(function () {
  'use strict';

  // ---------- state ----------
  var state = {
    phase: 'intro',      // intro | test | results
    probes: [],          // the 35 drawn scenarios
    items: [],           // 50-item interleaved sequence: {type:'scenario'|'word', ...}
    itemAnswers: [],      // ratings for the 50 items, index-aligned with items
    answers: [],          // derived scenario-only ratings (for compute/interpret/breakdown)
    currentQ: 0,
    cardVisible: true,
    theme: 'paper',
    poolSize: 0,
    nonce: null,
    profile: null,
    interp: null,
    wordGaps: null,
    barsReady: false
  };
  var pool = null;
  var poolTries = 0;
  var drag = false;
  var timers = { t1: null, t2: null, tf: null, tb: null };

  // ---------- dom ----------
  var root = document.getElementById('app-root');
  var el = {
    themeToggle: document.getElementById('theme-toggle'),
    phaseIntro: document.getElementById('phase-intro'),
    phaseTest: document.getElementById('phase-test'),
    phaseResults: document.getElementById('phase-results'),
    introGradient: document.getElementById('intro-gradient'),
    poolLine: document.getElementById('pool-line'),
    beginBtn: document.getElementById('begin-btn'),
    progressFill: document.getElementById('progress-fill'),
    progressText: document.getElementById('progress-text'),
    qIndex: document.getElementById('q-index'),
    wordPrompt: document.getElementById('word-prompt'),
    probeText: document.getElementById('probe-text'),
    valueDisplay: document.getElementById('value-display'),
    valueWord: document.getElementById('value-word'),
    rail: document.getElementById('rail'),
    railGradient: document.getElementById('rail-gradient'),
    railTicks: document.getElementById('rail-ticks'),
    railThumb: document.getElementById('rail-thumb'),
    card: document.getElementById('question-card'),
    prevBtn: document.getElementById('prev-btn'),
    nextBtn: document.getElementById('next-btn'),
    headlineCard: document.getElementById('headline-card'),
    headlineTitle: document.getElementById('headline-title'),
    headlineBody: document.getElementById('headline-body'),
    dimRows: document.getElementById('dim-rows'),
    insightList: document.getElementById('insight-list'),
    tierPanel: document.getElementById('tier-panel'),
    tierRead: document.getElementById('tier-read'),
    callbackPanel: document.getElementById('callback-panel'),
    callbackList: document.getElementById('callback-list'),
    wordgapPanel: document.getElementById('wordgap-panel'),
    wordgapList: document.getElementById('wordgap-list'),
    breakdownList: document.getElementById('breakdown-list'),
    restartBtn: document.getElementById('restart-btn')
  };

  // ---------- constants ----------
  var SCALE_MAP = { '-6':0,'-5':0,'-4':51,'-3':102,'-2':128,'-1':140,'0':153,'1':166,'2':179,'3':204,'4':230,'5':255,'6':255 };
  var WORDS = ['Hits hard','Hits hard','Hits hard','Stings','Stings','Eases off','Doesn’t affect me','Lifts a little','Feels good','Feels good','Feels great','Feels great','Feels great'];
  var DIM_META = [
    { key:'V', name:'Valence', lo:'negative bias', hi:'positive bias' },
    { key:'A', name:'Arousal', lo:'calm / flat', hi:'reactive' },
    { key:'D', name:'Dominance', lo:'powerless', hi:'in control' },
    { key:'U', name:'Urgency', lo:'no pressure', hi:'everything urgent' },
    { key:'G', name:'Gravity', lo:'feels heavy', hi:'feels light' },
    { key:'W', name:'Self-Worth', lo:'self-critical', hi:'self-assured' },
    { key:'I', name:'Intent', lo:'withdrawing', hi:'connecting' }
  ];
  var TIER_META = [
    { key:'N',   name:'Every scene was neutral',     desc:'Each one was written to be ambiguous — the meaning came from you. This is what you projected onto blank situations.' }
  ];

  // ---------- palette / color ----------
  function pal() {
    if (state.theme === 'dusk') return {
      clay:[220,114,83], sand:[150,139,118], green:[98,179,129],
      dims:{ V:'#6E9BD6', A:'#DB8154', D:'#A98AD2', U:'#DC6F5E', G:'#DFB35F', W:'#62BB8E', I:'#CDA552' },
      rate:{ low:'#DC7253', high:'#62B381', mid:'#8E8369' },
      ins:{ warn:'#D78B57', good:'#62B381', neutral:'#AC9F87' },
      tier:{ N:'#B79BCB', NEG:'#DC7253', POS:'#62B381' }
    };
    return {
      clay:[154,59,37], sand:[199,183,155], green:[47,107,69],
      dims:{ V:'#3F6FB0', A:'#C0623A', D:'#7A5BA6', U:'#B0453A', G:'#C2913E', W:'#3E8A6B', I:'#A8832F' },
      rate:{ low:'#9A3B25', high:'#2F6B45', mid:'#A89B85' },
      ins:{ warn:'#B26A3A', good:'#3E8A6B', neutral:'#9A8E79' },
      tier:{ N:'#8A6B9E', NEG:'#B0453A', POS:'#3E8A6B' }
    };
  }
  function colorFor(v) {
    var p = pal();
    if (v === null || v === undefined) { var s = p.sand; return 'rgb(' + s[0] + ',' + s[1] + ',' + s[2] + ')'; }
    var a, b, t;
    if (v <= 0) { a = p.clay; b = p.sand; t = (v + 6) / 6; } else { a = p.sand; b = p.green; t = v / 6; }
    var c = a.map(function (x, i) { return Math.round(x + (b[i] - x) * t); });
    return 'rgb(' + c[0] + ',' + c[1] + ',' + c[2] + ')';
  }
  function gradientCss() {
    return 'linear-gradient(90deg,' + colorFor(-6) + ',' + colorFor(0) + ' 50%,' + colorFor(6) + ')';
  }

  // ---------- theme ----------
  function applyBodyBg(t) {
    try {
      var c = t === 'dusk' ? '#100E09' : '#ECE4D4';
      document.body.style.background = c;
      document.documentElement.style.background = c;
    } catch (_) {}
  }
  function setTheme(t) {
    state.theme = t;
    root.setAttribute('data-theme', t);
    el.themeToggle.innerHTML = t === 'dusk' ? '☀' : '☾';
    applyBodyBg(t);
    refreshGradients();
    if (state.phase === 'test') renderTest();
    if (state.phase === 'results') renderResults();
  }
  function toggleTheme() { setTheme(state.theme === 'dusk' ? 'paper' : 'dusk'); }

  function refreshGradients() {
    var g = gradientCss();
    el.introGradient.style.background = g;
    el.railGradient.style.background = g;
    el.progressFill.style.background = g;
  }

  // ---------- probe selection (ported from rtr_logic.js) ----------
  function shuffle(arr) {
    for (var i = arr.length - 1; i > 0; i--) {
      var j = Math.floor(Math.random() * (i + 1));
      var t = arr[i]; arr[i] = arr[j]; arr[j] = t;
    }
    return arr;
  }
  function selectProbes(p) {
    var cats = ['V','A','D','U','G','W','I'], tiers = ['N','NEG','POS'], groups = {};
    for (var ci = 0; ci < cats.length; ci++) for (var ti = 0; ti < tiers.length; ti++) groups[cats[ci] + '_' + tiers[ti]] = [];
    for (var i = 0; i < p.length; i++) { var k = p[i].cat + '_' + p[i].tier; if (groups[k]) groups[k].push(p[i]); }
    for (var key in groups) shuffle(groups[key]);
    var selected = [];
    for (var c2 = 0; c2 < cats.length; c2++) {
      var c = cats[c2], catProbes = [];
      var nArr = groups[c + '_N'], negArr = groups[c + '_NEG'], posArr = groups[c + '_POS'];
      if (nArr.length) catProbes.push(nArr.pop());
      if (negArr.length) catProbes.push(negArr.pop());
      if (posArr.length) catProbes.push(posArr.pop());
      var remaining = [];
      for (var j = 0; j < nArr.length; j++) remaining.push(nArr[j]);
      for (var j2 = 0; j2 < negArr.length; j2++) remaining.push(negArr[j2]);
      for (var j3 = 0; j3 < posArr.length; j3++) remaining.push(posArr[j3]);
      shuffle(remaining);
      var need = 5 - catProbes.length;
      for (var j4 = 0; j4 < need && j4 < remaining.length; j4++) catProbes.push(remaining[j4]);
      for (var j5 = 0; j5 < catProbes.length; j5++) selected.push(catProbes[j5]);
    }
    shuffle(selected);
    return selected;
  }

  // ---------- words fetch + 50-item sequence ----------
  function fetchWords() {
    // fail-soft: any error or empty -> resolve to [] (just the 35 scenarios)
    return fetch('/api/words?n=15', { headers: { 'Accept': 'application/json' } })
      .then(function (r) { return r.ok ? r.json() : null; })
      .then(function (j) {
        var ws = (j && Array.isArray(j.words)) ? j.words : [];
        return ws.filter(function (w) { return w && w.word; }).slice(0, 15);
      })
      .catch(function () { return []; });
  }
  // Build a single 50-item sequence (35 scenarios + up to 15 words),
  // interleaved so it doesn't feel like two blocks.
  function buildSequence(scenarios, words) {
    var items = [];
    for (var i = 0; i < scenarios.length; i++) {
      items.push({ type: 'scenario', probe: scenarios[i] });
    }
    for (var j = 0; j < words.length; j++) {
      items.push({ type: 'word', word: words[j] });
    }
    shuffle(items);
    return items;
  }
  function scenarioProbes() {
    var out = [];
    for (var i = 0; i < state.items.length; i++) {
      if (state.items[i].type === 'scenario') out.push(state.items[i].probe);
    }
    return out;
  }
  function scenarioAnswers() {
    var out = [];
    for (var i = 0; i < state.items.length; i++) {
      if (state.items[i].type === 'scenario') out.push(state.itemAnswers[i]);
    }
    return out;
  }

  // ---------- pool load (retry, like original _loadPool) ----------
  function loadPool() {
    var p = (typeof window !== 'undefined' && window.RTR_POOL) ? window.RTR_POOL : null;
    if (p && p.length) {
      pool = p;
      state.probes = selectProbes(pool);
      state.poolSize = pool.length;
      el.poolLine.textContent = '50 questions — ' + state.probes.length + ' situations drawn from ' + state.poolSize + ', plus words — every run differs';
    } else {
      poolTries += 1;
      if (poolTries < 120) setTimeout(loadPool, 40);
    }
  }

  // ---------- flow ----------
  function clearTimers() {
    clearTimeout(timers.t1); clearTimeout(timers.t2);
    clearTimeout(timers.tf); clearTimeout(timers.tb);
  }
  function showPhase(phase) {
    state.phase = phase;
    el.phaseIntro.hidden = phase !== 'intro';
    el.phaseTest.hidden = phase !== 'test';
    el.phaseResults.hidden = phase !== 'results';
  }
  function begin() {
    if (!state.probes.length) return;
    el.beginBtn.disabled = true;
    fetchWords().then(function (words) {
      // fail-soft: words may be [] (then sequence is just the 35 scenarios)
      state.items = buildSequence(state.probes, words);
      state.itemAnswers = new Array(state.items.length).fill(null);
      state.nonce = newNonce();
      state.currentQ = 0;
      state.cardVisible = true;
      el.card.classList.remove('rtr-hidden');
      el.beginBtn.disabled = false;
      showPhase('test');
      renderTest();
    });
  }
  function newNonce() {
    try {
      if (window.crypto && typeof window.crypto.randomUUID === 'function') return window.crypto.randomUUID();
    } catch (_) {}
    return 'n-' + Date.now() + '-' + Math.random().toString(16).slice(2);
  }
  function setProvisional(value) {
    state.itemAnswers[state.currentQ] = value;
    renderTest();
  }
  function valueFromEvent(e) {
    var r = el.rail.getBoundingClientRect();
    var ratio = (e.clientX - r.left) / r.width;
    ratio = Math.max(0, Math.min(1, ratio));
    return Math.round(ratio * 12) - 6;
  }
  function railDown(e) {
    drag = true;
    try { el.rail.setPointerCapture(e.pointerId); } catch (_) {}
    setProvisional(valueFromEvent(e));
  }
  function railMove(e) { if (drag) setProvisional(valueFromEvent(e)); }
  function railUp() {
    if (!drag) return;
    drag = false;
    if (state.itemAnswers[state.currentQ] === null) return;
    scheduleAdvance();
  }
  function railKey(e) {
    var cur = state.itemAnswers[state.currentQ];
    if (cur === null) cur = 0;
    if (e.key === 'ArrowLeft' || e.key === 'ArrowDown') { e.preventDefault(); setProvisional(Math.max(-6, cur - 1)); }
    else if (e.key === 'ArrowRight' || e.key === 'ArrowUp') { e.preventDefault(); setProvisional(Math.min(6, cur + 1)); }
    else if (e.key === 'Enter') { if (state.itemAnswers[state.currentQ] !== null) next(); }
  }
  function scheduleAdvance() {
    clearTimers();
    timers.t1 = setTimeout(function () {
      state.cardVisible = false;
      el.card.classList.add('rtr-hidden');
      timers.t2 = setTimeout(function () {
        var nx = state.currentQ + 1;
        if (nx < state.items.length) {
          state.currentQ = nx; state.cardVisible = true;
          el.card.classList.remove('rtr-hidden');
          renderTest();
        } else { goToResults(); }
      }, 260);
    }, 300);
  }
  function fadeTo(idx) {
    clearTimers();
    state.cardVisible = false;
    el.card.classList.add('rtr-hidden');
    timers.tf = setTimeout(function () {
      state.currentQ = idx; state.cardVisible = true;
      el.card.classList.remove('rtr-hidden');
      renderTest();
    }, 260);
  }
  function next() {
    if (state.itemAnswers[state.currentQ] === null) return;
    var nx = state.currentQ + 1;
    if (nx < state.items.length) fadeTo(nx);
    else goToResults();
  }
  function prev() { if (state.currentQ > 0) fadeTo(state.currentQ - 1); }

  function goToResults() {
    clearTimers();
    // Scenario answers feed the 7-D profile EXACTLY as before; word answers do not.
    state.probes = scenarioProbes();
    state.answers = scenarioAnswers();
    state.profile = window.RTR_COMPUTE.computeProfile(state.probes, state.answers);
    state.interp = window.RTR_INTERPRET.interpret(state.profile, state.probes, state.answers);
    state.wordGaps = null;
    state.barsReady = false;
    showPhase('results');
    renderResults();
    try { window.scrollTo(0, 0); } catch (_) {}
    timers.tb = setTimeout(function () { state.barsReady = true; renderDimRows(); }, 220);
    submitRun();
  }
  function submitRun() {
    var scenarios = [];
    var words = [];
    for (var i = 0; i < state.items.length; i++) {
      var it = state.items[i], rating = state.itemAnswers[i];
      if (rating === null) continue;
      if (it.type === 'scenario') {
        scenarios.push({ id: it.probe.id, cat: it.probe.cat, tier: it.probe.tier, rating: rating });
      } else {
        words.push({ id: it.word.id, word: it.word.word, source: it.word.source, rating: rating });
      }
    }
    // fail-soft: if /api/submit errors, results stay; just no word-gap section.
    fetch('/api/submit', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ nonce: state.nonce, scenarios: scenarios, words: words })
    })
      .then(function (r) { return r.ok ? r.json() : null; })
      .then(function (j) {
        var gaps = (j && Array.isArray(j.wordGaps)) ? j.wordGaps : null;
        if (state.phase !== 'results') return;
        state.wordGaps = gaps;
        renderWordGaps();
      })
      .catch(function () { /* fail-soft: leave word-gap section hidden */ });
  }
  function restart() {
    clearTimers();
    state.probes = selectProbes(pool || []);
    state.items = [];
    state.itemAnswers = [];
    state.answers = [];
    state.nonce = null;
    state.currentQ = 0;
    state.profile = null;
    state.interp = null;
    state.wordGaps = null;
    state.barsReady = false;
    state.cardVisible = true;
    el.card.classList.remove('rtr-hidden');
    showPhase('intro');
    try { window.scrollTo(0, 0); } catch (_) {}
  }

  // ---------- render: test ----------
  function pad(n) { return (n < 10 ? '0' : '') + n; }
  function buildTicks() {
    el.railTicks.innerHTML = '';
    for (var i = 0; i < 13; i++) {
      var d = document.createElement('div');
      d.className = 'rtr-tick';
      d.style.left = (i / 12 * 100) + '%';
      el.railTicks.appendChild(d);
    }
  }
  function renderTest() {
    var items = state.items, idx = state.currentQ, total = items.length;
    var item = items[idx];
    var cur = state.itemAnswers[idx];
    var done = state.itemAnswers.filter(function (a) { return a !== null; }).length;
    var hasVal = cur !== null;
    var dusk = state.theme === 'dusk';

    var isWord = item && item.type === 'word';
    if (isWord) {
      el.qIndex.textContent = 'Word ' + pad(idx + 1) + ' / ' + total;
      el.wordPrompt.hidden = false;
      el.wordPrompt.textContent = 'How does this word feel?';
      el.probeText.className = 'rtr-probe-text rtr-is-word';
      el.probeText.textContent = item.word.word;
    } else {
      el.qIndex.textContent = 'Situation ' + pad(idx + 1) + ' / ' + total;
      el.wordPrompt.hidden = true;
      el.probeText.className = 'rtr-probe-text';
      el.probeText.textContent = '“' + (item && item.probe ? item.probe.text : '') + '”';
    }
    el.progressFill.style.width = (done / total * 100) + '%';
    el.progressText.textContent = done + ' / ' + total;

    el.valueDisplay.textContent = hasVal ? ((cur > 0 ? '+' : '') + cur) : '–';
    el.valueDisplay.style.color = colorFor(cur);
    el.valueWord.textContent = hasVal ? WORDS[cur + 6] : 'Drag or tap the line';

    // thumb
    if (hasVal) {
      el.railThumb.className = 'rtr-rail-thumb has-value';
      el.railThumb.style.left = ((((cur) + 6) / 12) * 100) + '%';
      el.railThumb.style.borderColor = colorFor(cur);
    } else {
      el.railThumb.className = 'rtr-rail-thumb no-value';
      el.railThumb.style.left = '50%';
      el.railThumb.style.borderColor = '';
    }

    // prev
    el.prevBtn.disabled = idx === 0;
    el.prevBtn.style.color = idx === 0
      ? (dusk ? '#544B3B' : '#CFC4B0')
      : (dusk ? '#AC9F87' : '#8C806C');

    // next
    var last = idx === total - 1;
    el.nextBtn.disabled = !hasVal;
    el.nextBtn.textContent = last ? 'See results →' : 'Next →';
    if (hasVal) {
      el.nextBtn.style.background = dusk ? '#F2EAD9' : '#241F18';
      el.nextBtn.style.borderColor = dusk ? '#F2EAD9' : '#241F18';
      el.nextBtn.style.color = dusk ? '#1A160F' : '#F4EEE2';
    } else {
      el.nextBtn.style.background = 'transparent';
      el.nextBtn.style.borderColor = dusk ? '#322C20' : '#D8CDB8';
      el.nextBtn.style.color = dusk ? '#544B3B' : '#C4B89F';
    }
  }

  // ---------- render: results ----------
  function insAccent(kind) {
    var p = pal();
    return kind === 'warn' ? p.ins.warn : kind === 'good' ? p.ins.good : p.ins.neutral;
  }
  function renderDimRows() {
    var pf = state.profile, p = pal(), dims = (state.interp && state.interp.dimensions) || [];
    var byKey = {};
    for (var i = 0; i < dims.length; i++) byKey[dims[i].key] = dims[i];
    el.dimRows.innerHTML = '';
    DIM_META.forEach(function (d, di) {
      var idim = byKey[d.key] || {};
      var val = (typeof idim.score === 'number') ? idim.score : pf[d.key];
      var mid = 128, color = p.dims[d.key];
      var span = Math.abs(val - mid) / mid;
      var half = (state.barsReady ? span : 0) * 50;
      var right = val >= mid;
      var reading = idim.reading || getReading(val, d.lo, d.hi);
      var line = idim.line || '';

      var row = document.createElement('div');
      row.className = 'rtr-dim-row';

      var head = document.createElement('div');
      head.className = 'rtr-dim-head';
      var nm = document.createElement('span');
      nm.className = 'rtr-dim-name'; nm.textContent = idim.name || d.name;
      var rd = document.createElement('span');
      rd.className = 'rtr-dim-reading'; rd.style.color = color; rd.textContent = reading;
      head.appendChild(nm); head.appendChild(rd);

      var track = document.createElement('div');
      track.className = 'rtr-dim-track';
      var center = document.createElement('div'); center.className = 'rtr-dim-center';
      var fill = document.createElement('div');
      fill.className = 'rtr-dim-fill';
      fill.style.left = right ? '50%' : (50 - half) + '%';
      fill.style.width = half + '%';
      fill.style.background = color;
      fill.style.borderRadius = right ? '0 7px 7px 0' : '7px 0 0 7px';
      fill.style.transitionDelay = (di * 0.07) + 's';
      track.appendChild(center); track.appendChild(fill);

      var foot = document.createElement('div');
      foot.className = 'rtr-dim-foot';
      var lo = document.createElement('span'); lo.textContent = d.lo;
      var hi = document.createElement('span'); hi.textContent = d.hi;
      foot.appendChild(lo); foot.appendChild(hi);

      row.appendChild(head); row.appendChild(track); row.appendChild(foot);
      if (line) {
        var ln = document.createElement('p');
        ln.className = 'rtr-dim-line'; ln.textContent = line;
        row.appendChild(ln);
      }
      el.dimRows.appendChild(row);
    });
  }
  function getReading(val, lo, hi) {
    if (val < 80) return lo;
    if (val < 118) return 'slightly ' + lo;
    if (val > 180) return hi;
    if (val > 138) return 'slightly ' + hi;
    return 'balanced';
  }
  function renderHeadline() {
    var h = state.interp && state.interp.headline;
    if (h && (h.title || h.body)) {
      el.headlineCard.hidden = false;
      el.headlineTitle.textContent = h.title || '';
      el.headlineBody.textContent = h.body || '';
      el.headlineCard.style.borderLeftColor = 'var(--accent,#A8754E)';
    } else {
      el.headlineCard.hidden = true;
    }
  }
  function renderInsights() {
    var list = (state.interp && state.interp.insights) || [];
    el.insightList.innerHTML = '';
    if (!list.length) { el.insightList.parentElement.hidden = true; return; }
    el.insightList.parentElement.hidden = false;
    list.forEach(function (ins) {
      var d = document.createElement('div');
      d.className = 'rtr-insight';
      d.style.borderLeftColor = insAccent(ins.kind);
      var t = document.createElement('div');
      t.className = 'rtr-insight-title'; t.textContent = ins.title || '';
      var b = document.createElement('div');
      b.className = 'rtr-insight-body'; b.textContent = ins.body || '';
      d.appendChild(t); d.appendChild(b);
      el.insightList.appendChild(d);
    });
  }
  function renderTierRead() {
    var tr = state.interp && state.interp.tierRead;
    if (!tr) { el.tierPanel.hidden = true; return; }
    el.tierPanel.hidden = false;
    el.tierRead.innerHTML = '';
    var lines = [
      { label: 'Floor', text: tr.floorLine },
      { label: 'Ceiling', text: tr.ceilingLine },
      { label: 'Baseline', text: tr.baselineLine }
    ];
    lines.forEach(function (l) {
      if (!l.text) return;
      var row = document.createElement('div');
      row.className = 'rtr-tier-line';
      var lab = document.createElement('div');
      lab.className = 'rtr-tier-label'; lab.textContent = l.label;
      var txt = document.createElement('div');
      txt.className = 'rtr-tier-text'; txt.textContent = l.text;
      row.appendChild(lab); row.appendChild(txt);
      el.tierRead.appendChild(row);
    });
    if (tr.summary) {
      var s = document.createElement('div');
      s.className = 'rtr-tier-summary'; s.textContent = tr.summary;
      el.tierRead.appendChild(s);
    }
  }
  function renderCallbacks() {
    var list = (state.interp && state.interp.callbacks) || [];
    if (!list.length) { el.callbackPanel.hidden = true; return; }
    el.callbackPanel.hidden = false;
    el.callbackList.innerHTML = '';
    list.forEach(function (cb) {
      var d = document.createElement('div');
      d.className = 'rtr-callback';
      var head = document.createElement('div');
      head.className = 'rtr-callback-head';
      var txt = document.createElement('span');
      txt.className = 'rtr-callback-text';
      txt.textContent = '“' + (cb.text || '') + '”';
      var rate = document.createElement('span');
      rate.className = 'rtr-callback-rating';
      rate.textContent = cb.ratingStr || '';
      head.appendChild(txt); head.appendChild(rate);
      d.appendChild(head);
      if (cb.note) {
        var note = document.createElement('div');
        note.className = 'rtr-callback-note'; note.textContent = cb.note;
        d.appendChild(note);
      }
      el.callbackList.appendChild(d);
    });
  }
  function renderBreakdown() {
    var P = state.probes, A = state.answers, p = pal();
    el.breakdownList.innerHTML = '';
    TIER_META.forEach(function (td) {
      var grp = document.createElement('div');
      grp.className = 'rtr-grp';
      var name = document.createElement('div');
      name.className = 'rtr-grp-name'; name.style.color = p.tier[td.key]; name.textContent = td.name;
      var desc = document.createElement('p');
      desc.className = 'rtr-grp-desc'; desc.textContent = td.desc;
      grp.appendChild(name); grp.appendChild(desc);
      for (var pi = 0; pi < P.length; pi++) {
        if (P[pi].tier !== td.key) continue;
        var raw = A[pi];
        var rs = (raw > 0 ? '+' : '') + raw;
        var rc = raw <= -3 ? p.rate.low : raw >= 3 ? p.rate.high : p.rate.mid;
        var item = document.createElement('div');
        item.className = 'rtr-grp-item';
        var it = document.createElement('span');
        it.className = 'rtr-grp-item-text'; it.textContent = '“' + P[pi].text + '”';
        var ir = document.createElement('span');
        ir.className = 'rtr-grp-item-rating'; ir.style.color = rc; ir.textContent = rs;
        item.appendChild(it); item.appendChild(ir);
        grp.appendChild(item);
      }
      el.breakdownList.appendChild(grp);
    });
  }
  function renderWordGaps() {
    var list = state.wordGaps;
    if (!list || !list.length) { el.wordgapPanel.hidden = true; return; }
    el.wordgapPanel.hidden = false;
    el.wordgapList.innerHTML = '';
    var p = pal();
    list.forEach(function (wg) {
      var word = wg.word || '';
      var unknown = wg.source === 'unknown';
      var d = document.createElement('div');
      d.className = 'rtr-insight';
      var title = document.createElement('div');
      title.className = 'rtr-insight-title';
      title.textContent = '‘' + word + '’';
      var body = document.createElement('div');
      body.className = 'rtr-insight-body';
      if (unknown) {
        d.style.borderLeftColor = p.ins.neutral;
        body.textContent = wg.note || ('the engine didn’t know this; your rating helps teach it.');
      } else {
        var gap = (typeof wg.gap === 'number') ? wg.gap : null;
        d.style.borderLeftColor = gap === null ? p.ins.neutral : (gap < 0 ? p.ins.warn : p.ins.good);
        body.textContent = wg.note || ('you read it ' + (gap === null ? 'differently' : (gap < 0 ? 'colder' : 'warmer')) + ' than the language does');
      }
      d.appendChild(title); d.appendChild(body);
      el.wordgapList.appendChild(d);
    });
  }
  function renderResults() {
    renderHeadline();
    renderDimRows();
    renderInsights();
    renderTierRead();
    renderCallbacks();
    renderWordGaps();
    renderBreakdown();
  }

  // ---------- wire up ----------
  function init() {
    setTheme('paper');
    refreshGradients();
    buildTicks();

    el.themeToggle.addEventListener('click', toggleTheme);
    el.beginBtn.addEventListener('click', begin);
    el.restartBtn.addEventListener('click', restart);
    el.prevBtn.addEventListener('click', prev);
    el.nextBtn.addEventListener('click', next);

    el.rail.addEventListener('pointerdown', railDown);
    el.rail.addEventListener('pointermove', railMove);
    el.rail.addEventListener('pointerup', railUp);
    el.rail.addEventListener('keydown', railKey);

    loadPool();
  }

  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', init);
  } else {
    init();
  }
})();