game.base;
    levelPlan(1);
    paddle.w = MODES[mode].pw * 1.05;
    paddle.x = VW / 2; paddle.y = paddleY();
    resetBall(true); launch();
    hideOverlay();
    setHint(ATTRACT_HINT);
    renderHud();
  }

  function newGame(announce) {
    game.state = "ready";
    game.level = 1; game.score = 0; game.combo = 0; game.mult = 1; game.breaks = 0;
    game.lives = MODES[mode].lives; game.newBest = false; game.hadBest = game.best > 0;
    game.base = levelSpeed(); game.speed = game.base;
    levelPlan(1);
    paddle.w = MODES[mode].pw;
    paddle.x = VW / 2; paddle.y = paddleY();
    resetBall(true);
    fx.length = 0; trail.length = 0; shake = 0;
    hideOverlay();
    setHint(LAUNCH_HINT);
    renderHud();
    if (announce) say(announce);
  }

  function takeOver() {
    if (game.state !== "attract") return;
    focusOverlay = true;
    newGame("Your turn. Press space to launch the ball.");
  }

  function nextLevel() {
    game.level++;
    if (game.level % 3 === 0 && game.lives < MODES[mode].lives + 2) game.lives++;
    game.base = levelSpeed(); game.speed = game.base;
    game.combo = 0; game.mult = 1; game.breaks = 0;
    levelPlan(game.level);
    resetBall(true);
    fx.length = 0;
    game.state = "ready";
    hideOverlay();
    setHint("level " + game.level + " · " + LAUNCH_HINT);
    renderHud();
  }

  function loseLife() {
    game.lives--;
    game.combo = 0; game.mult = 1;
    beep(120, 0.24, "sawtooth", 0.05);
    if (!reduced) { shake = 9; lostFlash = 0.5; }
    trail.length = 0;
    if (game.lives <= 0) {
      game.lives = 0;
      game.state = "over";
      if (game.score > game.best) { game.best = game.score; game.newBest = true; }
      setHint("");
      focusOverlay = true;
      showOverlay(
        "bad", "game over", "Out of balls",
        game.newBest ? (game.hadBest ? "That beats your best run so far." : "That is the score to beat now.")
                     : "The wall wins this round.",
        "Play again", "space or R to play again",
        "score " + fmt(game.score) + "  ·  level " + game.level + "  ·  best " + fmt(game.best)
      );
      say("Game over. Score " + game.score + ", level " + game.level + ".");
    } else {
      game.state = "ready";
      game.speed = game.base;              // a fresh ball starts at this level's pace
      resetBall(true);
      setHint(game.lives + (game.lives === 1 ? " ball left · " : " balls left · ") + LAUNCH_HINT);
      say(game.lives + " balls left.");
    }
    renderHud();
  }

  function levelCleared() {
    var bonus = 250 + game.lives * 100;
    game.score += bonus;
    if (game.score > game.best) { game.best = game.score; game.newBest = true; }
    game.state = "clear";
    beep(660, 0.09, "triangle", 0.05);
    setTimeout(function () { beep(880, 0.12, "triangle", 0.05); }, 110);
    setHint("");
    focusOverlay = true;
    showOverlay(
      "ok", "cleared", "Level " + game.level + " cleared",
      "Every brick is gone. The next wall is a new shape and the ball starts faster.",
      "Next level", "space for the next wall",
      "clear bonus +" + fmt(bonus) + "  ·  score " + fmt(game.score)
    );
    say("Level " + game.level + " cleared. Bonus " + bonus + " points.");
    renderHud();
  }

  function pause() {
    if (game.state !== "playing" && game.state !== "ready") return;
    game.state = "paused";
    setHint("");
    focusOverlay = true;
    var fresh = (game.score === 0 && game.level === 1 && ball.vx === 0 && ball.vy === 0);
    showOverlay("", "paused", "Paused",
      fresh ? "The wall is set. Nothing moves until you say so." : "Nothing moves until you say so.",
      fresh ? "Start playing" : "Resume", "space or P to resume", null);
    renderHud();
    say("Paused.");
  }
  function resume() {
    if (game.state !== "paused") return;
    game.state = ball.vx === 0 && ball.vy === 0 ? "ready" : "playing";
    hideOverlay();
    setHint(game.state === "ready" ? LAUNCH_HINT : "");
    renderHud();
    try { canvas.focus({ preventScroll: true }); } catch (e) {}
  }

  function primary() {
    var s = game.state;
    if (s === "attract") takeOver();
    else if (s === "ready") { game.state = "playing"; launch(); setHint(""); renderHud(); }
    else if (s === "playing") pause();
    else if (s === "paused") resume();
    else if (s === "clear") nextLevel();
    else if (s === "over") newGame("New game. Press space to launch.");
  }

  /* ── input ──────────────────────────────────────────────────────────────── */
  var pointerX = null, usingPointer = false, keyL = false, keyR = false;

  function fieldX(clientX) {
    var r = canvas.getBoundingClientRect();
    if (!r.width) return VW / 2;
    return (clientX - r.left) / r.width * VW;
  }
  field.addEventListener("pointermove", function (e) {
    pointerX = fieldX(e.clientX);
    usingPointer = true;
    if (game.state === "attract") takeOver();
  });
  field.addEventListener("pointerleave", function () { field.classList.remove("aiming"); });
  field.addEventListener("pointerdown", function (e) {
    if (overlay.contains(e.target)) return;
    pointerX = fieldX(e.clientX);
    usingPointer = true;
    if (game.state === "attract") { takeOver(); return; }
    if (game.state === "ready") { game.state = "playing"; launch(); setHint(""); renderHud(); }
    try { canvas.focus({ preventScroll: true }); } catch (err) {}
    if (e.pointerType === "touch") e.preventDefault();
  });

  window.addEventListener("keydown", function (e) {
    var t = e.target, tag = t && t.tagName ? t.tagName : "";
    var onControl = (tag === "BUTTON" || tag === "INPUT" || tag === "SELECT" || tag === "TEXTAREA" || tag === "A");
    var typeAttr = (t && t.type ? String(t.type).toLowerCase() : "");
    var textish  = (tag === "TEXTAREA" || (tag === "INPUT" && typeAttr !== "checkbox" && typeAttr !== "radio" && typeAttr !== "button"));
    var typing   = (textish || tag === "SELECT");
    var k = e.key;
    if (k === "ArrowLeft" || k === "a" || k === "A") {
      keyL = true; usingPointer = false;
      if (game.state === "attract") takeOver();
      if (!onControl) e.preventDefault();
    } else if (k === "ArrowRight" || k === "d" || k === "D") {
      keyR = true; usingPointer = false;
      if (game.state === "attract") takeOver();
      if (!onControl) e.preventDefault();
    } else if (k === " " || k === "Spacebar" || k === "Enter") {
      if (onControl) return;         // let focused buttons do their own thing
      e.preventDefault();
      primary();
    } else if (k === "p" || k === "P") {
      if (typing) return;            // letters are safe even with a button focused
      if (game.state === "paused") resume();
      else { if (game.state === "attract") takeOver(); pause(); }
    } else if (k === "r" || k === "R") {
      if (typing) return;
      focusOverlay = false;
      newGame("New game.");
    }
  });
  window.addEventListener("keyup", function (e) {
    var k = e.key;
    if (k === "ArrowLeft" || k === "a" || k === "A") keyL = false;
    if (k === "ArrowRight" || k === "d" || k === "D") keyR = false;
  });
  window.addEventListener("blur", function () { keyL = keyR = false; });
  document.addEventListener("visibilitychange", function () {
    if (document.hidden && game.state === "playing") pause();
  });

  mainBtn.addEventListener("click", function () { focusOverlay = false; primary(); });
  ovBtn.addEventListener("click", function () { focusOverlay = false; primary(); });
  newBtn.addEventListener("click", function () { focusOverlay = false; newGame("New game."); });
  sndBox.addEventListener("change", function () {
    soundOn = sndBox.checked;
    if (soundOn) beep(700, 0.05, "triangle", 0.04);
  });
  modes.addEventListener("click", function (e) {
    var b = e.target.closest ? e.target.closest("button[data-m]") : null;
    if (!b) return;
    mode = parseInt(b.getAttribute("data-m"), 10) || 0;
    var all = modes.querySelectorAll("button[data-m]");
    for (var i = 0; i < all.length; i++) all[i].setAttribute("aria-pressed", all[i] === b ? "true" : "false");
    modeCap.textContent = MODES[mode].cap;
    focusOverlay = false;
    newGame(MODES[mode].name + " difficulty. New game.");
  });

  /* ── simulation ─────────────────────────────────────────────────────────── */
  var FIXED = 1 / 120;

  function paddleTop() { return paddle.y - paddle.h / 2; }

  function movePaddle(dt) {
    var prev = paddle.x;
    if (game.state === "attract") {
      var aim = ball.vy > 0 ? ball.x : (ball.x + VW / 2) / 2;
      var lag = 7.5;
      paddle.x += (aim - paddle.x) * Math.min(1, lag * dt);
    } else if (usingPointer && pointerX !== null) {
      paddle.x = pointerX;
    } else {
      var v = 980 * dt;
      if (keyL) paddle.x -= v;
      if (keyR) paddle.x += v;
    }
    var half = paddle.w / 2;
    if (paddle.x < half) paddle.x = half;
    if (paddle.x > VW - half) paddle.x = VW - half;
    paddle.vx = dt > 0 ? (paddle.x - prev) / dt : 0;
  }

  function bumpSpeed(f) {
    game.speed = Math.min(speedCap(), game.speed * f);
    var s = Math.sqrt(ball.vx * ball.vx + ball.vy * ball.vy);
    if (s > 0.001) { ball.vx = ball.vx / s * game.speed; ball.vy = ball.vy / s * game.speed; }
  }

  function hitBrick(idx, cx, cy) {
    var was = grid.hp[idx];
    grid.hp[idx] = was - 1;
    var mult = game.mult;
    if (grid.hp[idx] > 0) {
      game.score += 4 * mult;
      beep(300 + was * 60, 0.035, "square", 0.035);
      burst(cx, cy, BRICK[was], 4, 0.6);
    } else {
      game.left--;
      game.breaks++;
      game.combo++;
      game.mult = Math.min(5, 1 + Math.floor(game.combo / 3));
      var pts = (10 + 10 * grid.hp0[idx]) * mult;
      game.score += pts;
      beep(420 + was * 90, 0.055, "square", 0.05);
      burst(cx, cy, BRICK[was], 11, 1);
      if (!reduced) shake = Math.min(6, 2.2 + was * 0.8);
      pop(cx, cy, "+" + pts, false);
      if (game.breaks % 6 === 0) bumpSpeed(1.03);
      if (game.score > game.best && game.state !== "attract") {
        if (!game.newBest) { game.newBest = true; say("New best score."); }
        game.best = game.score;
      }
    }
    dirty = true;
  }

  function brickSweep() {
    var bw = brickW(), bh = brickH(), top = brickTop(), left = PAD_X;
    if (ball.y + ball.r < top || ball.y - ball.r > top + grid.rows * bh) return false;
    var c0 = Math.floor((ball.x - ball.r - left) / bw), c1 = Math.floor((ball.x + ball.r - left) / bw);
    var r0 = Math.floor((ball.y - ball.r - top) / bh), r1 = Math.floor((ball.y + ball.r - top) / bh);
    if (c0 < 0) c0 = 0; if (c1 > grid.cols - 1) c1 = grid.cols - 1;
    if (r0 < 0) r0 = 0; if (r1 > grid.rows - 1) r1 = grid.rows - 1;
    for (var r = r0; r <= r1; r++) {
      for (var c = c0; c <= c1; c++) {
        var idx = r * grid.cols + c;
        if (!grid.hp[idx]) continue;
        var bx = left + c * bw, by = top + r * bh;
        var nx = Math.max(bx, Math.min(ball.x, bx + bw));
        var ny = Math.max(by, Math.min(ball.y, by + bh));
        var dx = ball.x - nx, dy = ball.y - ny;
        if (dx * dx + dy * dy > ball.r * ball.r) continue;
        var cx = bx + bw / 2, cy = by + bh / 2;
        var ox = (bw / 2 + ball.r) - Math.abs(ball.x - cx);
        var oy = (bh / 2 + ball.r) - Math.abs(ball.y - cy);
        if (ox < oy) {
          ball.vx = -ball.vx;
          ball.x += (ball.x < cx ? -1 : 1) * (ox + 0.01);
        } else {
          ball.vy = -ball.vy;
          ball.y += (ball.y < cy ? -1 : 1) * (oy + 0.01);
        }
        hitBrick(idx, cx, cy);
        return true;
      }
    }
    return false;
  }

  function paddleHit() {
    var top = paddleTop();
    if (ball.vy <= 0) return;
    if (ball.y + ball.r < top || ball.y - ball.r > paddle.y + paddle.h) return;
    var half = paddle.w / 2;
    if (ball.x < paddle.x - half - ball.r || ball.x > paddle.x + half + ball.r) return;
    var t = (ball.x - paddle.x) / half;
    if (t < -1) t = -1; if (t > 1) t = 1;
    t += Math.max(-0.35, Math.min(0.35, paddle.vx / 2600));   // a moving paddle pushes the ball
    if (t < -1) t = -1; if (t > 1) t = 1;
    var a = t * 1.0472;                                        // up to 60° off vertical
    // A dead-centre hit off a still paddle returns the ball perfectly vertical —
    // and that is an absorbing state: it comes straight back down to the same
    // spot, the paddle never has to move, and the ball bounces in one empty
    // column forever. Keep a few degrees of lean so the wall always gets eaten.
    if (Math.abs(a) < 0.155) {
      var side = a !== 0 ? (a < 0 ? -1 : 1)
               : paddle.vx !== 0 ? (paddle.vx < 0 ? -1 : 1)
               : ball.vx !== 0 ? (ball.vx < 0 ? -1 : 1)
               : (Math.random() < 0.5 ? -1 : 1);
      a = side * 0.155;                                        // ~9° off vertical
    }
    game.speed = Math.min(speedCap(), game.speed * 1.012);
    ball.vx = Math.sin(a) * game.speed;
    ball.vy = -Math.abs(Math.cos(a) * game.speed);
    ball.y = top - ball.r - 0.5;
    game.combo = 0; game.mult = 1;   // the readout must mean the same thing in attract
    beep(190 + Math.abs(t) * 110, 0.045, "square", 0.045);
    if (!reduced) shake = Math.max(shake, 1.4);
    dirty = true;
  }

  function stepBall(dt) {
    var dist = Math.sqrt(ball.vx * ball.vx + ball.vy * ball.vy) * dt;
    var steps = Math.max(1, Math.ceil(dist / (ball.r * 0.55)));
    var sdt = dt / steps;
    for (var i = 0; i < steps; i++) {
      ball.x += ball.vx * sdt;
      ball.y += ball.vy * sdt;
      if (ball.x < ball.r) { ball.x = ball.r; ball.vx = Math.abs(ball.vx); beep(240, 0.03, "square", 0.03); }
      else if (ball.x > VW - ball.r) { ball.x = VW - ball.r; ball.vx = -Math.abs(ball.vx); beep(240, 0.03, "square", 0.03); }
      if (ball.y < ball.r) { ball.y = ball.r; ball.vy = Math.abs(ball.vy); beep(260, 0.03, "square", 0.03); }
      brickSweep();
      paddleHit();
      if (ball.y - ball.r > VH) return true;
    }
    return false;
  }

  function update(dt) {
    movePaddle(dt);
    var s = game.state;
    if (s === "ready") {
      ball.x = paddle.x;
      ball.y = paddleTop() - ball.r - 1;
      return;
    }
    if (s !== "playing" && s !== "attract") return;

    var lost = stepBall(dt);

    if (game.left <= 0) {
      if (s === "attract") { levelPlan(game.level); game.speed = game.base; resetBall(true); launch(); }
      else levelCleared();
      return;
    }
    if (lost) {
      if (s === "attract") { game.speed = game.base; resetBall(true); launch(); game.combo = 0; game.mult = 1; }
      else loseLife();
    }
  }

  /* ── effects ────────────────────────────────────────────────────────────── */
  function burst(x, y, col, n, power) {
    if (reduced) return;
    if (fx.length > 220) return;
    for (var i = 0; i < n; i++) {
      var a = Math.random() * Math.PI * 2;
      var sp = (70 + Math.random() * 190) * power;
      fx.push({ x: x, y: y, vx: Math.cos(a) * sp, vy: Math.sin(a) * sp - 40, life: 1, c: col, r: 1.6 + Math.random() * 2.4 });
    }
  }
  function stepFx(dt) {
    for (var i = fx.length - 1; i >= 0; i--) {
      var p = fx[i];
      p.life -= dt * 1.9;
      if (p.life <= 0) { fx.splice(i, 1); continue; }
      p.vy += 620 * dt;
      p.x += p.vx * dt; p.y += p.vy * dt;
    }
    if (shake > 0) shake = Math.max(0, shake - dt * 26);
    if (lostFlash > 0) lostFlash = Math.max(0, lostFlash - dt * 1.4);
  }

  /* ── drawing ────────────────────────────────────────────────────────────── */
  function rr(x, y, w, h, r) {
    if (w < 2 * r) r = w / 2;
    if (h < 2 * r) r = h / 2;
    ctx.beginPath();
    ctx.moveTo(x + r, y);
    ctx.arcTo(x + w, y, x + w, y + h, r);
    ctx.arcTo(x + w, y + h, x, y + h, r);
    ctx.arcTo(x, y + h, x, y, r);
    ctx.arcTo(x, y, x + w, y, r);
    ctx.closePath();
  }

  function draw() {
    var sx = 0, sy = 0;
    if (shake > 0) { sx = (Math.random() - 0.5) * shake; sy = (Math.random() - 0.5) * shake; }
    ctx.setTransform(DPR * SCALE, 0, 0, DPR * SCALE, DPR * sx * SCALE, DPR * sy * SCALE);

    // field
    ctx.fillStyle = rgb(COL.surface);
    ctx.fillRect(-20, -20, VW + 40, VH + 40);

    // faint dot grid
    ctx.fillStyle = rgba(COL.line, 0.85);
    var step = 40;
    for (var gx = step / 2; gx < VW; gx += step) {
      for (var gy = step / 2; gy < VH; gy += step) ctx.fillRect(gx - 1, gy - 1, 2, 2);
    }

    // the floor line
    ctx.strokeStyle = rgba(COL.muted, lostFlash > 0 ? 0.5 : 0.22);
    ctx.lineWidth = 2;
    ctx.setLineDash([9, 9]);
    ctx.beginPath();
    ctx.moveTo(0, VH - 5); ctx.lineTo(VW, VH - 5);
    ctx.stroke();
    ctx.setLineDash([]);

    // bricks
    var bw = brickW(), bh = brickH(), top = brickTop(), gap = 3.5;
    for (var r = 0; r < grid.rows; r++) {
      for (var c = 0; c < grid.cols; c++) {
        var idx = r * grid.cols + c, hp = grid.hp[idx];
        if (!hp) continue;
        var x = PAD_X + c * bw + gap / 2, y = top + r * bh + gap / 2;
        var w = bw - gap, h = bh - gap;
        var col = BRICK[hp] || BRICK[1];
        rr(x, y, w, h, 4);
        ctx.fillStyle = rgb(col);
        ctx.fill();
        ctx.strokeStyle = rgba(COL.ink, 0.10);
        ctx.lineWidth = 1;
        ctx.stroke();
        // gloss
        ctx.fillStyle = "rgba(255,255,255,0.10)";
        ctx.fillRect(x + 3, y + 2.5, w - 6, 2);
        // damage marks
        var dmg = grid.hp0[idx] - hp;
        if (dmg > 0) {
          ctx.strokeStyle = rgba(COL.ink, 0.20);
          ctx.lineWidth = 1.4;
          for (var d = 0; d < dmg && d < 3; d++) {
            var px = x + w * (0.24 + d * 0.26);
            ctx.beginPath();
            ctx.moveTo(px, y + h * 0.24);
            ctx.lineTo(px + w * 0.09, y + h * 0.76);
            ctx.stroke();
          }
        }
      }
    }

    // particles
    for (var i = 0; i < fx.length; i++) {
      var p = fx[i];
      ctx.fillStyle = rgba(p.c, Math.max(0, Math.min(1, p.life)) * 0.9);
      ctx.fillRect(p.x - p.r, p.y - p.r, p.r * 2, p.r * 2);
    }

    // trail
    if (!reduced) {
      for (var t = 0; t < trail.length; t++) {
        var q = trail[t], f = (t + 1) / trail.length;
        ctx.fillStyle = rgba(COL.accent, 0.03 + f * 0.14);
        ctx.beginPath();
        ctx.arc(q.x, q.y, ball.r * (0.30 + f * 0.62), 0, Math.PI * 2);
        ctx.fill();
      }
    }

    // paddle
    var pw = paddle.w, ph = paddle.h, px2 = paddle.x - pw / 2, py2 = paddle.y - ph / 2;
    rr(px2, py2, pw, ph, ph / 2);
    ctx.fillStyle = rgb(COL.accent);
    ctx.fill();
    ctx.fillStyle = "rgba(255,255,255,0.16)";
    ctx.fillRect(px2 + 5, py2 + 2.5, pw - 10, 2.5);
    // aim ticks: shows which way each part of the paddle sends the ball
    ctx.strokeStyle = rgba(COL.surface, 0.55);
    ctx.lineWidth = 1.4;
    for (var k = -1; k <= 1; k++) {
      if (!k) continue;
      var tx = paddle.x + k * pw * 0.30;
      ctx.beginPath(); ctx.moveTo(tx, py2 + 4); ctx.lineTo(tx, py2 + ph - 4); ctx.stroke();
    }

    // ball
    if (game.state !== "over") {
      ctx.fillStyle = rgb(COL.ink);
      ctx.beginPath();
      ctx.arc(ball.x, ball.y, ball.r, 0, Math.PI * 2);
      ctx.fill();
      ctx.fillStyle = "rgba(255,255,255,0.22)";
      ctx.beginPath();
      ctx.arc(ball.x - ball.r * 0.3, ball.y - ball.r * 0.32, ball.r * 0.34, 0, Math.PI * 2);
      ctx.fill();
    }

    // dim while an overlay is up (paused / cleared / over) is handled in HTML
    ctx.setTransform(1, 0, 0, 1, 0, 0);
  }

  /* ── loop ───────────────────────────────────────────────────────────────── */
  var last = 0, acc = 0, hudAcc = 0, trailAcc = 0;
  function frame(ts) {
    requestAnimationFrame(frame);
    if (!last) last = ts;
    var dt = (ts - last) / 1000;
    last = ts;
    if (dt > 0.25) dt = 0.25;

    var s = game.state;
    var sim = (s === "playing" || s === "attract" || s === "ready");

    if (sim) {
      acc += dt;
      var n = 0;
      while (acc >= FIXED && n < 10) { update(FIXED); acc -= FIXED; n++; s = game.state; }
      if (acc > FIXED * 10) acc = 0;
      trailAcc += dt;
      if (!reduced && trailAcc > 0.022 && (game.state === "playing" || game.state === "attract")) {
        trailAcc = 0;
        trail.push({ x: ball.x, y: ball.y });
        if (trail.length > 7) trail.shift();
      }
    } else { acc = 0; }

    stepFx(dt);

    hudAcc += dt;
    if (sim && hudAcc > 0.1) { hudAcc = 0; renderHud(); }

    if (sim || fx.length || shake > 0 || dirty) { draw(); dirty = false; }
  }

  /* ── boot ───────────────────────────────────────────────────────────────── */
  modeCap.textContent = MODES[mode].cap;
  readTheme();
  resize();
  if (window.ResizeObserver) new ResizeObserver(resize).observe(field);
  window.addEventListener("resize", resize);
  window.addEventListener("orientationchange", function () { setTimeout(resize, 120); });

  if (reduced) {
    // no unexpected motion: lay the wall out and wait to be asked
    var ledeStart = document.getElementById("ledeStart");
    if (ledeStart) {
      ledeStart.innerHTML = touchy
        ? "The wall is set and nothing moves until you say so — press <b>Start playing</b>."
        : "The wall is set and nothing moves until you say so — press <b>Start playing</b> or <kbd>space</kbd>.";
    }
    newGame(null);
    game.state = "paused";
    setHint("");
    showOverlay("", "ready", "Breakout",
      touchy ? "A wall of bricks, one ball, one paddle. Drag on the field to move the paddle."
             : "A wall of bricks, one ball, one paddle. Arrow keys or the mouse move the paddle.",
      "Start playing", touchy ? "tap to start" : "space to start", null);
  } else {
    startAttract();
  }
  renderHud();
  requestAnimationFrame(frame);
})();
</script>
</body>
</html>