<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: transparent;
      padding: 12px 8px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
    }

    /* Container: strictly flat, no border/shadow/card wrapper */
    .train-stage {
      width: 100%;
      max-width: 620px;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    /* Step Navigation Header */
    .controls {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }

    .step-pills {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
    }

    .pill-btn {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      color: #475569;
      font-size: 12px;
      font-weight: 600;
      padding: 5px 10px;
      border-radius: 999px;
      cursor: pointer;
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .pill-btn.active {
      background: #1e2945;
      color: #ffffff;
      border-color: #1e2945;
    }

    .play-btn {
      background: #22b7ff;
      color: #ffffff;
      border: none;
      font-size: 12px;
      font-weight: 700;
      padding: 5px 12px;
      border-radius: 999px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 5px;
      transition: background 0.2s ease;
    }

    .play-btn:active {
      background: #009ce0;
    }

    /* Train Track & Train Row */
    .train-viewport {
      position: relative;
      width: 100%;
      padding-bottom: 12px;
    }

    .train-row {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 6px;
      position: relative;
      z-index: 2;
    }

    .car-wrapper {
      flex: 1;
      min-width: 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      cursor: pointer;
      position: relative;
    }

    /* Train Car Body */
    .car-box {
      width: 100%;
      border-radius: 12px;
      padding: 10px 8px;
      min-height: 84px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      border: 2px solid transparent;
      box-shadow: 0 2px 6px rgba(30, 41, 69, 0.06);
      transition: transform 0.25s ease, opacity 0.25s ease, box-shadow 0.25s ease;
      opacity: 0.45;
    }

    .car-wrapper.active .car-box {
      opacity: 1;
      box-shadow: 0 6px 14px rgba(30, 41, 69, 0.12);
      transform: translateY(-2px);
    }

    /* Specific Car Colors */
    .car-cyan .car-box {
      background: #e0f7fa;
      border-color: #00bcd4;
    }

    .car-amber .car-box {
      background: #fff8e1;
      border-color: #ffb300;
    }

    .car-emerald .car-box {
      background: #e8f5e9;
      border-color: #10b981;
    }

    .car-header {
      font-size: 11px;
      font-weight: 800;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      margin-bottom: 4px;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .car-cyan .car-header { color: #00838f; }
    .car-amber .car-header { color: #b45309; }
    .car-emerald .car-header { color: #047857; }

    .car-text {
      font-size: 12.5px;
      line-height: 1.25;
      font-weight: 700;
      color: #1e2945;
    }

    /* Couplers (between cars) */
    .coupler {
      position: absolute;
      right: -8px;
      top: 50%;
      width: 10px;
      height: 6px;
      background: #64748b;
      border-radius: 2px;
      z-index: 1;
    }

    /* Wheel Assembly */
    .wheels {
      display: flex;
      justify-content: space-around;
      width: 75%;
      margin-top: 3px;
    }

    .wheel {
      width: 14px;
      height: 14px;
      background: #334155;
      border: 2px solid #94a3b8;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .wheel-inner {
      width: 4px;
      height: 4px;
      background: #f8fafc;
      border-radius: 50%;
    }

    /* Railway Track */
    .track {
      position: relative;
      width: 100%;
      height: 6px;
      background: #475569;
      border-radius: 3px;
      margin-top: -2px;
      z-index: 1;
    }

    .track-sleepers {
      position: absolute;
      top: 3px;
      left: 0;
      right: 0;
      height: 6px;
      background-image: repeating-linear-gradient(90deg, #94a3b8 0px, #94a3b8 5px, transparent 5px, transparent 15px);
    }

    /* Cumulative Connected Summary Box */
    .summary-card {
      background: #f8fafc;
      border: 2px solid #cbd5e1;
      border-radius: 12px;
      padding: 12px 14px;
      position: relative;
    }

    .summary-badge {
      display: inline-block;
      font-size: 11px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: #64748b;
      margin-bottom: 6px;
    }

    .summary-sentence {
      font-size: 14px;
      font-weight: 600;
      line-height: 1.45;
      color: #334155;
    }

    /* Highlight tokens inside summary matching cars */
    .hl-ch1 {
      color: #0e7490;
      background: #cffafe;
      padding: 1px 5px;
      border-radius: 4px;
      font-weight: 700;
      border: 1px solid #a5f3fc;
      transition: all 0.25s ease;
      opacity: 0.45;
    }

    .hl-ch2 {
      color: #b45309;
      background: #fef3c7;
      padding: 1px 5px;
      border-radius: 4px;
      font-weight: 700;
      border: 1px solid #fde68a;
      transition: all 0.25s ease;
      opacity: 0.45;
    }

    .hl-ch3 {
      color: #047857;
      background: #d1fae5;
      padding: 1px 5px;
      border-radius: 4px;
      font-weight: 700;
      border: 1px solid #a7f3d0;
      transition: all 0.25s ease;
      opacity: 0.45;
    }

    .hl-on {
      opacity: 1;
      box-shadow: 0 1px 4px rgba(0,0,0,0.08);
    }

    /* Status indicator */
    .status-hint {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      font-size: 12px;
      font-weight: 600;
      color: #64748b;
      margin-top: 2px;
    }

    .pulse-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #22b7ff;
    }
  </style>
</head>
<body>

  <div class="train-stage">
    
    
    <div class="controls">
      <div class="step-pills">
        <button class="pill-btn active" onclick="setStep(0)">1. Bell</button>
        <button class="pill-btn" onclick="setStep(1)">2. Tracks</button>
        <button class="pill-btn" onclick="setStep(2)">3. Suspect</button>
        <button class="pill-btn" onclick="setStep(3)">✦ Connected Story</button>
      </div>

      <button id="playToggle" class="play-btn" onclick="togglePlay()">
        <span id="playIcon">⏸</span> <span id="playLabel">Pause</span>
      </button>
    </div>

    
    <div class="train-viewport">
      <div class="train-row">
        
        
        <div id="car0" class="car-wrapper car-cyan active" onclick="setStep(0)">
          <div class="coupler"></div>
          <div class="car-box">
            <span class="car-header">🔔 Chapter 1</span>
            <span class="car-text">Golden bell<br>is missing</span>
          </div>
          <div class="wheels">
            <div class="wheel"><div class="wheel-inner"></div></div>
            <div class="wheel"><div class="wheel-inner"></div></div>
          </div>
        </div>

        
        <div id="car1" class="car-wrapper car-amber" onclick="setStep(1)">
          <div class="coupler"></div>
          <div class="car-box">
            <span class="car-header">🐾 Chapter 2</span>
            <span class="car-text">Muddy paw prints<br>found</span>
          </div>
          <div class="wheels">
            <div class="wheel"><div class="wheel-inner"></div></div>
            <div class="wheel"><div class="wheel-inner"></div></div>
          </div>
        </div>

        
        <div id="car2" class="car-wrapper car-emerald" onclick="setStep(2)">
          <div class="car-box">
            <span class="car-header">🔍 Chapter 3</span>
            <span class="car-text">Search for a<br>furry suspect!</span>
          </div>
          <div class="wheels">
            <div class="wheel"><div class="wheel-inner"></div></div>
            <div class="wheel"><div class="wheel-inner"></div></div>
          </div>
        </div>

      </div>

      
      <div class="track">
        <div class="track-sleepers"></div>
      </div>
    </div>

    
    <div class="summary-card">
      <div class="summary-badge">🔗 Connected Story (Chapter 1 + 2 + 3)</div>
      <p class="summary-sentence">
        <span id="hlBarnaby" class="hl-ch3">Barnaby is tracking</span>
        <span id="hlPaw" class="hl-ch2">muddy paw prints</span> to find the town's
        <span id="hlBell" class="hl-ch1">stolen golden bell</span>.
      </p>
    </div>

    <div class="status-hint">
      <span class="pulse-dot"></span>
      <span id="hintText">Each chapter adds a train car to build the full plot.</span>
    </div>

  </div>

  <script>
    let currentStep = 0;
    let isPlaying = true;
    let timer = null;

    const hints = [
      "Chapter 1 sets up the mystery (The Missing Bell).",
      "Chapter 2 adds a new clue (The Muddy Paw Prints).",
      "Chapter 3 introduces the investigation (Furry Suspect)!",
      "Connected stamina: all chapters build one complete story!"
    ];

    function applyState() {
      // Update pills
      const pills = document.querySelectorAll('.pill-btn');
      pills.forEach((p, idx) => {
        p.classList.toggle('active', idx === currentStep);
      });

      // Update cars
      for (let i = 0; i < 3; i++) {
        const car = document.getElementById('car' + i);
        if (currentStep === 3) {
          car.classList.add('active');
        } else {
          car.classList.toggle('active', i <= currentStep);
        }
      }

      // Update highlights in summary sentence
      const hlBell = document.getElementById('hlBell');
      const hlPaw = document.getElementById('hlPaw');
      const hlBarnaby = document.getElementById('hlBarnaby');

      if (currentStep === 0) {
        hlBell.classList.add('hl-on');
        hlPaw.classList.remove('hl-on');
        hlBarnaby.classList.remove('hl-on');
      } else if (currentStep === 1) {
        hlBell.classList.add('hl-on');
        hlPaw.classList.add('hl-on');
        hlBarnaby.classList.remove('hl-on');
      } else if (currentStep === 2) {
        hlBell.classList.add('hl-on');
        hlPaw.classList.add('hl-on');
        hlBarnaby.classList.add('hl-on');
      } else {
        hlBell.classList.add('hl-on');
        hlPaw.classList.add('hl-on');
        hlBarnaby.classList.add('hl-on');
      }

      // Update hint
      document.getElementById('hintText').textContent = hints[currentStep];
    }

    function setStep(index) {
      currentStep = index;
      applyState();
    }

    function nextStep() {
      currentStep = (currentStep + 1) % 4;
      applyState();
    }

    function togglePlay() {
      isPlaying = !isPlaying;
      const icon = document.getElementById('playIcon');
      const label = document.getElementById('playLabel');

      if (isPlaying) {
        icon.textContent = '⏸';
        label.textContent = 'Pause';
        startTimer();
      } else {
        icon.textContent = '▶';
        label.textContent = 'Play';
        clearInterval(timer);
      }
    }

    function startTimer() {
      clearInterval(timer);
      timer = setInterval(() => {
        if (isPlaying) {
          nextStep();
        }
      }, 3200);
    }

    // Initialize
    applyState();
    startTimer();
  </script>
</body>
</html>

Reading Grade-Level Chapter Books with Stamina

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      background: transparent;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 12px;
      min-height: 100%;
    }

    .comparison-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 14px;
      width: 100%;
    }

    .column-card {
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 14px;
      padding: 16px 14px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .column-card.filter-card {
      border-color: #cbd5e1;
      background: #f8fafc;
    }

    .column-card.keep-card {
      border-color: #a7f3d0;
      background: #f0fdf4;
    }

    .card-header {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 15px;
      font-weight: 700;
      line-height: 1.25;
    }

    .filter-header {
      color: #64748b;
    }

    .keep-header {
      color: #059669;
    }

    .icon-badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 28px;
      height: 28px;
      border-radius: 8px;
      font-size: 15px;
      flex-shrink: 0;
    }

    .filter-badge {
      background: #e2e8f0;
      color: #475569;
    }

    .keep-badge {
      background: #d1fae5;
      color: #059669;
    }

    .example-list {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .example-item {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 10px 12px;
      border-radius: 10px;
      font-size: 14px;
      line-height: 1.35;
      font-weight: 500;
    }

    .filter-item {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      color: #64748b;
    }

    .keep-item {
      background: #ffffff;
      border: 1px solid #bbf7d0;
      color: #0f172a;
      font-weight: 600;
    }

    .symbol {
      font-size: 16px;
      line-height: 1;
      flex-shrink: 0;
    }

    .filter-symbol {
      color: #94a3b8;
    }

    .keep-symbol {
      color: #059669;
    }
  </style>
</head>
<body>

  <div class="comparison-grid">
    
    <div class="column-card filter-card">
      <div class="card-header filter-header">
        <span class="icon-badge filter-badge">▽</span>
        <span>Incidental Details<br><small style="font-size:12px;font-weight:600;opacity:0.85;">(Filter Out)</small></span>
      </div>
      <div class="example-list">
        <div class="example-item filter-item">
          <span class="symbol filter-symbol">✕</span>
          <span>Barnaby puts on blue socks</span>
        </div>
        <div class="example-item filter-item">
          <span class="symbol filter-symbol">✕</span>
          <span>Barnaby eats a muffin</span>
        </div>
      </div>
    </div>

    
    <div class="column-card keep-card">
      <div class="card-header keep-header">
        <span class="icon-badge keep-badge">★</span>
        <span>Essential Plot Turns<br><small style="font-size:12px;font-weight:600;opacity:0.85;">(Keep &amp; Connect)</small></span>
      </div>
      <div class="example-list">
        <div class="example-item keep-item">
          <span class="symbol keep-symbol">✓</span>
          <span>Barnaby discovers muddy paw prints</span>
        </div>
        <div class="example-item keep-item">
          <span class="symbol keep-symbol">✓</span>
          <span>Barnaby questions the baker</span>
        </div>
      </div>
    </div>
  </div>

</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="1:1">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      background: transparent;
      color: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      height: 100%;
      user-select: none;
      -webkit-user-select: none;
    }

    .header-flow {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 12px;
      gap: 6px;
    }

    .step-pill {
      flex: 1;
      text-align: center;
      padding: 6px 4px;
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 700;
      color: #64748b;
      cursor: pointer;
      transition: all 0.25s ease;
    }

    .step-pill.active {
      background: #22b7ff;
      border-color: #22b7ff;
      color: #ffffff;
      box-shadow: 0 2px 8px rgba(34, 183, 255, 0.35);
    }

    .grid-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      flex: 1;
    }

    .flow-card {
      background: #ffffff;
      border: 1.5px solid #e6e6e6;
      border-radius: 14px;
      padding: 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      position: relative;
      cursor: pointer;
      transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
    }

    .flow-card.active {
      border-color: #22b7ff;
      box-shadow: 0 0 0 2px rgba(34, 183, 255, 0.25), 0 4px 12px rgba(0, 0, 0, 0.06);
      background: #f8fcff;
    }

    .step-badge {
      position: absolute;
      top: 8px;
      left: 8px;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: #e2e8f0;
      color: #475569;
      font-size: 11px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 0.25s ease, color 0.25s ease;
    }

    .flow-card.active .step-badge {
      background: #22b7ff;
      color: #ffffff;
    }

    .card-icon {
      font-size: 32px;
      line-height: 1.1;
      margin-bottom: 8px;
      margin-top: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
    }

    .card-title {
      font-size: 14px;
      font-weight: 700;
      line-height: 1.2;
      color: #1e2945;
    }

    .controls {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      margin-top: 10px;
    }

    .ctrl-btn {
      background: #f8fafc;
      border: 1px solid #cbd5e1;
      border-radius: 8px;
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: background 0.2s ease;
    }

    .ctrl-btn:active {
      background: #e2e8f0;
    }
  </style>
</head>
<body>

  <div class="header-flow">
    <div class="step-pill active" data-step="0">1. Drift</div>
    <div class="step-pill" data-step="1">2. Stop</div>
    <div class="step-pill" data-step="2">3. Rewind</div>
    <div class="step-pill" data-step="3">4. Re-read</div>
  </div>

  <div class="grid-container">
    <div class="flow-card active" data-step="0">
      <div class="step-badge">1</div>
      <div class="card-icon">💭🍕</div>
      <div class="card-title">Mind<br>Wanders</div>
    </div>

    <div class="flow-card" data-step="1">
      <div class="step-badge">2</div>
      <div class="card-icon">🛑✋</div>
      <div class="card-title">Stop &amp;<br>Notice</div>
    </div>

    <div class="flow-card" data-step="2">
      <div class="step-badge">3</div>
      <div class="card-icon">↺📄</div>
      <div class="card-title">Rewind<br>2 Pages</div>
    </div>

    <div class="flow-card" data-step="3">
      <div class="step-badge">4</div>
      <div class="card-icon">📖⭐</div>
      <div class="card-title">Re-read &amp;<br>Focus</div>
    </div>
  </div>

  <div class="controls">
    <button class="ctrl-btn" id="playBtn">⏸ Pause</button>
  </div>

  <script src="{{VENDOR_CDN}}/classace-diagram.js"></script>
  <script>
    const cards = $$('.flow-card');
    const pills = $$('.step-pill');
    const playBtn = $('#playBtn');

    let current = 0;
    let isPlaying = true;
    let timer = null;

    function setStep(index) {
      current = index;
      cards.forEach((c, i) => c.classList.toggle('active', i === current));
      pills.forEach((p, i) => p.classList.toggle('active', i === current));
    }

    function nextStep() {
      setStep((current + 1) % cards.length);
    }

    function startAuto() {
      if (timer) clearInterval(timer);
      timer = setInterval(nextStep, 3200);
      isPlaying = true;
      if (playBtn) playBtn.textContent = '⏸ Pause';
    }

    function pauseAuto() {
      if (timer) clearInterval(timer);
      timer = null;
      isPlaying = false;
      if (playBtn) playBtn.textContent = '▶ Auto';
    }

    cards.forEach((card, idx) => {
      onTap(card, () => {
        pauseAuto();
        setStep(idx);
      });
    });

    pills.forEach((pill, idx) => {
      onTap(pill, () => {
        pauseAuto();
        setStep(idx);
      });
    });

    if (playBtn) {
      onTap(playBtn, () => {
        if (isPlaying) {
          pauseAuto();
        } else {
          nextStep();
          startAuto();
        }
      });
    }

    startAuto();
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      width: 100%;
      min-height: 100%;
      background: transparent;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 16px 12px;
    }

    .main-stage {
      width: 100%;
      max-width: 460px;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .header {
      text-align: center;
    }

    .title {
      font-size: 18px;
      font-weight: 800;
      color: #1e2945;
      letter-spacing: -0.2px;
    }

    .subtitle {
      font-size: 13px;
      font-weight: 500;
      color: #64748b;
      margin-top: 2px;
    }

    /* Track Area */
    .track-section {
      position: relative;
      width: 100%;
      padding: 12px 0 4px;
    }

    .track-wrapper {
      position: relative;
      width: 100%;
      height: 44px;
      margin-bottom: 16px;
    }

    .track-line-bg {
      position: absolute;
      top: 50%;
      left: 10%;
      right: 10%;
      height: 8px;
      background: #e2e8f0;
      border-radius: 4px;
      transform: translateY(-50%);
    }

    .track-line-fill {
      position: absolute;
      top: 50%;
      left: 10%;
      height: 8px;
      background: linear-gradient(90deg, #22b7ff, #10b981);
      border-radius: 4px;
      transform: translateY(-50%);
      width: 0%;
      transition: width 0.45s ease;
    }

    .bookworm {
      position: absolute;
      top: -4px;
      left: 10%;
      transform: translateX(-50%);
      font-size: 28px;
      line-height: 1;
      transition: left 0.45s cubic-bezier(0.34, 1.3, 0.64, 1);
      z-index: 5;
      user-select: none;
      cursor: pointer;
    }

    .milestones {
      display: flex;
      justify-content: space-between;
      width: 100%;
      position: relative;
    }

    .node-btn {
      background: none;
      border: none;
      cursor: pointer;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 5px;
      flex: 1;
      outline: none;
      color: inherit;
      padding: 4px;
      border-radius: 8px;
      transition: background-color 0.2s ease;
    }

    .node-btn:focus-visible {
      outline: 2px solid #22b7ff;
    }

    .node-dot {
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: #ffffff;
      border: 3px solid #cbd5e1;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      font-weight: 700;
      color: #ffffff;
    }

    .node-btn.active .node-dot {
      border-color: #10b981;
      background: #10b981;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
    }

    .node-time {
      font-size: 13px;
      font-weight: 700;
      color: #1e2945;
      transition: color 0.3s ease;
    }

    .node-label {
      font-size: 11px;
      font-weight: 600;
      color: #64748b;
      text-align: center;
      line-height: 1.2;
    }

    .node-btn.active .node-time {
      color: #10b981;
    }
    
    .node-btn.active .node-label {
      color: #1e2945;
    }

    /* Battery Row */
    .battery-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 10px 14px;
      background: #f1f5f9;
      border-radius: 12px;
    }

    .battery-label-group {
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .battery-title {
      font-size: 13px;
      font-weight: 700;
      color: #1e2945;
    }

    .battery-sub {
      font-size: 12px;
      font-weight: 600;
      color: #10b981;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .battery-unit {
      display: flex;
      align-items: center;
    }

    .battery-case {
      width: 72px;
      height: 28px;
      border: 2px solid #1e2945;
      border-radius: 6px;
      padding: 2px;
      display: flex;
      gap: 2px;
      background: #ffffff;
    }

    .battery-terminal {
      width: 4px;
      height: 12px;
      background: #1e2945;
      border-radius: 0 2px 2px 0;
    }

    .battery-cell {
      flex: 1;
      height: 100%;
      background: #e2e8f0;
      border-radius: 2px;
      transition: background-color 0.3s ease;
    }

    .battery-cell.lit {
      background: #10b981;
    }

    /* Controls */
    .controls {
      display: flex;
      justify-content: center;
      gap: 8px;
    }

    .ctrl-btn {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 20px;
      padding: 6px 16px;
      font-size: 13px;
      font-weight: 600;
      color: #1e2945;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: background-color 0.2s, border-color 0.2s;
    }

    .ctrl-btn:hover {
      background: #f8fafc;
      border-color: #94a3b8;
    }

    @media (max-width: 360px) {
      .title { font-size: 16px; }
      .node-time { font-size: 12px; }
      .node-label { font-size: 10px; }
      .battery-title { font-size: 12px; }
      .battery-sub { font-size: 11px; }
    }
  </style>
</head>
<body>
  <div class="main-stage">
    <div class="header">
      <div class="title">Building Reading Stamina</div>
      <div class="subtitle">Step by step to longer focus</div>
    </div>

    
    <div class="track-section">
      <div class="track-wrapper">
        <div class="track-line-bg"></div>
        <div class="track-line-fill" id="trackFill"></div>
        <div class="bookworm" id="worm" aria-label="Bookworm runner">🐛</div>
      </div>

      <div class="milestones">
        <button class="node-btn active" id="btn0" aria-label="5 Minutes Warm-up">
          <div class="node-dot">✓</div>
          <span class="node-time">5 Min</span>
          <span class="node-label">Warm-Up</span>
        </button>

        <button class="node-btn" id="btn1" aria-label="15 Minutes 1 Chapter">
          <div class="node-dot">✓</div>
          <span class="node-time">15 Min</span>
          <span class="node-label">1 Chapter</span>
        </button>

        <button class="node-btn" id="btn2" aria-label="25 Minutes Pro Stamina">
          <div class="node-dot">✓</div>
          <span class="node-time">25 Min</span>
          <span class="node-label">Pro Stamina</span>
        </button>
      </div>
    </div>

    
    <div class="battery-row">
      <div class="battery-label-group">
        <span class="battery-title">Focus Battery</span>
        <span class="battery-sub">⚡ Silent Focus Strategies</span>
      </div>

      <div class="battery-unit">
        <div class="battery-case">
          <div class="battery-cell lit" id="cell0"></div>
          <div class="battery-cell" id="cell1"></div>
          <div class="battery-cell" id="cell2"></div>
        </div>
        <div class="battery-terminal"></div>
      </div>
    </div>

    
    <div class="controls">
      <button class="ctrl-btn" id="playBtn">⏸ Pause</button>
    </div>
  </div>

  <script>
    const positions = [10, 50, 90];
    const fillWidths = [0, 50, 80];
    const nodes = [
      document.getElementById('btn0'),
      document.getElementById('btn1'),
      document.getElementById('btn2')
    ];
    const cells = [
      document.getElementById('cell0'),
      document.getElementById('cell1'),
      document.getElementById('cell2')
    ];
    const worm = document.getElementById('worm');
    const trackFill = document.getElementById('trackFill');
    const playBtn = document.getElementById('playBtn');

    let currentStep = 0;
    let playing = true;
    let timer = null;

    function renderStep(idx) {
      currentStep = idx;
      
      // Update worm & track
      if (worm) worm.style.left = positions[idx] + '%';
      if (trackFill) trackFill.style.width = fillWidths[idx] + '%';

      // Update milestone nodes
      nodes.forEach((node, i) => {
        if (node) {
          if (i <= idx) {
            node.classList.add('active');
          } else {
            node.classList.remove('active');
          }
        }
      });

      // Update battery cells
      cells.forEach((cell, i) => {
        if (cell) {
          if (i <= idx) {
            cell.classList.add('lit');
          } else {
            cell.classList.remove('lit');
          }
        }
      });
    }

    function nextStep() {
      const next = (currentStep + 1) % 3;
      renderStep(next);
    }

    function startAutoPlay() {
      if (timer) clearInterval(timer);
      timer = setInterval(nextStep, 3200);
      playing = true;
      if (playBtn) playBtn.textContent = '⏸ Pause';
    }

    function stopAutoPlay() {
      if (timer) clearInterval(timer);
      timer = null;
      playing = false;
      if (playBtn) playBtn.textContent = '▶ Play';
    }

    // Node click handlers
    nodes.forEach((btn, idx) => {
      if (btn) {
        btn.addEventListener('click', () => {
          renderStep(idx);
          stopAutoPlay();
        });
      }
    });

    // Play/Pause button
    if (playBtn) {
      playBtn.addEventListener('click', () => {
        if (playing) {
          stopAutoPlay();
        } else {
          nextStep();
          startAutoPlay();
        }
      });
    }

    // Initialize
    renderStep(0);
    startAutoPlay();
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <title>Chapter Check-In Card</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: #ffffff;
      padding: 14px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      min-height: 100%;
    }

    .header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 12px;
      padding: 0 4px;
    }

    .title {
      font-size: 14px;
      font-weight: 700;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      color: #64748b;
    }

    .status-badge {
      font-size: 12px;
      font-weight: 600;
      color: #0284c7;
      background: #e0f2fe;
      padding: 2px 8px;
      border-radius: 12px;
    }

    .cards-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .check-card {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 14px;
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 12px;
      cursor: pointer;
      transition: box-shadow 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
      user-select: none;
      -webkit-tap-highlight-color: transparent;
    }

    .check-card:hover {
      background-color: #f8fafc;
    }

    .check-card.active {
      border-color: #22b7ff;
      background-color: #f0f9ff;
      box-shadow: 0 0 0 2px rgba(34, 183, 255, 0.25), 0 4px 10px rgba(30, 41, 69, 0.05);
    }

    .icon-box {
      width: 40px;
      height: 40px;
      min-width: 40px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      background: #f1f5f9;
      transition: background-color 0.25s ease;
    }

    .check-card.active .icon-box {
      background: #ffffff;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
    }

    .content {
      flex: 1;
      min-width: 0;
    }

    .step-tag {
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.4px;
      color: #64748b;
      margin-bottom: 2px;
    }

    .check-card.active .step-tag {
      color: #0284c7;
    }

    .question {
      font-size: 14.5px;
      font-weight: 600;
      line-height: 1.3;
      color: #1e2945;
    }

    .indicator {
      width: 22px;
      height: 22px;
      min-width: 22px;
      border-radius: 50%;
      border: 1.5px solid #cbd5e1;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      color: #ffffff;
      transition: all 0.25s ease;
    }

    .check-card.active .indicator {
      background: #22b7ff;
      border-color: #22b7ff;
    }

    .footer {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      margin-top: 14px;
    }

    .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #cbd5e1;
      cursor: pointer;
      transition: background-color 0.25s ease, width 0.25s ease;
    }

    .dot.active {
      width: 20px;
      border-radius: 4px;
      background: #22b7ff;
    }
  </style>
</head>
<body>
  <div class="header">
    <span class="title">Chapter Check-In</span>
    <span class="status-badge" id="stepCounter">Step 1 of 3</span>
  </div>

  <div class="cards-list">
    <div class="check-card active" data-step="0">
      <div class="icon-box">🔍</div>
      <div class="content">
        <div class="step-tag">Step 1 • Characters</div>
        <div class="question">Who was in this chapter?</div>
      </div>
      <div class="indicator">✓</div>
    </div>

    <div class="check-card" data-step="1">
      <div class="icon-box">⚡</div>
      <div class="content">
        <div class="step-tag">Step 2 • Conflict</div>
        <div class="question">What new problem happened?</div>
      </div>
      <div class="indicator">✓</div>
    </div>

    <div class="check-card" data-step="2">
      <div class="icon-box">➔</div>
      <div class="content">
        <div class="step-tag">Step 3 • Plot Shift</div>
        <div class="question">How does this change the main goal?</div>
      </div>
      <div class="indicator">✓</div>
    </div>
  </div>

  <div class="footer">
    <div class="dot active" data-step="0"></div>
    <div class="dot" data-step="1"></div>
    <div class="dot" data-step="2"></div>
  </div>

  <script>
    const cards = document.querySelectorAll('.check-card');
    const dots = document.querySelectorAll('.dot');
    const stepCounter = document.getElementById('stepCounter');
    let currentStep = 0;
    let autoTimer = null;

    function setStep(index) {
      currentStep = index;
      cards.forEach((card, i) => {
        card.classList.toggle('active', i === index);
      });
      dots.forEach((dot, i) => {
        dot.classList.toggle('active', i === index);
      });
      stepCounter.textContent = `Step ${index + 1} of 3`;
    }

    function nextStep() {
      setStep((currentStep + 1) % cards.length);
    }

    function startAutoCycle() {
      clearInterval(autoTimer);
      autoTimer = setInterval(nextStep, 3500);
    }

    cards.forEach((card, index) => {
      card.addEventListener('click', () => {
        setStep(index);
        startAutoCycle();
      });
    });

    dots.forEach((dot, index) => {
      dot.addEventListener('click', () => {
        setStep(index);
        startAutoCycle();
      });
    });

    startAutoCycle();
  </script>
</body>
</html>

OGE.3.RL.9

Aligned learning resources

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