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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
:root {
--bg: var(--color-background-tertiary, #F7F5F0);
--surface: var(--color-background-primary, #FFFFFF);
--border: var(--color-border-tertiary, #E2DDD6);
--text: var(--color-text-primary, #1A1714);
--muted: var(--color-text-secondary, #7A746C);
--accent: #2B5CE6;
--ok: #1A7A4A; --ok-bg: #E8F5EE;
--warn: #A05C00; --warn-bg: #FEF3E2;
--danger: #C0392B; --danger-bg: #FDECEB;
--radius: 12px; --radius-sm: 8px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-sans, sans-serif); background: var(--bg); color: var(--text); min-height: 100vh; padding: 2rem 1rem 4rem; }
.container { max-width: 900px; margin: 0 auto; }
.site-header { text-align: center; margin-bottom: 2.5rem; padding-top: 1rem; }
.site-header h1 { font-size: 2rem; font-weight: 500; letter-spacing: -0.02em; }
.site-header p { font-size: 0.95rem; color: var(--muted); margin-top: 0.4rem; line-height: 1.6; }
.progress-wrap { display: flex; align-items: center; gap: 12px; margin-bottom: 1.5rem; }
.progress-track { flex: 1; height: 4px; background: var(--border); border-radius: 2px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); border-radius: 2px; transition: width 0.4s ease; }
.progress-label { font-size: 13px; color: var(--muted); white-space: nowrap; }
.card { background: var(--surface); border: 0.5px solid var(--border); border-radius: var(--radius); padding: 1.75rem; margin-bottom: 1rem; }
.q-number { font-size: 12px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.6rem; }
.q-text { font-size: 1.15rem; font-weight: 500; line-height: 1.5; margin-bottom: 1.75rem; }
.sum-row { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; margin-top: 1.25rem; padding-top: 1.25rem; border-top: 0.5px solid var(--border); }
.sum-pill { font-size: 13px; font-weight: 500; padding: 5px 12px; border-radius: 20px; }
.sum-pill.ok { background: var(--ok-bg); color: var(--ok); }
.sum-pill.over { background: var(--danger-bg); color: var(--danger); }
.sum-pill.under { background: var(--warn-bg); color: var(--warn); }
.toggle-row { display: flex; align-items: center; gap: 8px; margin-bottom: 0.75rem; font-size: 14px; color: var(--muted); cursor: pointer; user-select: none; }
.toggle-row input[type=checkbox] { accent-color: var(--accent); width: 15px; height: 15px; cursor: pointer; flex-shrink: 0; }
.btn-row { display: flex; gap: 8px; }
.btn { padding: 7px 16px; border: 0.5px solid var(--border); border-radius: var(--radius-sm); font-size: 14px; cursor: pointer; background: transparent; color: var(--text); transition: background .15s; }
.btn:hover:not(:disabled) { background: var(--bg); }
.btn:disabled { opacity: .35; cursor: default; }
.btn-accent { padding: 9px 22px; background: var(--accent); color: #fff; border: none; border-radius: var(--radius-sm); font-size: 15px; font-weight: 500; cursor: pointer; transition: background .15s, transform .1s; }
.btn-accent:hover:not(:disabled) { background: #1a45c7; }
.btn-accent:active:not(:disabled) { transform: scale(.98); }
.btn-accent:disabled { opacity: .35; cursor: default; }
.nav-row { display: flex; justify-content: space-between; align-items: center; margin-top: 1rem; }
.step-dots { display: flex; gap: 6px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border); }
.dot.done { background: var(--accent); opacity: .4; }
.dot.current { background: var(--accent); }
.demo-badge { display: inline-block; font-size: 11px; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; background: var(--warn-bg); color: var(--warn); padding: 3px 9px; border-radius: 4px; margin-bottom: 0.6rem; }
.positive { color: var(--ok); }
.negative { color: var(--danger); }
.zero { color: var(--muted); }
.results-header { text-align: center; margin-bottom: 1.5rem; }
.results-header h2 { font-size: 1.6rem; font-weight: 500; }
.results-header p { font-size: 14px; color: var(--muted); margin-top: 4px; }
.score-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; margin-bottom: 1.5rem; }
.score-tile { background: var(--surface); border: 0.5px solid var(--border); border-radius: var(--radius); padding: 1.25rem; text-align: center; }
.score-tile .big { font-size: 2rem; font-weight: 500; }
.score-tile .label { font-size: 12px; color: var(--muted); margin-top: 4px; line-height: 1.4; }
.bar-container { margin: 0.5rem 0 1.75rem; }
.bar-axis { display: flex; justify-content: space-between; font-size: 11px; color: var(--muted); margin-bottom: 4px; }
.bar-track { position: relative; height: 8px; background: var(--border); border-radius: 4px; overflow: visible; }
.bar-neg { position: absolute; top: 0; height: 100%; background: var(--danger); border-radius: 4px 0 0 4px; transition: width .6s ease, left .6s ease; }
.bar-pos { position: absolute; top: 0; height: 100%; background: var(--ok); border-radius: 0 4px 4px 0; transition: width .6s ease, left .6s ease; }
.bar-zero { position: absolute; top: -3px; width: 2px; height: 14px; background: var(--muted); border-radius: 1px; }
.q-result { background: var(--surface); border: 0.5px solid var(--border); border-radius: var(--radius); padding: 1.25rem; margin-bottom: .75rem; }
.q-result-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: .75rem; }
.q-result-text { font-size: 14px; line-height: 1.5; flex: 1; }
.q-score-badge { font-size: 13px; font-weight: 500; padding: 3px 10px; border-radius: 20px; white-space: nowrap; flex-shrink: 0; }
.q-score-badge.high { background: var(--ok-bg); color: var(--ok); }
.q-score-badge.mid { background: var(--warn-bg); color: var(--warn); }
.q-score-badge.low { background: var(--danger-bg); color: var(--danger); }
.opt-result-row { display: flex; justify-content: space-between; align-items: center; font-size: 13px; padding: 4px 0; color: var(--muted); }
.opt-result-row.is-correct { color: var(--text); font-weight: 500; }
.correct-tag { font-size: 11px; padding: 2px 7px; border-radius: 4px; background: var(--ok-bg); color: var(--ok); margin-left: 6px; }
.restart-row { text-align: center; margin-top: 2rem; }
.results-scoring-opts { background: var(--surface); border: 0.5px solid var(--border); border-radius: var(--radius-sm); padding: 1rem 1.25rem; margin-bottom: 1.25rem; }
.score-checks { display: flex; gap: 16px; flex-wrap: wrap; }
.score-checks label { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); cursor: pointer; user-select: none; }
.score-checks input[type=checkbox] { accent-color: var(--accent); cursor: pointer; }
.page { display: none; }
.intro-card { background: var(--surface); border: 0.5px solid var(--border); border-radius: var(--radius); padding: 2rem; text-align: center; }
.intro-card h2 { font-size: 1.4rem; font-weight: 500; margin-bottom: 1rem; }
.intro-card p { font-size: 14px; color: var(--muted); line-height: 1.7; margin-bottom: .75rem; text-align: left; }
.intro-card ul { text-align: left; font-size: 14px; color: var(--muted); line-height: 1.9; padding-left: 1.25rem; margin-bottom: 1.5rem; }
.score-legend { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; margin: 1rem 0 1.25rem; }
.legend-tile { border-radius: 8px; padding: .6rem .75rem; font-size: 13px; text-align: center; }
.legend-tile .val { font-size: 1.3rem; font-weight: 500; }
.legend-tile.good { background: var(--ok-bg); color: var(--ok); }
.legend-tile.neut { background: var(--warn-bg); color: var(--warn); }
.legend-tile.bad { background: var(--danger-bg); color: var(--danger); }
.divider { border: none; border-top: 0.5px solid var(--border); margin: 1.25rem 0; }
.intro-btns { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.hint-box { background: var(--bg); border: 0.5px solid var(--border); border-radius: var(--radius-sm); padding: 0.9rem 1.1rem; margin-bottom: 1rem; font-size: 13px; color: var(--muted); line-height: 1.6; }
.hint-box code { font-family: var(--font-mono, monospace); font-size: 12px; background: var(--border); padding: 1px 5px; border-radius: 3px; color: var(--text); }
.demo-outer { background: var(--surface); border: 0.5px solid var(--border); border-radius: var(--radius); padding: 1.5rem; margin-bottom: 1rem; }
.panel-grid { display: grid; gap: 0; border: 0.5px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.panel-grid.single { grid-template-columns: minmax(130px, 1.8fr) minmax(0, 2.8fr); }
.panel-grid.triple { grid-template-columns: minmax(100px, 1.2fr) repeat(3, minmax(0, 1fr)); }
.col-header { height: 44px; display: flex; align-items: center; padding: 0 12px; font-size: 12px; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); border-bottom: 0.5px solid var(--border); background: var(--bg); }
.panel-labels { border-right: 0.5px solid var(--border); }
.opt-label-cell { display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-bottom: 0.5px solid var(--border); min-height: 58px; }
.opt-label-cell:last-child { border-bottom: none; }
.opt-letter-sm { font-size: 12px; font-weight: 500; color: var(--muted); width: 20px; height: 20px; border: 0.5px solid var(--border); border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.opt-label-text { font-size: 13px; line-height: 1.35; }
.panel-col { border-left: 0.5px solid var(--border); }
.pane-header { height: 44px; display: flex; align-items: center; justify-content: center; padding: 0 8px; border-bottom: 0.5px solid var(--border); background: var(--bg); }
.pane-header input[type=text] { border: none; background: transparent; font-size: 13px; font-weight: 500; color: var(--text); text-align: center; width: 100%; outline: none; padding: 0; }
.slider-cell { display: flex; flex-direction: column; gap: 5px; padding: 8px 10px; border-bottom: 0.5px solid var(--border); min-height: 58px; justify-content: center; }
.slider-row { display: flex; align-items: center; gap: 6px; }
.slider-row input[type=range] { flex: 1; min-width: 0; }
.num-box { width: 48px; flex-shrink: 0; border: 0.5px solid var(--border); border-radius: 6px; padding: 3px 4px; font-size: 13px; font-weight: 500; color: var(--accent); text-align: center; background: var(--surface); outline: none; -moz-appearance: textfield; }
.num-box::-webkit-outer-spin-button, .num-box::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.num-box:focus { border-color: var(--accent); }
.num-box.invalid { border-color: var(--danger); color: var(--danger); background: var(--danger-bg); }
.pane-footer { display: flex; align-items: center; justify-content: space-between; padding: 8px 10px; border-top: 0.5px solid var(--border); gap: 6px; flex-wrap: wrap; }
.pane-footer .sum-pill { font-size: 12px; }
.pane-footer .btn { padding: 4px 10px; font-size: 12px; }
.score-row { display: grid; gap: 0; border: 0.5px solid var(--border); border-top: none; border-radius: 0 0 var(--radius-sm) var(--radius-sm); overflow: hidden; }
.score-row.single { grid-template-columns: minmax(130px, 1.8fr) minmax(0, 2.8fr); }
.score-row.triple { grid-template-columns: minmax(100px, 1.2fr) repeat(3, minmax(0, 1fr)); }
.score-label-cell { padding: 10px 12px; font-size: 12px; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); display: flex; align-items: center; background: var(--bg); }
.score-val-cell { border-left: 0.5px solid var(--border); padding: 10px 8px; text-align: center; }
.score-val-cell .big { font-size: 1.4rem; font-weight: 500; line-height: 1.2; }
.score-val-cell .lbl { font-size: 11px; color: var(--muted); margin-top: 2px; font-style: italic; }
.option-row { display: grid; grid-template-columns: 28px 1fr; align-items: center; gap: 12px; margin-bottom: 14px; }
.opt-letter { font-size: 13px; font-weight: 500; color: var(--muted); width: 28px; height: 28px; border: 0.5px solid var(--border); border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.opt-inner { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.opt-label { font-size: 14px; line-height: 1.4; }
.opt-slider-row { display: flex; align-items: center; gap: 8px; }
.opt-slider-row input[type=range] { flex: 1; min-width: 0; }
.quiz-num-box { width: 52px; flex-shrink: 0; border: 0.5px solid var(--border); border-radius: 6px; padding: 4px 5px; font-size: 13px; font-weight: 500; color: var(--accent); text-align: center; background: var(--surface); outline: none; -moz-appearance: textfield; }
.quiz-num-box::-webkit-outer-spin-button, .quiz-num-box::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.quiz-num-box:focus { border-color: var(--accent); }
.quiz-num-box.invalid { border-color: var(--danger); color: var(--danger); background: var(--danger-bg); }
</style>
</head>
<body>
<div class="container">
<div class="site-header">
<h1>Probabilistic MCQ</h1>
<p>Express your uncertainty — assign probabilities, not just one answer.</p>
</div>
<div id="intro" class="page">
<div class="intro-card">
<h2>How this test works</h2>
<p>Instead of picking a single answer, you distribute 100% probability across all options — reflecting how confident you are in each one.</p>
<ul>
<li>Use sliders or type a number (0–100) into each box</li>
<li>All options must sum to exactly 100%</li>
<li>Scoring: S = 25 × (0.8 − Brier score)</li>
</ul>
<div class="score-legend">
<div class="legend-tile good"><div class="val">+20</div>perfect answer</div>
<div class="legend-tile neut"><div class="val">0</div>pure ignorance</div>
<div class="legend-tile bad"><div class="val">−30</div>confidently wrong</div>
</div>
<hr class="divider">
<p style="text-align:center;font-size:13px;color:var(--muted);margin-bottom:1.25rem;">
Spreading equally scores 0. More weight on the right answer = higher score. Weight on wrong answers costs you.
</p>
<div class="intro-btns">
<button class="btn" onclick="startDemo()">Demo slide ↗</button>
<button class="btn-accent" onclick="startQuiz()">Start test</button>
</div>
</div>
</div>
<div id="demo" class="page">
<div class="hint-box" id="demo-hint"></div>
<div class="demo-outer">
<span class="demo-badge">Demo</span>
<div class="q-number">Demonstration question</div>
<div class="q-text" id="demo-q-text"></div>
<div id="demo-panel-grid"></div>
<div id="demo-score-row"></div>
</div>
<div style="margin-top:.5rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;">
<button class="btn" onclick="showPage('intro')">← Back</button>
<div style="display:flex;gap:16px;flex-wrap:wrap;align-items:center;">
<label class="toggle-row" style="margin:0;">
<input type="checkbox" id="demo-chk-triple" onchange="onTripleToggle()">
Show three respondents
</label>
<label class="toggle-row" style="margin:0;">
<input type="checkbox" id="demo-chk-auto" onchange="refreshDemoSums()">
Auto-adjust sliders
</label>
</div>
<button class="btn-accent" onclick="startQuiz()">Start test →</button>
</div>
</div>
<div id="quiz" class="page">
<div class="progress-wrap">
<div class="progress-track"><div class="progress-fill" id="prog-fill"></div></div>
<span class="progress-label" id="prog-label"></span>
</div>
<label class="toggle-row">
<input type="checkbox" id="chk-auto" onchange="onAutoToggle()">
Auto-adjust other sliders to keep sum at 100%
</label>
<div class="card">
<div class="q-number" id="q-number"></div>
<div class="q-text" id="q-text"></div>
<div id="slider-list"></div>
<div class="sum-row">
<span class="sum-pill" id="sum-pill"></span>
<div class="btn-row">
<button class="btn" id="btn-norm" onclick="doNormalize()">Normalize</button>
<button class="btn-accent" id="btn-next" onclick="doNext()">Next</button>
</div>
</div>
</div>
<div class="nav-row">
<button class="btn" id="btn-back" onclick="doBack()">Back</button>
<div class="step-dots" id="step-dots"></div>
<div style="width:60px"></div>
</div>
</div>
<div id="results" class="page">
<div class="results-header">
<h2>Your results</h2>
<p>+20 = perfect · 0 = ignorance · −30 = confidently wrong</p>
</div>
<div class="results-scoring-opts">
<div style="font-size:12px;font-weight:500;letter-spacing:0.06em;text-transform:uppercase;color:var(--muted);margin-bottom:0.6rem;">Scoring method</div>
<div class="score-checks" id="results-score-checks"></div>
</div>
<div class="score-grid">
<div class="score-tile"><div class="big" id="res-total">—</div><div class="label">Total score<br><span id="res-total-label">(max +100)</span></div></div>
<div class="score-tile"><div class="big" id="res-avg">—</div><div class="label">Avg per question<br><span id="res-avg-label">(max +20)</span></div></div>
<div class="score-tile"><div class="big" id="res-pct">—</div><div class="label" id="res-pct-label">% of max possible</div></div>
</div>
<div class="bar-container" id="res-bar-wrap">
<div class="bar-axis"><span>−30</span><span>0 (ignorance)</span><span>+20</span></div>
<div class="bar-track">
<div class="bar-neg" id="bar-neg" style="width:0%;left:0%"></div>
<div class="bar-pos" id="bar-pos" style="width:0%;left:60%"></div>
<div class="bar-zero" style="left:60%"></div>
</div>
</div>
<div id="q-breakdown"></div>
<div class="restart-row"><button class="btn-accent" onclick="doRestart()">Try again</button></div>
</div>
</div>
<script>
const DEMO_Q = {
text: "Which planet in our solar system has the most moons?",
options: ["Mars", "Jupiter", "Saturn", "Uranus", "Neptune"],
correct: 2
};
const QUESTIONS = [
{ text: "What is the capital of Malta?", options: ["Larnaca","Valletta","Catania","Ajaccio","Lampedusa"], correct: 1 },
{ text: "David Katz was the first professor in psychology at Stockholm University. What was his research speciality?", options: ["Reaction time studies","Intelligence testing","Tactile perception","Auditory attention","Subliminal perception"], correct: 2 },
{ text: "Which event came first?", options: ["Soviet invasion of Hungary","Cuban Missile Crisis","Assassination of John F. Kennedy","Apollo 11 Moon Landing","Sputnik 1 launch"], correct: 0 },
{ text: "Which country came second in Eurovision in the year ABBA won?", options: ["Italy","Luxembourg","United Kingdom","Ukraine","Norway"], correct: 0 },
{ text: "Who wrote the book \"2001: A Space Odyssey\"?", options: ["Anthony Burgess","Stanislaw Lem","Isaac Asimov","Arthur C. Clarke","Graham Green"], correct: 3 }
];
/* ── page routing ── */
function showPage(id) {
document.querySelectorAll('.page').forEach(p => p.style.display = 'none');
document.getElementById(id).style.display = 'block';
}
/* ── math ── */
function brierIgnorance(n) { return (n-1)/n; }
function computeBrier(probs, correct) {
const s = probs.reduce((a,b)=>a+b,0);
return probs.reduce((acc,p,i) => acc + Math.pow(p/s - (i===correct?1:0), 2), 0);
}
function computeScaled(probs, correct) { return 25*(brierIgnorance(probs.length)-computeBrier(probs,correct)); }
function computeLog(probs, correct) { const s=probs.reduce((a,b)=>a+b,0); const p=probs[correct]/s; return p<=0?-Infinity:Math.log(p); }
function proportionalAdjustFloat(probs, idx, newVal) {
newVal = Math.max(0, Math.min(100, newVal));
const budget = 100 - newVal;
const others = probs.map((_,i)=>i).filter(i=>i!==idx);
const otherSum = others.reduce((s,i)=>s+probs[i],0);
let result = probs.slice(); result[idx] = newVal;
if(otherSum === 0) { const share=budget/others.length; others.forEach(i=>{result[i]=share;}); }
else { others.forEach(i=>{ result[i] = probs[i]===0 ? 0 : (probs[i]/otherSum)*budget; }); }
return result;
}
function equalFloatArr(n) { return Array(n).fill(100/n); }
function normalizeFloatArr(arr) { const s=arr.reduce((a,b)=>a+b,0); if(s===0) return equalFloatArr(arr.length); return arr.map(v=>v/s*100); }
function toDisplayInts(floats) {
const sum=floats.reduce((a,b)=>a+b,0); if(sum===0) return floats.map(()=>0);
const scaled=floats.map(v=>v/sum*100); const floors=scaled.map(v=>Math.floor(v));
const fracs=scaled.map((v,i)=>({i,f:v-floors[i]})); let rem=100-floors.reduce((a,b)=>a+b,0);
fracs.sort((a,b)=>b.f-a.f); for(let k=0;k<rem;k++) floors[fracs[k].i]++; return floors;
}
function isNormalized(floats) { return Math.abs(floats.reduce((a,b)=>a+b,0) - 100) < 0.5; }
function fmtScaled(v) { const r=parseFloat(v.toFixed(2)); if(Math.abs(r)<0.005) return {txt:'0.00',cls:'zero'}; return r>0?{txt:'+'+r.toFixed(2),cls:'positive'}:{txt:r.toFixed(2),cls:'negative'}; }
function parseBox(raw) { const s=raw.trim(); if(!/^\d+$/.test(s)) return null; const n=parseInt(s,10); return (n>=0&&n<=100)?n:null; }
/* ── DEMO ── */
const NPANES = 3;
let demoProbs = Array.from({length:NPANES}, ()=>equalFloatArr(DEMO_Q.options.length));
let tripleMode = false;
function startDemo() {
document.getElementById('demo-q-text').textContent = DEMO_Q.text;
document.getElementById('demo-hint').innerHTML =
`<strong>Presenter note:</strong> The correct answer is option
<strong>${String.fromCharCode(65+DEMO_Q.correct)} — ${DEMO_Q.options[DEMO_Q.correct]}</strong>.
To change this question, edit <code>DEMO_Q</code> at the top of the <script> block.`;
demoProbs = Array.from({length:NPANES}, ()=>equalFloatArr(DEMO_Q.options.length));
tripleMode = false;
document.getElementById('demo-chk-triple').checked = false;
document.getElementById('demo-chk-auto').checked = false;
renderDemoPanel();
showPage('demo');
}
function onTripleToggle() { tripleMode = document.getElementById('demo-chk-triple').checked; renderDemoPanel(); }
function renderDemoPanel() {
const gridCls = tripleMode ? 'triple' : 'single';
const activePanes = tripleMode ? NPANES : 1;
const labelsHTML = `<div class="panel-labels">
<div class="col-header">Options</div>
${DEMO_Q.options.map((opt,i)=>`<div class="opt-label-cell"><div class="opt-letter-sm">${String.fromCharCode(65+i)}</div><span class="opt-label-text">${opt}</span></div>`).join('')}
<div style="height:53px;border-top:0.5px solid var(--border);"></div>
</div>`;
let panesHTML = '';
for(let p=0;p<activePanes;p++){
const disp=toDisplayInts(demoProbs[p]);
const label=tripleMode?`Respondent ${p+1}`:'Your response';
panesHTML += `<div class="panel-col">
<div class="pane-header"><input type="text" value="${label}" id="dlabel${p}" style="width:100%;text-align:center;"></div>
${DEMO_Q.options.map((opt,i)=>`<div class="slider-cell"><div class="slider-row">
<input type="range" id="dsl${p}_${i}" min="0" max="100" step="1" value="${disp[i]}" oninput="onDemoSlider(${p},${i},parseInt(this.value))">
<input type="number" class="num-box" id="dnb${p}_${i}" min="0" max="100" step="1" value="${disp[i]}" oninput="onDemoNumBox(${p},${i},this)">
</div></div>`).join('')}
<div class="pane-footer">
<span class="sum-pill ok" id="dsum${p}">100%</span>
<div class="btn-row">
<button class="btn" id="dnorm${p}" onclick="demoNorm(${p})">Normalize</button>
<button class="btn" onclick="demoReset(${p})">Reset</button>
</div>
</div>
</div>`;
}
document.getElementById('demo-panel-grid').innerHTML = `<div class="panel-grid ${gridCls}">${labelsHTML}${panesHTML}</div>`;
let scoreHTML = `<div class="score-label-cell">Score</div>`;
for(let p=0;p<activePanes;p++) scoreHTML += scoreCell(p);
document.getElementById('demo-score-row').innerHTML = `<div class="score-row ${gridCls}">${scoreHTML}</div>`;
refreshDemoSums();
}
function scoreCell(p) {
if(!isNormalized(demoProbs[p])) return `<div class="score-val-cell"><div class="big zero">—</div><div class="lbl">normalize first</div></div>`;
const {txt,cls}=fmtScaled(computeScaled(demoProbs[p],DEMO_Q.correct));
return `<div class="score-val-cell"><div class="big ${cls}">${txt}</div><div class="lbl">scaled score</div></div>`;
}
function refreshScoreRow() {
const activePanes=tripleMode?NPANES:1; const gridCls=tripleMode?'triple':'single';
let h=`<div class="score-label-cell">Score</div>`;
for(let p=0;p<activePanes;p++) h+=scoreCell(p);
document.getElementById('demo-score-row').innerHTML=`<div class="score-row ${gridCls}">${h}</div>`;
}
function syncDemoPaneInputs(pidx) {
const disp=toDisplayInts(demoProbs[pidx]);
for(let i=0;i<DEMO_Q.options.length;i++){
const sl=document.getElementById(`dsl${pidx}_${i}`), nb=document.getElementById(`dnb${pidx}_${i}`);
if(sl) sl.value=disp[i]; if(nb){nb.value=disp[i];nb.classList.remove('invalid');}
}
}
function onDemoSlider(pidx,optIdx,val){
const autoOn=document.getElementById('demo-chk-auto').checked;
if(autoOn){demoProbs[pidx]=proportionalAdjustFloat(demoProbs[pidx],optIdx,val);syncDemoPaneInputs(pidx);}
else{demoProbs[pidx][optIdx]=val;const nb=document.getElementById(`dnb${pidx}_${optIdx}`);if(nb){nb.value=val;nb.classList.remove('invalid');}}
refreshDemoSums();refreshScoreRow();
}
function onDemoNumBox(pidx,optIdx,el){
const val=parseBox(el.value); if(val===null){el.classList.add('invalid');return;} el.classList.remove('invalid');
const autoOn=document.getElementById('demo-chk-auto').checked;
if(autoOn){demoProbs[pidx]=proportionalAdjustFloat(demoProbs[pidx],optIdx,val);syncDemoPaneInputs(pidx);}
else{demoProbs[pidx][optIdx]=val;const sl=document.getElementById(`dsl${pidx}_${optIdx}`);if(sl)sl.value=val;}
refreshDemoSums();refreshScoreRow();
}
function demoNorm(pidx){demoProbs[pidx]=normalizeFloatArr(demoProbs[pidx]);syncDemoPaneInputs(pidx);refreshDemoSums();refreshScoreRow();}
function demoReset(pidx){demoProbs[pidx]=equalFloatArr(DEMO_Q.options.length);syncDemoPaneInputs(pidx);refreshDemoSums();refreshScoreRow();}
function refreshDemoSums(){
const activePanes=tripleMode?NPANES:1; const autoOn=document.getElementById('demo-chk-auto').checked;
for(let p=0;p<activePanes;p++){
const rawSum=demoProbs[p].reduce((a,b)=>a+b,0); const diff=Math.round(rawSum)-100;
const pill=document.getElementById(`dsum${p}`); if(!pill) continue;
if(Math.abs(diff)<0.5){pill.className='sum-pill ok';pill.textContent='100%';}
else if(diff>0){pill.className='sum-pill over';pill.textContent=`${Math.round(rawSum)}% — ${diff}% over`;}
else{pill.className='sum-pill under';pill.textContent=`${Math.round(rawSum)}% — ${Math.abs(diff)}% short`;}
const nb=document.getElementById(`dnorm${p}`); if(nb) nb.disabled=autoOn;
}
}
/* ── QUIZ ── */
let current=0, answers=QUESTIONS.map(q=>equalFloatArr(q.options.length)), answerNormalized=QUESTIONS.map(()=>true);
function onAutoToggle(){const autoOn=document.getElementById('chk-auto').checked;if(autoOn){answers[current]=normalizeFloatArr(answers[current]);answerNormalized[current]=true;syncQuizInputs();}refreshStatus();}
function doNormalize(){answers[current]=normalizeFloatArr(answers[current]);answerNormalized[current]=true;syncQuizInputs();refreshStatus();}
function syncQuizInputs(){
const disp=toDisplayInts(answers[current]);
answers[current].forEach((v,i)=>{const sl=document.getElementById('sl'+i),nb=document.getElementById('nb'+i);if(sl)sl.value=disp[i];if(nb){nb.value=disp[i];nb.classList.remove('invalid');}});
}
function onSlider(idx,val){
val=parseInt(val); const autoOn=document.getElementById('chk-auto').checked;
if(autoOn){answers[current]=proportionalAdjustFloat(answers[current],idx,val);answerNormalized[current]=true;syncQuizInputs();}
else{answers[current][idx]=val;answerNormalized[current]=false;const nb=document.getElementById('nb'+idx);if(nb){nb.value=val;nb.classList.remove('invalid');}}
refreshStatus();
}
function onNumBox(idx,el){
const val=parseBox(el.value);if(val===null){el.classList.add('invalid');return;}el.classList.remove('invalid');
const autoOn=document.getElementById('chk-auto').checked;
if(autoOn){answers[current]=proportionalAdjustFloat(answers[current],idx,val);answerNormalized[current]=true;syncQuizInputs();}
else{answers[current][idx]=val;answerNormalized[current]=false;const sl=document.getElementById('sl'+idx);if(sl)sl.value=val;}
refreshStatus();
}
function refreshStatus(){
const autoOn=document.getElementById('chk-auto')&&document.getElementById('chk-auto').checked;
const rawSum=answers[current].reduce((a,b)=>a+b,0); const sumOk=Math.abs(rawSum-100)<0.5;
const ready=answerNormalized[current]&&sumOk;
const pill=document.getElementById('sum-pill'); if(!pill) return;
if(ready){pill.className='sum-pill ok';pill.textContent='Sum = 100% — ready!';}
else if(!sumOk){const diff=Math.round(rawSum)-100;if(diff>0){pill.className='sum-pill over';pill.textContent=`Sum = ${Math.round(rawSum)}% — ${diff}% over`;}else{pill.className='sum-pill under';pill.textContent=`Sum = ${Math.round(rawSum)}% — ${Math.abs(diff)}% short`;}}
else{pill.className='sum-pill under';pill.textContent='Press Normalize (or use auto-adjust) to continue';}
document.getElementById('btn-next').disabled=!ready;
document.getElementById('btn-norm').disabled=autoOn;
}
function renderQuestion(){
const q=QUESTIONS[current],n=QUESTIONS.length;
document.getElementById('prog-fill').style.width=(current/n*100)+'%';
document.getElementById('prog-label').textContent=`${current+1} of ${n}`;
document.getElementById('q-number').textContent=`Question ${current+1}`;
document.getElementById('q-text').textContent=q.text;
const disp=toDisplayInts(answers[current]);
document.getElementById('slider-list').innerHTML=q.options.map((opt,i)=>`
<div class="option-row">
<div class="opt-letter">${String.fromCharCode(65+i)}</div>
<div class="opt-inner">
<span class="opt-label">${opt}</span>
<div class="opt-slider-row">
<input type="range" id="sl${i}" min="0" max="100" step="1" value="${disp[i]}" oninput="onSlider(${i},parseInt(this.value))">
<input type="number" class="quiz-num-box" id="nb${i}" min="0" max="100" step="1" value="${disp[i]}" oninput="onNumBox(${i},this)">
</div>
</div>
</div>`).join('');
document.getElementById('step-dots').innerHTML=QUESTIONS.map((_,i)=>`<div class="dot ${i<current?'done':i===current?'current':''}"></div>`).join('');
document.getElementById('btn-back').disabled=(current===0);
document.getElementById('btn-next').textContent=current===n-1?'Submit':'Next';
refreshStatus();
}
function startQuiz(){current=0;answers=QUESTIONS.map(q=>equalFloatArr(q.options.length));answerNormalized=QUESTIONS.map(()=>true);showPage('quiz');document.getElementById('chk-auto').checked=false;renderQuestion();}
function doNext(){if(!answerNormalized[current])return;if(current===QUESTIONS.length-1){showResults();return;}current++;renderQuestion();}
function doBack(){if(current===0)return;current--;renderQuestion();}
/* ── RESULTS ── */
let resChecks={brier:false,log:false};
function colorClass(v){return v>0?'positive':v<0?'negative':'zero';}
function renderResCheckboxes(){document.getElementById('results-score-checks').innerHTML=`<label><input type="checkbox" ${resChecks.brier?'checked':''} onchange="resChecks.brier=this.checked;refreshResults()"> Raw Brier (lower = better; 0 = perfect)</label><label><input type="checkbox" ${resChecks.log?'checked':''} onchange="resChecks.log=this.checked;refreshResults()"> Log score (0 = perfect; −∞ = p=0 on correct)</label>`;}
function refreshResults(){
const scores=QUESTIONS.map((q,i)=>{if(resChecks.log)return computeLog(answers[i],q.correct);if(resChecks.brier)return computeBrier(answers[i],q.correct);return computeScaled(answers[i],q.correct);});
const useScaled=!resChecks.brier&&!resChecks.log; const hasInf=scores.some(s=>!isFinite(s));
const total=hasInf?-Infinity:scores.reduce((a,b)=>a+b,0); const avg=hasInf?-Infinity:total/scores.length;
function fmt(v,dec){if(!isFinite(v))return'−∞';const r=parseFloat(v.toFixed(dec));return(useScaled&&r>=0?'+':'')+r.toFixed(dec);}
const te=document.getElementById('res-total');te.textContent=fmt(total,1);te.className='big '+(isFinite(total)?colorClass(resChecks.brier?-total:total):'negative');
const ae=document.getElementById('res-avg');ae.textContent=fmt(avg,1);ae.className='big '+(isFinite(avg)?colorClass(resChecks.brier?-avg:avg):'negative');
const pe=document.getElementById('res-pct');
if(useScaled){
const maxTotal=20*QUESTIONS.length,pct=isFinite(total)?Math.round(total/maxTotal*100):0;
pe.textContent=pct+'%';pe.className='big '+colorClass(pct);
document.getElementById('res-pct-label').textContent='% of max possible';
document.getElementById('res-total-label').textContent='(max +'+(20*QUESTIONS.length)+')';
document.getElementById('res-avg-label').textContent='(max +20)';
document.getElementById('res-bar-wrap').style.display='block';
if(isFinite(avg)){const ZL=60,NS=30,PS=20;if(avg<=0){const w=Math.min(Math.abs(avg)/NS,1)*ZL;document.getElementById('bar-neg').style.cssText=`width:${w}%;left:${ZL-w}%`;document.getElementById('bar-pos').style.width='0%';}else{const w=Math.min(avg/PS,1)*(100-ZL);document.getElementById('bar-pos').style.cssText=`width:${w}%;left:${ZL}%`;document.getElementById('bar-neg').style.width='0%';}}
} else {
pe.textContent=fmt(avg,3);pe.className='big '+(isFinite(avg)?colorClass(resChecks.brier?-avg:avg):'negative');
document.getElementById('res-pct-label').textContent=resChecks.brier?'Avg Brier':'Avg log score';
document.getElementById('res-total-label').textContent=resChecks.brier?'Total Brier':'Total log score';
document.getElementById('res-avg-label').textContent='(0 = perfect)';
document.getElementById('res-bar-wrap').style.display='none';
}
const disp=answers.map(a=>toDisplayInts(a));
document.getElementById('q-breakdown').innerHTML=QUESTIONS.map((q,i)=>{
const sc=scores[i];let badgeCls;
if(resChecks.brier)badgeCls=sc<0.3?'high':sc<0.7?'mid':'low';
else if(resChecks.log)badgeCls=!isFinite(sc)?'low':sc>-0.5?'high':sc>-1?'mid':'low';
else badgeCls=sc>5?'high':sc>=-5?'mid':'low';
const fmtSc=!isFinite(sc)?'−∞':(useScaled&&sc>=0?'+':'')+sc.toFixed(useScaled?1:3);
return `<div class="q-result"><div class="q-result-header"><div class="q-result-text">${q.text}</div><span class="q-score-badge ${badgeCls}">${fmtSc}</span></div>${q.options.map((opt,j)=>`<div class="opt-result-row ${j===q.correct?'is-correct':''}"><span>${String.fromCharCode(65+j)}. ${opt}${j===q.correct?'<span class="correct-tag">correct</span>':''}</span><span>${disp[i][j]}%</span></div>`).join('')}</div>`;
}).join('');
}
function showResults(){showPage('results');resChecks={brier:false,log:false};renderResCheckboxes();setTimeout(refreshResults,100);}
function doRestart(){current=0;answers=QUESTIONS.map(q=>equalFloatArr(q.options.length));answerNormalized=QUESTIONS.map(()=>true);showPage('quiz');document.getElementById('chk-auto').checked=false;renderQuestion();}
/* ── init: always start at intro ── */
showPage('intro');
</script>
</body>
</html>