Focus Timer

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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">
<meta name="color-scheme" content="light dark">
<title>Focus Timer — 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: alpha values and on-color pairs the tokens don't carry */
:root {
  --on-accent: #FFFFFF;        /* on solid --accent #C05600 → contrast 4.6 */
  --on-run: #FFFFFF;           /* on solid --run #1A7F37 → contrast 5.1 */
  --accent-ink: #9A4500;       /* accent as SMALL TEXT: 6.3 on --dial, 6.0 on --accent-soft */
  --ring-a: #C2500C;           /* ring gradient, warm end */
  --ring-b: #C05600;
  --ring-c: #D48C52;           /* ring gradient, lit end */
  --shadow: 0 1px 2px rgba(26,29,33,.06), 0 8px 24px rgba(26,29,33,.05);
  --tick: rgba(26,29,33,.16);
  --tick-major: rgba(26,29,33,.30);
  --dial: #FBFBF9;             /* inner dial face, a touch off the surface */
  --hair: rgba(26,29,33,.06);
  --glow-op: .30;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --on-accent: #14161A;      /* on solid --accent #FFB454 → contrast 10.9 */
    --on-run: #071B0C;         /* on solid --run #3FB950 → contrast 9.8 */
    --accent-ink: #FFB454;     /* on dark surfaces the accent already clears AA */
    --ring-a: #FDA558; --ring-b: #FFB454; --ring-c: #FFCC8B;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 26px rgba(0,0,0,.35);
    --tick: rgba(232,230,225,.16);
    --tick-major: rgba(232,230,225,.34);
    --dial: #191C22;
    --hair: rgba(232,230,225,.06);
    --glow-op: .42;
  }
}
:root[data-theme="dark"] {
  --on-accent: #14161A;
  --on-run: #071B0C;
  --accent-ink: #FFB454;
  --ring-a: #FDA558; --ring-b: #FFB454; --ring-c: #FFCC8B;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 26px rgba(0,0,0,.35);
  --tick: rgba(232,230,225,.16);
  --tick-major: rgba(232,230,225,.34);
  --dial: #191C22;
  --hair: rgba(232,230,225,.06);
  --glow-op: .42;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  min-height: 100%;
  -webkit-text-size-adjust: 100%;
  line-height: 1.5;
  overflow-x: hidden;
}
.wrap {
  max-width: 1020px;
  margin: 0 auto;
  padding: 22px 16px 28px;
}

/* ── header ─────────────────────────────────────────────────────────────── */
header { margin-bottom: 18px; }
h1 {
  margin: 0 0 4px;
  font-size: 1.35rem;
  letter-spacing: -0.015em;
  font-weight: 620;
}
.lede { margin: 0; color: var(--muted); font-size: .95rem; max-width: 62ch; }

/* ── layout ─────────────────────────────────────────────────────────────── */
.grid { display: grid; gap: 16px; grid-template-columns: 1fr; align-items: start; }
@media (min-width: 860px) {
  .grid { grid-template-columns: minmax(0,1.05fr) minmax(300px,.95fr); gap: 18px; }
}
.side { display: grid; gap: 16px; grid-template-columns: 1fr; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card > h2 {
  margin: 0;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.card .body { padding: 14px; }

/* ── hero / ring ────────────────────────────────────────────────────────── */
.hero .body { padding: 18px 14px 16px; display: grid; justify-items: center; gap: 14px; }

.ringbtn {
  appearance: none;
  -webkit-appearance: none;
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  cursor: pointer;
  display: block;
  position: relative;
  width: min(320px, 78vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  color: inherit;
  touch-action: manipulation;
}
.ringbtn svg { display: block; width: 100%; height: 100%; overflow: visible; }
.ringbtn:focus-visible { outline: 2px solid var(--accent); outline-offset: 6px; }

.dialface { fill: var(--dial); stroke: var(--hair); stroke-width: 1; }
.track { fill: none; stroke: var(--line); stroke-width: 12; }
.prog {
  fill: none;
  stroke-width: 12;
  stroke-linecap: round;
  transition: stroke-dashoffset .22s linear;
}
.prog.focus { stroke: url(#gradFocus); }
.prog.rest  { stroke: var(--muted); stroke-width: 9; opacity: .85; }
.glow {
  fill: none;
  stroke: var(--accent);
  stroke-width: 14;
  stroke-linecap: round;
  filter: url(#soften);
  opacity: 0;
  transition: stroke-dashoffset .22s linear, opacity .3s ease;
}
[data-phase="focus"] .glow { opacity: var(--glow-op); }
.head { fill: var(--accent); stroke: var(--surface); stroke-width: 3; }
[data-phase="rest"] .head { fill: var(--muted); }
[data-phase="rest"] .headring { opacity: 0; }
.headring { fill: none; stroke: var(--accent); stroke-width: 1.5; opacity: .45; }
.tickline { stroke: var(--tick); stroke-width: 1.5; stroke-linecap: round; }
.tickline.maj { stroke: var(--tick-major); stroke-width: 2.5; }

[data-phase="focus"] .ringbtn.running .headring { animation: ping 2.4s ease-out infinite; }
@keyframes ping {
  0%   { r: 10; opacity: .5; }
  70%  { r: 20; opacity: 0; }
  100% { r: 20; opacity: 0; }
}

.center {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 2px;
  pointer-events: none;
  padding: 0 14%;
  text-align: center;
}
.phase {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--accent-ink);
}
[data-phase="rest"] .phase { color: var(--muted); }
.time {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.5rem, 15.5vw, 3.5rem);
  line-height: 1.02;
  font-weight: 640;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.subline {
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--muted);
  letter-spacing: .02em;
  white-space: nowrap;
}

/* ── dots ───────────────────────────────────────────────────────────────── */
.dots { display: flex; gap: 8px; align-items: center; justify-content: center; min-height: 12px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--line); flex: none; transition: background .25s ease, box-shadow .25s ease; }
.dot.done { background: var(--run); }
.dot.now { background: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

/* ── controls ───────────────────────────────────────────────────────────── */
.controls { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; width: 100%; }
.btn {
  font: inherit;
  font-size: .875rem;
  padding: 9px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  transition: background .15s ease, border-color .15s ease, transform .06s ease;
  touch-action: manipulation;
}
.btn:hover { background: var(--accent-soft); border-color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn .k {
  font-family: var(--font-mono);
  font-size: .66rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0 4px;
  line-height: 1.45;
}
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  min-width: 132px;
  justify-content: center;
}
.btn.primary:hover { filter: brightness(1.06); background: var(--accent); }
.btn.primary .k { color: var(--on-accent); border-color: currentColor; opacity: .65; }
.preset[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); }
.btn.hushed { color: var(--muted); }
.btn .ico { width: 15px; height: 15px; flex: none; }

.status {
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--muted);
  text-align: center;
  min-height: 1.35em;
  display: flex;
  gap: 7px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}
.status.good { color: var(--run); }
.chip {
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-weight: 600;
  white-space: nowrap;
}
.chip.on { border-color: var(--run); color: var(--run); background: var(--run-soft); }

/* ── stats ──────────────────────────────────────────────────────────────── */
.stats { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 10px; }
.stat { display: grid; gap: 1px; min-width: 0; }
.stat .v {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.28rem;
  font-weight: 620;
  letter-spacing: -0.02em;
  overflow-wrap: anywhere;
}
.stat .l {
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ── settings ───────────────────────────────────────────────────────────── */
.presets { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.preset { font-size: .78rem; padding: 6px 10px; }
.preset .n { font-family: var(--font-mono); color: var(--muted); font-size: .72rem; }
.preset[aria-pressed="true"] .n { color: var(--accent-ink); }
.fields { display: grid; gap: 9px; }
.field { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 10px; }
.field label { font-size: .85rem; min-width: 0; }
.field .unit { font-family: var(--font-mono); font-size: .68rem; color: var(--muted); }
.spin { display: flex; align-items: center; gap: 0; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--surface); }
.spin button {
  font: inherit;
  width: 30px;
  height: 32px;
  border: 0;
  background: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  display: grid;
  place-items: center;
  touch-action: manipulation;
}
.spin button:hover { background: var(--accent-soft); color: var(--accent-ink); }
.spin button:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.spin input {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .9rem;
  font-weight: 600;
  width: 44px;
  height: 32px;
  text-align: center;
  border: 0;
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  padding: 0;
  -moz-appearance: textfield;
}
.spin input::-webkit-outer-spin-button,
.spin input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.spin input:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

/* ── log ────────────────────────────────────────────────────────────────── */
.log { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }
.log li {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
  font-size: .85rem;
}
.log li:last-child { border-bottom: 0; padding-bottom: 0; }
.log li:first-child { padding-top: 0; }
.log .when { font-family: var(--font-mono); font-size: .74rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.log .what { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.log .len { font-family: var(--font-mono); font-size: .76rem; font-variant-numeric: tabular-nums; color: var(--ink); }
.log li.sample .when, .log li.sample .what, .log li.sample .len { opacity: .62; }
.mark { width: 7px; height: 7px; border-radius: 50%; background: var(--run); flex: none; }
.empty { color: var(--muted); font-size: .85rem; margin: 0; }

.keys {
  font-family: var(--font-mono);
  font-size: .68rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  justify-content: center;
}
.keys kbd {
  font-family: inherit;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0 4px;
  color: var(--ink);
  background: var(--bg);
}

footer {
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--muted);
}

@media (max-width: 400px) {
  .wrap { padding: 16px 12px 22px; }
  .btn.primary { min-width: 118px; }
  .stats { gap: 8px; }
  .stat .v { font-size: 1.1rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  .headring { opacity: .45; }
}
</style>
</head>
<body>
<div class="wrap">

  <header>
    <h1>Focus Timer</h1>
    <p class="lede">Work for 25 minutes, rest for 5, repeat. The ring is the whole story: how much of this stretch is
      left, and a chime when it flips. Change the minutes to whatever actually suits you.</p>
  </header>

  <main class="grid">

    <section class="card hero" id="hero" data-phase="focus">
      <h2><span>timer</span><span class="chip" id="sampleChip">sample state</span></h2>
      <div class="body">

        <button class="ringbtn" id="ringBtn" type="button" aria-label="Start the timer">
          <svg viewBox="0 0 280 280" aria-hidden="true" focusable="false">
            <defs>
              <linearGradient id="gradFocus" x1="0" y1="1" x2="1" y2="0">
                <stop offset="0"   stop-color="#C2500C" style="stop-color: var(--ring-a)"/>
                <stop offset=".55" stop-color="#C05600" style="stop-color: var(--ring-b)"/>
                <stop offset="1"   stop-color="#D48C52" style="stop-color: var(--ring-c)"/>
              </linearGradient>
              <filter id="soften" x="-25%" y="-25%" width="150%" height="150%">
                <feGaussianBlur stdDeviation="7"/>
              </filter>
            </defs>
            <circle class="dialface" cx="140" cy="140" r="104"/>
            <g id="ticks"></g>
            <circle class="track" cx="140" cy="140" r="112"/>
            <circle class="glow" id="glowArc" cx="140" cy="140" r="112" transform="rotate(-90 140 140)"/>
            <circle class="prog focus" id="progArc" cx="140" cy="140" r="112" transform="rotate(-90 140 140)"/>
            <g id="headG" transform="rotate(-90 140 140)">
              <circle class="headring" cx="252" cy="140" r="10"/>
              <circle class="head" cx="252" cy="140" r="7"/>
            </g>
          </svg>
          <span class="center">
            <span class="phase" id="phaseLabel">Focus</span>
            <span class="time" id="timeLabel">16:30</span>
            <span class="subline" id="subLabel">sample · press space</span>
          </span>
        </button>

        <div class="dots" id="dots" role="img" aria-label="Cycle progress"></div>

        <div class="controls">
          <button class="btn primary" id="startBtn" type="button">
            <span id="startIco"></span>
            <span id="startText">Start</span>
            <span class="k">space</span>
          </button>
          <button class="btn" id="skipBtn" type="button" title="Jump to the next stretch">
            <svg class="ico" viewBox="0 0 24 24" aria-hidden="true"><path d="M6 5.5v13l9-6.5-9-6.5z" fill="currentColor"/><rect x="16.5" y="5.5" width="2.4" height="13" rx="1" fill="currentColor"/></svg>
            Skip
          </button>
          <button class="btn" id="resetBtn" type="button" title="Back to the start of a focus stretch">
            <svg class="ico" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.1" stroke-linecap="round" aria-hidden="true"><path d="M4.5 12a7.5 7.5 0 1 0 2.4-5.5"/><path d="M4 4v4h4"/></svg>
            Reset
          </button>
          <button class="btn" id="soundBtn" type="button" aria-pressed="true" aria-label="Chime is on. Turn it off.">
            <span id="soundIco"></span>
            <span id="soundText">Chime on</span>
          </button>
        </div>

        <p class="status" id="status" role="status" aria-live="polite"></p>

        <p class="keys">
          <span><kbd>space</kbd> start / pause</span>
          <span><kbd>s</kbd> skip</span>
          <span><kbd>r</kbd> reset</span>
          <span><kbd>m</kbd> chime</span>
        </p>
      </div>
    </section>

    <div class="side">

      <section class="card">
        <h2><span>today</span><span id="setLabel">3/4 to long rest</span></h2>
        <div class="body">
          <div class="stats">
            <div class="stat"><span class="v" id="statSessions">3</span><span class="l">sessions</span></div>
            <div class="stat"><span class="v" id="statTime">1h 15m</span><span class="l">focused</span></div>
            <div class="stat"><span class="v" id="statNext">15m</span><span class="l">next rest</span></div>
          </div>
        </div>
      </section>

      <section class="card">
        <h2><span>lengths</span><span id="cycleSum">25 / 5 / 15</span></h2>
        <div class="body">
          <div class="presets" id="presets"></div>
          <div class="fields" id="fields"></div>
        </div>
      </section>

      <section class="card">
        <h2><span>finished stretches</span><span id="logCount">3 logged</span></h2>
        <div class="body">
          <ul class="log" id="log"></ul>
          <p class="empty" id="logEmpty" hidden>Nothing finished yet — the first completed stretch lands here.</p>
        </div>
      </section>

    </div>
  </main>

  <footer>
    <span>demo · sloprun.dev</span>
    <span id="engine">pomodoro · web audio chime · no storage</span>
  </footer>
</div>

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

  /* ---------- platform theme bridge ---------- */
  addEventListener("message", function (e) {
    var d = e && e.data;
    if (d && d.type === "sloprun:theme" && (d.theme === "light" || d.theme === "dark")) {
      document.documentElement.setAttribute("data-theme", d.theme);
    }
  });

  /* ---------- elements ---------- */
  var $ = function (id) { return document.getElementById(id); };
  var hero = $("hero"), ringBtn = $("ringBtn"), progArc = $("progArc"), glowArc = $("glowArc");
  var headG = $("headG"), ticksG = $("ticks");
  var phaseLabel = $("phaseLabel"), timeLabel = $("timeLabel"), subLabel = $("subLabel");
  var dotsEl = $("dots"), statusEl = $("status"), sampleChip = $("sampleChip");
  var startBtn = $("startBtn"), startText = $("startText"), startIco = $("startIco"), skipBtn = $("skipBtn");
  var resetBtn = $("resetBtn"), soundBtn = $("soundBtn"), soundText = $("soundText"), soundIco = $("soundIco");
  var statSessions = $("statSessions"), statTime = $("statTime"), statNext = $("statNext");
  var setLabel = $("setLabel"), cycleSum = $("cycleSum"), presetsEl = $("presets"), fieldsEl = $("fields");
  var logEl = $("log"), logEmpty = $("logEmpty"), logCount = $("logCount");

  var C = 2 * Math.PI * 112;            /* ring circumference, r = 112 */

  /* ---------- state ---------- */
  var LEN = { focus: 25, rest: 5, longRest: 15, perSet: 4 };   /* minutes / count */
  var LIMITS = { focus: [1, 90], rest: [1, 30], longRest: [1, 60], perSet: [2, 8] };

  var st = {
    phase: "focus",       /* focus | rest | longRest */
    running: false,
    elapsed: 0,           /* ms into the current stretch */
    startedAt: 0,         /* performance.now() minus elapsed */
    done: 0,              /* finished focus stretches */
    inSet: 0,             /* finished focus stretches since the last long rest */
    focusedMs: 0,
    muted: false,
    sample: true,
    log: []
  };

  /* ---------- preloaded sample so the demo opens mid-flow ---------- */
  (function seed() {
    var now = Date.now();
    var mins = [36, 66, 96];        /* newest first, same order live entries land in */
    for (var i = 0; i < mins.length; i++) {
      st.log.push({ label: "Focus", min: 25, at: now - mins[i] * 60000, sample: true });
    }
    st.done = 3;
    st.inSet = 3;
    st.focusedMs = 75 * 60000;
    st.elapsed = 8 * 60000 + 30000;     /* opens at 16:30 left on the fourth stretch */
  })();

  /* ---------- helpers ---------- */
  function totalMs() {
    if (st.phase === "focus") return LEN.focus * 60000;
    if (st.phase === "rest") return LEN.rest * 60000;
    return LEN.longRest * 60000;
  }
  function phaseName(p) {
    return p === "focus" ? "Focus" : p === "rest" ? "Short rest" : "Long rest";
  }
  function clampInt(v, lo, hi) {
    v = Math.round(Number(v));
    if (!isFinite(v)) v = lo;
    return Math.max(lo, Math.min(hi, v));
  }
  function mmss(ms) {
    var s = Math.max(0, Math.ceil(ms / 1000));
    var m = Math.floor(s / 60);
    var r = s % 60;
    return (m < 10 ? "0" : "") + m + ":" + (r < 10 ? "0" : "") + r;
  }
  function human(ms) {
    var m = Math.round(ms / 60000);
    if (m < 60) return m + "m";
    var h = Math.floor(m / 60);
    return h + "h " + (m % 60) + "m";
  }
  function clockAt(ms) {
    var d = new Date(Date.now() + ms);
    try {
      return d.toLocaleTimeString([], { hour: "2-digit", minute: "2-digit" });
    } catch (e) {
      var hh = d.getHours(), mm = d.getMinutes();
      return (hh < 10 ? "0" : "") + hh + ":" + (mm < 10 ? "0" : "") + mm;
    }
  }
  function clockOf(t) {
    var d = new Date(t);
    try {
      return d.toLocaleTimeString([], { hour: "2-digit", minute: "2-digit" });
    } catch (e) {
      var hh = d.getHours(), mm = d.getMinutes();
      return (hh < 10 ? "0" : "") + hh + ":" + (mm < 10 ? "0" : "") + mm;
    }
  }

  /* ---------- chime (web audio, built from scratch, no files) ---------- */
  var ac = null;
  function audio() {
    if (!ac) {
      var Ctx = window.AudioContext || window.webkitAudioContext;
      if (!Ctx) return null;
      try { ac = new Ctx(); } catch (e) { return null; }
    }
    if (ac.state === "suspended" && ac.resume) { try { ac.resume(); } catch (e) {} }
    return ac;
  }
  function bell(a, out, freq, at, dur, gain) {
    var o = a.createOscillator(), g = a.createGain();
    o.type = "sine";
    o.frequency.setValueAtTime(freq, at);
    g.gain.setValueAtTime(0.0001, at);
    g.gain.exponentialRampToValueAtTime(gain, at + 0.012);
    g.gain.exponentialRampToValueAtTime(0.0001, at + dur);
    o.connect(g); g.connect(out);
    o.start(at);
    o.stop(at + dur + 0.05);
  }
  function chime(kind) {
    if (st.muted) return true;
    var a = audio();
    if (!a) return false;
    var out = a.createGain();
    out.gain.value = 0.9;
    var lp = a.createBiquadFilter();
    lp.type = "lowpass";
    lp.frequency.value = 3200;
    lp.Q.value = 0.4;
    lp.connect(out);
    out.connect(a.destination);
    /* rising three-note figure to end focus, softer falling pair to end a rest */
    var notes = kind === "focus" ? [523.25, 659.25, 987.77] : [659.25, 493.88];
    var t0 = a.currentTime + 0.03;
    for (var i = 0; i < notes.length; i++) {
      var at = t0 + i * 0.135;
      bell(a, lp, notes[i], at, 1.9, kind === "focus" ? 0.16 : 0.12);
      bell(a, lp, notes[i] * 2, at, 0.7, 0.045);          /* a little shimmer on top */
    }
    /* let the graph fall out of scope once it has rung out */
    setTimeout(function () { try { out.disconnect(); lp.disconnect(); } catch (e) {} }, 3200);
    return true;
  }

  /* ---------- ticks around the dial ---------- */
  (function drawTicks() {
    var frag = document.createDocumentFragment();
    for (var i = 0; i < 60; i++) {
      var maj = i % 5 === 0;
      var a = (i / 60) * Math.PI * 2 - Math.PI / 2;
      var r1 = maj ? 124 : 127, r2 = maj ? 133 : 132;
      var ln = document.createElementNS("http://www.w3.org/2000/svg", "line");
      ln.setAttribute("x1", (140 + Math.cos(a) * r1).toFixed(2));
      ln.setAttribute("y1", (140 + Math.sin(a) * r1).toFixed(2));
      ln.setAttribute("x2", (140 + Math.cos(a) * r2).toFixed(2));
      ln.setAttribute("y2", (140 + Math.sin(a) * r2).toFixed(2));
      ln.setAttribute("class", "tickline" + (maj ? " maj" : ""));
      frag.appendChild(ln);
    }
    ticksG.appendChild(frag);
  })();

  /* ---------- settings UI ---------- */
  var FIELDS = [
    { key: "focus", label: "Focus stretch", unit: "min" },
    { key: "rest", label: "Short rest", unit: "min" },
    { key: "longRest", label: "Long rest", unit: "min" },
    { key: "perSet", label: "Stretches before a long rest", unit: "" }
  ];
  var inputs = {};
  FIELDS.forEach(function (f) {
    var row = document.createElement("div");
    row.className = "field";
    var lab = document.createElement("label");
    lab.setAttribute("for", "in_" + f.key);
    lab.textContent = f.label;
    if (f.unit) {
      var u = document.createElement("span");
      u.className = "unit";
      u.textContent = " (" + f.unit + ")";
      lab.appendChild(u);
    }
    var spin = document.createElement("div");
    spin.className = "spin";

    var minus = document.createElement("button");
    minus.type = "button";
    minus.textContent = "−";
    minus.setAttribute("aria-label", "Decrease " + f.label.toLowerCase());

    var inp = document.createElement("input");
    inp.type = "number";
    inp.id = "in_" + f.key;
    inp.min = String(LIMITS[f.key][0]);
    inp.max = String(LIMITS[f.key][1]);
    inp.step = "1";
    inp.value = String(LEN[f.key]);
    inp.setAttribute("inputmode", "numeric");

    var plus = document.createElement("button");
    plus.type = "button";
    plus.textContent = "+";
    plus.setAttribute("aria-label", "Increase " + f.label.toLowerCase());

    minus.addEventListener("click", function () { bump(f.key, -1); });
    plus.addEventListener("click", function () { bump(f.key, 1); });
    inp.addEventListener("input", function () {
      var raw = inp.value;
      if (raw === "") return;                     /* let them clear it mid-typing */
      setLen(f.key, clampInt(raw, LIMITS[f.key][0], LIMITS[f.key][1]), false);
    });
    inp.addEventListener("blur", function () {
      setLen(f.key, clampInt(inp.value, LIMITS[f.key][0], LIMITS[f.key][1]), true);
    });

    spin.appendChild(minus); spin.appendChild(inp); spin.appendChild(plus);
    row.appendChild(lab); row.appendChild(spin);
    fieldsEl.appendChild(row);
    inputs[f.key] = inp;
  });

  function bump(key, d) {
    setLen(key, clampInt(LEN[key] + d, LIMITS[key][0], LIMITS[key][1]), true);
  }
  /* A length change must never *complete* the stretch you are in. If the new
     length is already behind the time served, the stretch restarts on the new
     clock — otherwise the very next tick would bank a session and ring the
     chime just because you retyped a number. */
  function reflowStretch(announce) {
    if (st.elapsed < totalMs()) return;
    st.elapsed = 0;
    st.startedAt = performance.now();
    if (announce && st.running) {
      say("shorter than the time already served — this stretch restarts at " +
          Math.round(totalMs() / 60000) + " min", false);
    }
  }
  function setLen(key, val, writeBack) {
    if (LEN[key] === val && !writeBack) return;
    LEN[key] = val;
    if (writeBack) inputs[key].value = String(val);
    if (key === "perSet" && st.inSet > val) st.inSet = val;
    reflowStretch(true);
    render();
  }

  var PRESETS = [
    { name: "Classic", focus: 25, rest: 5, longRest: 15, perSet: 4 },
    { name: "Deep", focus: 50, rest: 10, longRest: 20, perSet: 2 },
    { name: "Quick", focus: 15, rest: 3, longRest: 12, perSet: 4 }
  ];
  PRESETS.forEach(function (p) {
    var b = document.createElement("button");
    b.type = "button";
    b.className = "btn preset";
    b.setAttribute("aria-pressed", "false");
    b.innerHTML = "";
    b.appendChild(document.createTextNode(p.name + " "));
    var n = document.createElement("span");
    n.className = "n";
    n.textContent = p.focus + "/" + p.rest;
    b.appendChild(n);
    b.addEventListener("click", function () {
      ["focus", "rest", "longRest", "perSet"].forEach(function (k) {
        LEN[k] = p[k];
        inputs[k].value = String(p[k]);
      });
      if (!st.running) st.elapsed = 0;
      if (st.inSet > LEN.perSet) st.inSet = LEN.perSet;
      reflowStretch(false);
      say(p.name.toLowerCase() + " lengths: " + p.focus + " min focus, " + p.rest + " min rest", false);
      render();
    });
    presetsEl.appendChild(b);
  });

  /* ---------- transport ---------- */
  /* returns true when it actually wiped the seeded state, so callers can say so */
  function clearSample() {
    if (!st.sample) return false;
    st.sample = false;
    st.log = [];
    st.done = 0;
    st.inSet = 0;
    st.focusedMs = 0;
    st.elapsed = 0;
    st.phase = "focus";
    return true;
  }

  function start() {
    if (st.running) return;
    var cleared = clearSample();
    audio();                                  /* unlock inside the click/key gesture */
    st.running = true;
    st.startedAt = performance.now() - st.elapsed;
    loop();
    say((cleared ? "sample cleared · " : "") +
        phaseName(st.phase).toLowerCase() + " running · ends " + clockAt(totalMs() - st.elapsed), false);
    render();
  }
  function pause() {
    if (!st.running) return;
    st.running = false;
    st.elapsed = performance.now() - st.startedAt;
    stopLoop();
    say("paused at " + mmss(totalMs() - st.elapsed) + " left", false);
    render();
  }
  function toggle() { st.running ? pause() : start(); }

  function reset() {
    var wasSample = st.sample;
    clearSample();
    st.running = false;
    stopLoop();
    st.elapsed = 0;
    st.phase = "focus";
    st.inSet = 0;
    say(wasSample ? "sample cleared — clean slate, " + LEN.focus + " min on the clock"
                  : "reset to a fresh " + LEN.focus + " min focus stretch", false);
    render();
  }

  function skip() {
    advance(false, clearSample() ? "sample cleared" : "");
  }

  function advance(natural, note) {
    var finished = st.phase;
    var mins = Math.round(totalMs() / 60000);
    var pre = note ? note + " · " : "";

    if (finished === "focus") {
      if (natural) {
        st.done++;
        st.inSet++;
        st.focusedMs += totalMs();
        st.log.unshift({ label: "Focus", min: mins, at: Date.now(), sample: false });
        if (st.log.length > 8) st.log.pop();
      }
      st.phase = (st.inSet >= LEN.perSet) ? "longRest" : "rest";
    } else {
      if (finished === "longRest") st.inSet = 0;
      st.phase = "focus";
    }

    st.elapsed = 0;
    st.startedAt = performance.now();

    if (natural) {
      chime(finished === "focus" ? "focus" : "rest");
      if (finished === "focus") {
        say(pre + "focus stretch done · " + mins + " min banked · " + phaseName(st.phase).toLowerCase() + " next", true);
      } else {
        say(pre + "rest over · back to " + LEN.focus + " min of focus", false);
      }
    } else {
      say(pre + "skipped to " + phaseName(st.phase).toLowerCase() + (finished === "focus" ? " — that stretch was not counted" : ""), false);
    }
    render();
  }

  /* ---------- clock loop ---------- */
  var raf = 0;
  function tick() {
    if (!st.running) return;
    st.elapsed = performance.now() - st.startedAt;
    var total = totalMs();
    if (st.elapsed >= total) {
      st.elapsed = total;
      renderClock();
      advance(true);
      return;
    }
    renderClock();
  }
  function frame() {
    tick();
    if (st.running) raf = requestAnimationFrame(frame);
  }
  function loop() {
    if (raf) cancelAnimationFrame(raf);
    raf = requestAnimationFrame(frame);
  }
  function stopLoop() {
    if (raf) cancelAnimationFrame(raf);
    raf = 0;
  }
  /* rAF gets throttled in a hidden tab; this keeps the flip honest either way */
  setInterval(function () { if (st.running) tick(); }, 1000);
  document.addEventListener("visibilitychange", function () {
    if (!document.hidden && st.running) { tick(); loop(); }
  });

  /* ---------- status line ---------- */
  var statusTimer = 0;
  function say(text, good) {
    statusEl.textContent = text;
    statusEl.className = "status" + (good ? " good" : "");
    if (statusTimer) clearTimeout(statusTimer);
    if (good) {
      statusTimer = setTimeout(function () {
        statusEl.className = "status";
      }, 6000);
    }
  }

  /* ---------- render ---------- */
  var ICO_PLAY = '<svg class="ico" viewBox="0 0 24 24" aria-hidden="true"><path d="M8 5.5v13l11-6.5-11-6.5z" fill="currentColor"/></svg>';
  var ICO_PAUSE = '<svg class="ico" viewBox="0 0 24 24" aria-hidden="true"><rect x="7" y="5.5" width="3.6" height="13" rx="1.1" fill="currentColor"/><rect x="13.4" y="5.5" width="3.6" height="13" rx="1.1" fill="currentColor"/></svg>';
  var SPEAKER_ON = '<svg class="ico" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M4 9.5h3.5L12 5.5v13L7.5 14.5H4z" fill="currentColor" stroke="none"/><path d="M15.5 9.2a4 4 0 0 1 0 5.6"/><path d="M18.2 6.6a7.6 7.6 0 0 1 0 10.8"/></svg>';
  var SPEAKER_OFF = '<svg class="ico" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" aria-hidden="true"><path d="M4 9.5h3.5L12 5.5v13L7.5 14.5H4z" fill="currentColor" stroke="none"/><path d="M16 9.5l5 5M21 9.5l-5 5"/></svg>';
  soundIco.innerHTML = SPEAKER_ON;
  startIco.innerHTML = ICO_PLAY;

  progArc.setAttribute("stroke-dasharray", C.toFixed(2));
  glowArc.setAttribute("stroke-dasharray", C.toFixed(2));

  var lastClock = "";          /* mm:ss last painted — text work is once a second */
  var lastRunning = null;      /* so the play/pause glyph is only re-parsed on change */

  /* every frame: ring geometry, plus the digits when the second actually rolls */
  function renderClock() {
    var total = totalMs();
    var left = Math.max(0, total - st.elapsed);
    var remain = total > 0 ? left / total : 0;
    var off = C * (1 - remain);
    progArc.setAttribute("stroke-dashoffset", off.toFixed(2));
    glowArc.setAttribute("stroke-dashoffset", off.toFixed(2));
    headG.setAttribute("transform", "rotate(" + (-90 + 360 * remain).toFixed(2) + " 140 140)");

    var t = mmss(left);
    if (t === lastClock) return;
    lastClock = t;
    timeLabel.textContent = t;
    if (st.running) subLabel.textContent = "ends " + clockAt(left);
    ringBtn.setAttribute("aria-label",
      (st.running ? "Pause" : "Start") + " the timer. " + phaseName(st.phase) + ", " + t + " left.");
    startBtn.setAttribute("aria-label", startText.textContent + " the timer, " + t + " left");
  }

  /* only on real state changes: phase, counters, settings, log */
  function renderChrome() {
    var total = totalMs();
    var left = Math.max(0, total - st.elapsed);
    var isFocus = st.phase === "focus";

    progArc.setAttribute("class", "prog " + (isFocus ? "focus" : "rest"));
    hero.setAttribute("data-phase", isFocus ? "focus" : "rest");
    ringBtn.className = "ringbtn" + (st.running ? " running" : "");

    /* centre */
    phaseLabel.textContent = phaseName(st.phase);
    if (!st.running) {
      subLabel.textContent = st.sample
        ? "sample · press space"
        : "paused · " + Math.round(total / 60000) + " min stretch";
    }

    /* dots */
    var want = LEN.perSet;
    while (dotsEl.children.length > want) dotsEl.removeChild(dotsEl.lastChild);
    while (dotsEl.children.length < want) {
      var d = document.createElement("span");
      d.className = "dot";
      dotsEl.appendChild(d);
    }
    for (var i = 0; i < want; i++) {
      var cls = "dot";
      if (i < st.inSet) cls += " done";
      else if (i === st.inSet && isFocus) cls += " now";
      dotsEl.children[i].className = cls;
    }
    dotsEl.setAttribute("aria-label", st.inSet + " of " + want + " focus stretches done before the long rest");

    /* transport */
    startText.textContent = st.running ? "Pause" : (st.elapsed > 0 && !st.sample ? "Resume" : "Start");
    if (lastRunning !== st.running) {
      startIco.innerHTML = st.running ? ICO_PAUSE : ICO_PLAY;
      lastRunning = st.running;
    }
    ringBtn.setAttribute("aria-label",
      (st.running ? "Pause" : "Start") + " the timer. " + phaseName(st.phase) + ", " + mmss(left) + " left.");
    startBtn.setAttribute("aria-label", startText.textContent + " the timer, " + mmss(left) + " left");

    /* stats */
    statSessions.textContent = String(st.done);
    statTime.textContent = st.focusedMs ? human(st.focusedMs) : "0m";
    var nextRest = (isFocus && st.inSet + 1 >= LEN.perSet) ? LEN.longRest : LEN.rest;
    statNext.textContent = isFocus ? nextRest + "m" : "now";
    setLabel.textContent = st.inSet + "/" + LEN.perSet + " to long rest";
    cycleSum.textContent = LEN.focus + " / " + LEN.rest + " / " + LEN.longRest;

    /* presets */
    for (var p = 0; p < PRESETS.length; p++) {
      var pr = PRESETS[p];
      var on = pr.focus === LEN.focus && pr.rest === LEN.rest && pr.longRest === LEN.longRest && pr.perSet === LEN.perSet;
      presetsEl.children[p].setAttribute("aria-pressed", on ? "true" : "false");
    }

    /* sample chip */
    sampleChip.hidden = !st.sample;

    /* log */
    logEl.textContent = "";
    for (var j = 0; j < st.log.length; j++) {
      var e = st.log[j];
      var li = document.createElement("li");
      if (e.sample) li.className = "sample";
      var mk = document.createElement("span");
      mk.className = "mark";
      var wh = document.createElement("span");
      wh.className = "what";
      wh.textContent = e.label + (e.sample ? " (sample)" : "");
      var ln = document.createElement("span");
      ln.className = "len";
      ln.textContent = e.min + "m";
      var wn = document.createElement("span");
      wn.className = "when";
      wn.textContent = clockOf(e.at);
      li.appendChild(mk); li.appendChild(wn); li.appendChild(wh); li.appendChild(ln);
      logEl.appendChild(li);
    }
    logEmpty.hidden = st.log.length > 0;
    logCount.textContent = st.log.length ? st.log.length + " logged" : "none yet";

    lastClock = "";        /* phase/length may have moved — let the digits repaint */
  }

  function render() { renderChrome(); renderClock(); }

  /* ---------- wiring ---------- */
  startBtn.addEventListener("click", toggle);
  ringBtn.addEventListener("click", toggle);
  skipBtn.addEventListener("click", skip);
  resetBtn.addEventListener("click", reset);
  soundBtn.addEventListener("click", function () {
    st.muted = !st.muted;
    soundBtn.setAttribute("aria-pressed", st.muted ? "false" : "true");
    soundText.textContent = st.muted ? "Chime off" : "Chime on";
    soundIco.innerHTML = st.muted ? SPEAKER_OFF : SPEAKER_ON;
    soundBtn.setAttribute("aria-label", st.muted ? "Chime is off. Turn it on." : "Chime is on. Turn it off.");
    soundBtn.className = "btn" + (st.muted ? " hushed" : "");
    if (!st.muted) {
      say(chime("rest")
        ? "chime on — that is what you will hear"
        : "this browser gives us no web audio — the timer still flips on its own, silently", false);
    } else {
      say("chime off", false);
    }
  });

  document.addEventListener("keydown", function (ev) {
    if (ev.metaKey || ev.ctrlKey || ev.altKey || ev.repeat) return;
    var t = ev.target, tag = t && t.tagName ? t.tagName.toLowerCase() : "";
    var typing = tag === "input" || tag === "textarea" || tag === "select" || (t && t.isContentEditable);
    var onButton = tag === "button";
    var k = ev.key;
    if (k === " " || k === "Spacebar") {
      if (typing || onButton) return;            /* let the focused control have it */
      ev.preventDefault();
      toggle();
      return;
    }
    if (typing) return;
    if (k === "s" || k === "S") { ev.preventDefault(); skip(); }
    else if (k === "r" || k === "R") { ev.preventDefault(); reset(); }
    else if (k === "m" || k === "M") { ev.preventDefault(); soundBtn.click(); }
  });

  /* ---------- go ---------- */
  say("sample state: a fourth focus stretch, paused with 16:30 left — press space to clear it and run a real 25 min", false);
  render();
})();
</script>
</body>
</html>