<!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: #1e2945;
      padding: 10px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      min-height: 100%;
    }

    .grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      width: 100%;
    }

    @media (max-width: 520px) {
      .grid {
        grid-template-columns: 1fr;
      }
    }

    .mode-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 12px 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      cursor: pointer;
      transition: border-color 0.25s ease, box-shadow 0.25s ease;
      position: relative;
    }

    .mode-card:hover, .mode-card.active {
      border-color: #22b7ff;
      box-shadow: 0 4px 12px rgba(34, 183, 255, 0.15);
    }

    .pill {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      padding: 3px 10px;
      border-radius: 20px;
      margin-bottom: 12px;
    }

    .pill-blue { background: #e0f2fe; color: #0284c7; }
    .pill-purple { background: #f3e8ff; color: #7e22ce; }
    .pill-amber { background: #fef3c7; color: #b45309; }

    .stream {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      width: 100%;
      min-height: 110px;
      justify-content: center;
    }

    .icon-row {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      font-size: 20px;
    }

    .feed-item {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 4px 8px;
      font-size: 12px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .operator {
      font-size: 14px;
      font-weight: 800;
      color: #94a3b8;
    }

    .arrow {
      color: #94a3b8;
      font-size: 16px;
      margin: 8px 0 6px;
      line-height: 1;
    }

    .outcome {
      width: 100%;
      border-radius: 8px;
      padding: 8px 6px;
      font-size: 13px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
    }

    .out-blue { background: #f0f9ff; color: #0369a1; border: 1px dashed #7dd3fc; }
    .out-purple { background: #faf5ff; color: #6b21a8; border: 1px dashed #d8b4fe; }
    .out-amber { background: #fffbeb; color: #92400e; border: 1px dashed #fcd34d; }

    .vs-tag {
      font-size: 11px;
      font-weight: 800;
      color: #ef4444;
      background: #fee2e2;
      padding: 1px 5px;
      border-radius: 4px;
    }
  </style>
</head>
<body>

  <div class="grid">
    
    <div class="mode-card active" onclick="selectCard(this)">
      <span class="pill pill-blue">Anchorage</span>
      <div class="stream">
        <div class="feed-item">👥 <i>Image</i></div>
        <span class="operator">+</span>
        <div class="feed-item" style="color:#0284c7;">📌 "Protest"</div>
      </div>
      <div class="arrow">↓</div>
      <div class="outcome out-blue">
        🎯 Pinned Meaning
      </div>
    </div>

    
    <div class="mode-card" onclick="selectCard(this)">
      <span class="pill pill-purple">Synergy</span>
      <div class="stream">
        <div class="icon-row">
          <span>😭</span>
          <span class="operator">+</span>
          <span>🎵</span>
          <span class="operator">+</span>
          <span>🌧️</span>
        </div>
        <div class="feed-item" style="color:#7e22ce;">🖤 "Heartbroken"</div>
      </div>
      <div class="arrow">↓</div>
      <div class="outcome out-purple">
        ⚡ High Grief
      </div>
    </div>

    
    <div class="mode-card" onclick="selectCard(this)">
      <span class="pill pill-amber">Dissonance</span>
      <div class="stream">
        <div class="feed-item">💃 Upbeat Dance</div>
        <span class="vs-tag">CLASH</span>
        <div class="feed-item" style="color:#b45309;">❌ "Failed Exam"</div>
      </div>
      <div class="arrow">↓</div>
      <div class="outcome out-amber">
        🎭 Irony &amp; Satire
      </div>
    </div>
  </div>

  <script>
    function selectCard(card) {
      document.querySelectorAll('.mode-card').forEach(c => c.classList.remove('active'));
      card.classList.add('active');
    }
  </script>
</body>
</html>

Analysing Digital Media as Multimodal Texts

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Multimodal Ad Analysis Timeline</title>
  <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: 8px 10px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .header-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 6px;
    }

    .title-text {
      font-weight: 700;
      font-size: 13px;
      color: #0f172a;
    }

    .time-badge {
      font-size: 12px;
      font-weight: 700;
      background: #e0e7ff;
      padding: 2px 7px;
      border-radius: 4px;
      color: #3730a3;
      font-variant-numeric: tabular-nums;
    }

    .controls {
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .ctrl-btn {
      border: 1px solid #cbd5e1;
      background: #ffffff;
      border-radius: 5px;
      padding: 3px 8px;
      font-size: 11px;
      font-weight: 600;
      cursor: pointer;
      color: #334155;
      display: inline-flex;
      align-items: center;
      gap: 3px;
      transition: background 0.15s, border-color 0.15s;
    }
    .ctrl-btn:hover { background: #f1f5f9; border-color: #94a3b8; }
    .ctrl-btn:active { background: #e2e8f0; }

    /* Timeline container - no outer border card */
    .timeline-wrap {
      position: relative;
      display: flex;
      flex-direction: column;
      gap: 4px;
      padding: 2px 0;
    }

    /* Time Axis Ruler */
    .time-ruler {
      display: flex;
      justify-content: space-between;
      margin-left: 68px;
      font-size: 10px;
      font-weight: 600;
      color: #64748b;
      padding: 0 2px;
      user-select: none;
    }

    .track-row {
      display: flex;
      align-items: center;
      position: relative;
      height: 34px;
      gap: 6px;
    }

    .track-label {
      width: 62px;
      font-size: 10px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.2px;
      color: #475569;
      display: flex;
      align-items: center;
      gap: 3px;
      flex-shrink: 0;
      line-height: 1.1;
    }

    .track-lane {
      flex: 1;
      position: relative;
      height: 100%;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 5px;
      overflow: hidden;
    }

    .event-block {
      position: absolute;
      top: 2px;
      bottom: 2px;
      border-radius: 3px;
      font-size: clamp(8px, 1.8vw, 10.5px);
      font-weight: 600;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      line-height: 1.1;
      padding: 0 2px;
      word-break: normal;
      overflow: hidden;
      border: 1px solid transparent;
      transition: box-shadow 0.15s, background-color 0.15s, font-weight 0.15s;
      cursor: pointer;
    }

    /* Colors per mode */
    .t-ling { background: #e0e7ff; color: #3730a3; border-color: #c7d2fe; }
    .t-vis  { background: #ecfdf5; color: #065f46; border-color: #a7f3d0; }
    .t-aud  { background: #fef3c7; color: #92400e; border-color: #fde68a; }
    .t-ges  { background: #fce7f3; color: #9d174d; border-color: #fbcfe8; }
    .t-spa  { background: #f1f5f9; color: #334155; border-color: #cbd5e1; }

    .event-block.active-event {
      box-shadow: 0 0 0 2px #2563eb;
      font-weight: 700;
      z-index: 2;
    }

    /* Playhead needle */
    .playhead-needle {
      position: absolute;
      top: 16px;
      bottom: 26px;
      width: 2px;
      background: #2563eb;
      z-index: 10;
      pointer-events: none;
      transform: translateX(-50%);
    }
    .playhead-needle::before {
      content: '';
      position: absolute;
      top: -3px;
      left: -3px;
      width: 8px;
      height: 8px;
      background: #2563eb;
      border-radius: 50%;
    }

    /* Interactive scrubber range input */
    .scrubber-wrap {
      margin-left: 68px;
      margin-top: 2px;
      display: flex;
      align-items: center;
    }

    .scrubber-slider {
      width: 100%;
      accent-color: #2563eb;
      cursor: pointer;
      height: 4px;
    }

    /* Synthesis bracket / summary container */
    .synthesis-card {
      display: flex;
      align-items: center;
      background: #f0f7ff;
      border-left: 3px solid #2563eb;
      border-radius: 4px;
      padding: 6px 10px;
      gap: 6px;
      margin-top: 2px;
    }

    .synth-bracket {
      font-size: 18px;
      color: #2563eb;
      font-weight: 400;
      line-height: 1;
    }

    .synth-text {
      font-size: 11.5px;
      color: #1e3a8a;
      line-height: 1.3;
    }
    .synth-highlight {
      color: #2563eb;
      font-weight: 700;
    }

    @media (max-width: 380px) {
      .track-label {
        width: 54px;
        font-size: 9px;
      }
      .time-ruler, .scrubber-wrap {
        margin-left: 60px;
      }
      .event-block {
        font-size: 8px;
        padding: 0 1px;
      }
      .synth-text {
        font-size: 10.5px;
      }
      .title-text {
        font-size: 12px;
      }
    }
  </style>
</head>
<body>

  <div class="header-bar">
    <div style="display:flex; align-items:center; gap:6px;">
      <span class="title-text">Multimodal Ad Timeline</span>
      <span id="timeDisplay" class="time-badge">0:00 / 0:10</span>
    </div>
    <div class="controls">
      <button class="ctrl-btn" id="playBtn" aria-label="Play or pause">▶ Play</button>
      <button class="ctrl-btn" onclick="seek(0)">0s</button>
      <button class="ctrl-btn" onclick="seek(3)">3s</button>
      <button class="ctrl-btn" onclick="seek(8)">8s</button>
    </div>
  </div>

  <div class="timeline-wrap" id="timelineContainer">
    <div class="time-ruler">
      <span>0:00</span>
      <span>0:02</span>
      <span>0:04</span>
      <span>0:06</span>
      <span>0:08</span>
      <span>0:10</span>
    </div>

    
    <div id="playhead" class="playhead-needle"></div>

    
    <div class="track-row">
      <div class="track-label">🔤 Ling.</div>
      <div class="track-lane">
        <div class="event-block t-ling" style="left: 30%; width: 35%;" data-start="3" data-end="6.5" onclick="seek(3)">"Zero Emissions"</div>
        <div class="event-block t-ling" style="left: 79%; width: 20%;" data-start="8" data-end="10" onclick="seek(8)">"Tap to customize"</div>
      </div>
    </div>

    
    <div class="track-row">
      <div class="track-label">👁️ Visual</div>
      <div class="track-lane">
        <div class="event-block t-vis" style="left: 0%; width: 49%;" data-start="0" data-end="5" onclick="seek(0)">4K Alpine Landscape</div>
        <div class="event-block t-vis" style="left: 50%; width: 49%;" data-start="5" data-end="10" onclick="seek(5)">Metallic Cockpit</div>
      </div>
    </div>

    
    <div class="track-row">
      <div class="track-label">🎵 Audio</div>
      <div class="track-lane">
        <div class="event-block t-aud" style="left: 0%; width: 39%;" data-start="0" data-end="4" onclick="seek(0)">Synth (60 BPM)</div>
        <div class="event-block t-aud" style="left: 40%; width: 39%;" data-start="4" data-end="8" onclick="seek(4)">Engine Whoosh</div>
        <div class="event-block t-aud" style="left: 80%; width: 19%;" data-start="8" data-end="10" onclick="seek(8)">UI Chime</div>
      </div>
    </div>

    
    <div class="track-row">
      <div class="track-label">🤝 Gest.</div>
      <div class="track-lane">
        <div class="event-block t-ges" style="left: 0%; width: 99%;" data-start="0" data-end="10" onclick="seek(0)">Calm driver grip on wheel, subtle smile</div>
      </div>
    </div>

    
    <div class="track-row">
      <div class="track-label">📐 Spatial</div>
      <div class="track-lane">
        <div class="event-block t-spa" style="left: 0%; width: 69%;" data-start="0" data-end="7" onclick="seek(0)">Vehicle centered (high focus)</div>
        <div class="event-block t-spa" style="left: 70%; width: 29%;" data-start="7" data-end="10" onclick="seek(7)">Thumb-Reach UI</div>
      </div>
    </div>

    <div class="scrubber-wrap">
      <input type="range" id="timeSlider" class="scrubber-slider" min="0" max="10" step="0.1" value="0" aria-label="Timeline scrubber">
    </div>
  </div>

  
  <div class="synthesis-card">
    <div class="synth-bracket">}</div>
    <div class="synth-text">
      <strong>Composite Meaning:</strong> <span class="synth-highlight">Eco-friendly luxury without eco-anxiety</span>
    </div>
  </div>

  <script>
    let currentTime = 0;
    let isPlaying = false;
    let animTimer = null;

    const playBtn = document.getElementById('playBtn');
    const timeSlider = document.getElementById('timeSlider');
    const timeDisplay = document.getElementById('timeDisplay');
    const playhead = document.getElementById('playhead');
    const events = document.querySelectorAll('.event-block');
    const firstLane = document.querySelector('.track-lane');

    function updateTime(t) {
      currentTime = Math.min(10, Math.max(0, t));
      timeSlider.value = currentTime;
      
      const secs = Math.floor(currentTime);
      const frac = Math.floor((currentTime % 1) * 10);
      timeDisplay.textContent = `0:${secs < 10 ? '0' : ''}${secs} / 0:10`;

      // Position playhead dynamically relative to track lanes
      if (firstLane) {
        const laneOffset = firstLane.offsetLeft;
        const laneWidth = firstLane.offsetWidth;
        const leftPx = laneOffset + (currentTime / 10) * laneWidth;
        playhead.style.left = `${leftPx}px`;
      }

      // Highlight active mode blocks
      events.forEach(el => {
        const start = parseFloat(el.getAttribute('data-start'));
        const end = parseFloat(el.getAttribute('data-end'));
        if (currentTime >= start && currentTime <= end) {
          el.classList.add('active-event');
        } else {
          el.classList.remove('active-event');
        }
      });
    }

    function togglePlay() {
      isPlaying = !isPlaying;
      playBtn.textContent = isPlaying ? '⏸ Pause' : '▶ Play';
      if (isPlaying) {
        if (currentTime >= 10) currentTime = 0;
        let lastTimestamp = performance.now();
        function loop(now) {
          if (!isPlaying) return;
          const dt = (now - lastTimestamp) / 1000;
          lastTimestamp = now;
          currentTime += dt;
          if (currentTime >= 10) {
            updateTime(10);
            isPlaying = false;
            playBtn.textContent = '▶ Play';
            return;
          }
          updateTime(currentTime);
          animTimer = requestAnimationFrame(loop);
        }
        animTimer = requestAnimationFrame(loop);
      } else {
        cancelAnimationFrame(animTimer);
      }
    }

    function seek(t) {
      if (isPlaying) togglePlay();
      updateTime(t);
    }

    playBtn.addEventListener('click', togglePlay);
    timeSlider.addEventListener('input', (e) => seek(parseFloat(e.target.value)));
    window.addEventListener('resize', () => updateTime(currentTime));

    // Initial render
    updateTime(0);
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Semiotic Modes & Composite Digital Meaning</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #ffffff;
      color: #1e2945;
      width: 100%;
      min-height: 100%;
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 10px;
      user-select: none;
    }

    .multimodal-diagram {
      width: 100%;
      max-width: 680px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
    }

    /* Header */
    .header-bar {
      text-align: center;
    }

    .header-title {
      font-size: 15px;
      font-weight: 800;
      color: #1e2945;
      letter-spacing: -0.2px;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
    }

    .header-title .tag {
      font-size: 11px;
      font-weight: 700;
      background: #e2e8f0;
      color: #334155;
      padding: 2px 8px;
      border-radius: 12px;
    }

    /* Main Pentagonal / Surrounding Grid */
    .layout-grid {
      width: 100%;
      display: grid;
      grid-template-columns: 1fr 190px 1fr;
      grid-template-rows: auto auto auto;
      gap: 10px;
      align-items: center;
    }

    /* Mode Cards */
    .mode-card {
      background: #f8fafc;
      border: 1.5px solid #e6e6e6;
      border-radius: 10px;
      padding: 8px 10px;
      cursor: pointer;
      text-align: left;
      display: flex;
      flex-direction: column;
      gap: 3px;
      transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
      outline: none;
    }

    .mode-card:focus-visible {
      outline: 2px solid #2563eb;
    }

    .mode-card-header {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .mode-icon {
      font-size: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 22px;
      height: 22px;
      border-radius: 6px;
      background: #ffffff;
      box-shadow: 0 1px 3px rgba(0,0,0,0.08);
      flex-shrink: 0;
    }

    .mode-name {
      font-size: 12px;
      font-weight: 700;
      letter-spacing: -0.1px;
    }

    .mode-desc {
      font-size: 10.5px;
      line-height: 1.35;
      color: #475569;
      font-weight: 500;
    }

    /* Mode-Specific Color Accents */
    .mode-card[data-mode="linguistic"] { --accent: #2563eb; --accent-bg: #eff6ff; }
    .mode-card[data-mode="visual"]     { --accent: #7c3aed; --accent-bg: #f5f3ff; }
    .mode-card[data-mode="audio"]      { --accent: #059669; --accent-bg: #ecfdf5; }
    .mode-card[data-mode="gestural"]   { --accent: #d97706; --accent-bg: #fffbeb; }
    .mode-card[data-mode="spatial"]    { --accent: #e11d48; --accent-bg: #fff1f2; }

    .mode-card .mode-name {
      color: var(--accent);
    }

    .mode-card:hover {
      background: var(--accent-bg);
      border-color: var(--accent);
    }

    .mode-card.active {
      background: var(--accent-bg);
      border-color: var(--accent);
      box-shadow: 0 0 0 2px var(--accent);
    }

    .mode-card.active .mode-name {
      color: var(--accent);
      font-weight: 800;
    }

    .mode-card.active .mode-desc {
      color: #1e293b;
      font-weight: 600;
    }

    /* Specific Grid Placements */
    .card-linguistic { grid-column: 1; grid-row: 1; }
    .card-visual     { grid-column: 1; grid-row: 2; }
    .card-audio      { grid-column: 3; grid-row: 1; }
    .card-gestural   { grid-column: 3; grid-row: 2; }
    .card-spatial    { grid-column: 1 / span 3; justify-self: center; width: 100%; max-width: 380px; }

    /* Center Stage / Mockup */
    .center-stage-wrapper {
      grid-column: 2;
      grid-row: 1 / span 2;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
    }

    .stage {
      position: relative;
      width: 190px;
      height: 250px;
      background: #090d16;
      border-radius: 18px;
      border: 3px solid #1e2945;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: 0 8px 20px rgba(30, 41, 69, 0.15);
    }

    /* Screen Elements with Solid Contrast */
    .screen-bg {
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 50% 35%, #2e1065 0%, #090d16 85%);
      transition: opacity 0.4s ease;
    }

    .screen-bg.highlight-visual {
      background: radial-gradient(circle at 50% 35%, #581c87 0%, #1e1b4b 100%);
    }

    /* Visual vectors overlay inside screen */
    .screen-vector-overlay {
      position: absolute;
      inset: 0;
      border: 1px dashed rgba(167, 139, 250, 0.4);
      margin: 8px;
      border-radius: 10px;
      pointer-events: none;
      transition: border-color 0.3s ease;
    }

    .stage.mode-visual-active .screen-vector-overlay {
      border-color: rgba(196, 181, 253, 0.95);
      background: rgba(124, 58, 237, 0.12);
    }

    /* Audio Badge */
    .audio-badge {
      position: absolute;
      top: 10px;
      left: 10px;
      background: #047857;
      color: #ffffff;
      padding: 3px 8px;
      border-radius: 10px;
      font-size: 10px;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 5px;
      z-index: 5;
      border: 1px solid #10b981;
      box-shadow: 0 2px 5px rgba(0,0,0,0.5);
      transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .stage.mode-audio-active .audio-badge {
      background: #059669;
      border-color: #34d399;
      box-shadow: 0 0 10px rgba(52, 211, 153, 0.6);
    }

    .sound-bars {
      display: flex;
      align-items: flex-end;
      gap: 2px;
      height: 9px;
    }

    .sound-bar {
      width: 2px;
      background: #ffffff;
      border-radius: 1px;
      animation: soundWave 0.7s infinite alternate ease-in-out;
    }
    .sound-bar:nth-child(1) { height: 4px; }
    .sound-bar:nth-child(2) { height: 8px; animation-delay: 0.15s; }
    .sound-bar:nth-child(3) { height: 6px; animation-delay: 0.3s; }

    @keyframes soundWave {
      0% { height: 3px; }
      100% { height: 9px; }
    }

    /* Gestural Creator Figure */
    .gestural-container {
      position: absolute;
      top: 48px;
      left: 0;
      right: 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      z-index: 4;
      transition: opacity 0.3s ease;
    }

    .gestural-avatar {
      font-size: 46px;
      line-height: 1;
      filter: drop-shadow(0 3px 6px rgba(0,0,0,0.6));
    }

    .gestural-cue {
      font-size: 9px;
      font-weight: 800;
      color: #ffffff;
      background: #d97706;
      border: 1px solid #fde68a;
      border-radius: 6px;
      padding: 1px 5px;
      margin-top: 2px;
      box-shadow: 0 2px 4px rgba(0,0,0,0.4);
      transition: background 0.3s ease;
    }

    .stage.mode-gestural-active .gestural-cue {
      background: #b45309;
      box-shadow: 0 0 8px rgba(245, 158, 11, 0.8);
    }

    /* Spatial Layer: UI Actions on Right */
    .spatial-ui {
      position: absolute;
      right: 10px;
      top: 60px;
      display: flex;
      flex-direction: column;
      gap: 6px;
      z-index: 5;
    }

    .ui-action {
      width: 26px;
      height: 26px;
      border-radius: 50%;
      background: #e11d48;
      border: 1px solid #fda4af;
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      font-weight: bold;
      box-shadow: 0 2px 5px rgba(0,0,0,0.4);
      transition: background-color 0.3s ease, box-shadow 0.3s ease;
    }

    .stage.mode-spatial-active .ui-action {
      background: #be123c;
      border-color: #ffe4e6;
      box-shadow: 0 0 8px rgba(244, 63, 94, 0.8);
    }

    /* Linguistic Layer: Subtitle bar */
    .linguistic-box {
      position: absolute;
      bottom: 10px;
      left: 10px;
      right: 10px;
      background: #1d4ed8;
      border: 1px solid #93c5fd;
      color: #ffffff;
      font-size: 10px;
      font-weight: 700;
      line-height: 1.3;
      text-align: center;
      padding: 5px 6px;
      border-radius: 6px;
      z-index: 6;
      box-shadow: 0 2px 6px rgba(0,0,0,0.4);
      transition: background-color 0.3s ease, box-shadow 0.3s ease;
    }

    .stage.mode-linguistic-active .linguistic-box {
      background: #2563eb;
      border-color: #bfdbfe;
      box-shadow: 0 0 10px rgba(59, 130, 246, 0.8);
    }

    /* Central Meaning Badge */
    .center-label {
      font-size: 11px;
      font-weight: 800;
      color: #ffffff;
      background: #1e2945;
      padding: 4px 10px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      gap: 5px;
      box-shadow: 0 2px 6px rgba(30, 41, 69, 0.2);
    }

    .center-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: #38bdf8;
    }

    /* Responsive adjustments for narrow viewports */
    @media (max-width: 520px) {
      .layout-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto auto auto;
        gap: 8px;
      }

      .center-stage-wrapper {
        grid-column: 1 / span 2;
        grid-row: 1;
        margin-bottom: 4px;
      }

      .stage {
        width: 170px;
        height: 220px;
      }

      .card-linguistic { grid-column: 1; grid-row: 2; }
      .card-visual     { grid-column: 2; grid-row: 2; }
      .card-audio      { grid-column: 1; grid-row: 3; }
      .card-gestural   { grid-column: 2; grid-row: 3; }
      .card-spatial    { grid-column: 1 / span 2; grid-row: 4; max-width: 100%; }
    }
  </style>
</head>
<body>

  <div class="multimodal-diagram">
    <div class="header-bar">
      <div class="header-title">
        <span>Multimodal Semiotic Framework</span>
        <span class="tag">5 Modes</span>
      </div>
    </div>

    
    <div class="layout-grid">
      
      
      <button type="button" class="mode-card card-linguistic active" data-mode="linguistic" aria-label="Linguistic mode">
        <div class="mode-card-header">
          <span class="mode-icon">💬</span>
          <span class="mode-name">1. Linguistic</span>
        </div>
        <div class="mode-desc">Vocabulary, syntax, subtitles & captions</div>
      </button>

      
      <button type="button" class="mode-card card-visual" data-mode="visual" aria-label="Visual mode">
        <div class="mode-card-header">
          <span class="mode-icon">🎨</span>
          <span class="mode-name">2. Visual</span>
        </div>
        <div class="mode-desc">Color palette, framing, vectors & filters</div>
      </button>

      
      <div class="center-stage-wrapper">
        <div class="stage mode-linguistic-active" id="screenStage" role="img" aria-label="Device mockup illustrating composite meaning">
          
          <div class="screen-bg" id="screenBg"></div>
          <div class="screen-vector-overlay"></div>

          
          <div class="audio-badge" id="audioBadge">
            <span>🔊 BGM (Upbeat)</span>
            <div class="sound-bars" aria-hidden="true">
              <div class="sound-bar"></div>
              <div class="sound-bar"></div>
              <div class="sound-bar"></div>
            </div>
          </div>

          
          <div class="gestural-container">
            <div class="gestural-avatar">🙋‍♂️</div>
            <div class="gestural-cue">Eye contact • Direct Pose</div>
          </div>

          
          <div class="spatial-ui" aria-hidden="true">
            <div class="ui-action">♥</div>
            <div class="ui-action">💬</div>
            <div class="ui-action">↗</div>
          </div>

          
          <div class="linguistic-box" id="linguisticBox">
            "Record melting observed in arctic ice shelves"
          </div>
        </div>

        <div class="center-label">
          <span class="center-dot"></span>
          Composite Digital Meaning
        </div>
      </div>

      
      <button type="button" class="mode-card card-audio" data-mode="audio" aria-label="Audio mode">
        <div class="mode-card-header">
          <span class="mode-icon">🔊</span>
          <span class="mode-name">3. Audio</span>
        </div>
        <div class="mode-desc">BGM, sound effects, vocal tone & tempo</div>
      </button>

      
      <button type="button" class="mode-card card-gestural" data-mode="gestural" aria-label="Gestural mode">
        <div class="mode-card-header">
          <span class="mode-icon">🕺</span>
          <span class="mode-name">4. Gestural</span>
        </div>
        <div class="mode-desc">Eye contact, micro-expressions & body pose</div>
      </button>

      
      <button type="button" class="mode-card card-spatial" data-mode="spatial" aria-label="Spatial mode">
        <div class="mode-card-header">
          <span class="mode-icon">⛶</span>
          <span class="mode-name">5. Spatial</span>
        </div>
        <div class="mode-desc">UI visual hierarchy, margins, proximity & tap targets</div>
      </button>

    </div>
  </div>

  <script>
    const cards = document.querySelectorAll('.mode-card');
    const stage = document.getElementById('screenStage');
    const screenBg = document.getElementById('screenBg');
    const modes = ['linguistic', 'visual', 'audio', 'gestural', 'spatial'];

    let activeMode = 'linguistic';
    let switchLockTimeout = null;

    function applyMode(mode) {
      if (activeMode === mode) return;
      activeMode = mode;

      // Update card states
      cards.forEach(card => {
        card.classList.toggle('active', card.dataset.mode === mode);
      });

      // Clear existing stage mode classes
      modes.forEach(m => stage.classList.remove(`mode-${m}-active`));
      stage.classList.add(`mode-${mode}-active`);

      // Update background highlight if visual mode
      if (mode === 'visual') {
        screenBg.classList.add('highlight-visual');
      } else {
        screenBg.classList.remove('highlight-visual');
      }
    }

    // Attach stable interaction listeners (guarantee minimum visible dwell time)
    cards.forEach(card => {
      const mode = card.dataset.mode;
      
      const trigger = () => {
        applyMode(mode);
      };

      card.addEventListener('click', trigger);
      card.addEventListener('mouseenter', () => {
        clearTimeout(switchLockTimeout);
        switchLockTimeout = setTimeout(trigger, 50);
      });
      card.addEventListener('focus', trigger);
    });
  </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; -webkit-tap-highlight-color: transparent; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #0f172a;
      color: #f8fafc;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 12px;
      gap: 10px;
      user-select: none;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: 440px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    /* Video Scene & Waveform Container */
    .viewport {
      width: 100%;
      aspect-ratio: 16 / 10;
      position: relative;
      border-radius: 10px;
      overflow: hidden;
      background: #020617;
      border: 1px solid #1e293b;
      box-shadow: inset 0 0 40px rgba(0,0,0,0.8);
      display: flex;
      flex-direction: column;
    }

    canvas#sceneCanvas {
      width: 100%;
      height: 100%;
      display: block;
    }

    /* Analytical Narrative Badge */
    .badge-overlay {
      position: absolute;
      top: 8px;
      left: 8px;
      right: 8px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      pointer-events: none;
      z-index: 10;
    }

    .badge {
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.4px;
      text-transform: uppercase;
      padding: 4px 10px;
      border-radius: 20px;
      backdrop-filter: blur(8px);
      transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
    }

    .badge-foley {
      background: rgba(15, 23, 42, 0.85);
      border: 1px solid #94a3b8;
      color: #f1f5f9;
    }

    .badge-drone {
      background: rgba(69, 10, 10, 0.85);
      border: 1px solid #ef4444;
      color: #fecaca;
      box-shadow: 0 0 10px rgba(239, 68, 68, 0.4);
    }

    .badge-synth {
      background: rgba(8, 47, 73, 0.85);
      border: 1px solid #38bdf8;
      color: #e0f2fe;
      box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
    }

    .status-tag {
      font-size: 11px;
      font-weight: 600;
      background: rgba(2, 6, 23, 0.85);
      border: 1px solid #334155;
      padding: 4px 8px;
      border-radius: 6px;
      color: #cbd5e1;
    }

    /* Waveform Bar inside viewport */
    .wave-box {
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 38px;
      background: linear-gradient(to top, rgba(2, 6, 23, 0.95), transparent);
      pointer-events: none;
    }
    canvas#waveCanvas {
      width: 100%;
      height: 100%;
      display: block;
    }

    /* Interactive Audio Channels */
    .controls {
      width: 100%;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 8px;
    }

    .channel-btn {
      background: #1e293b;
      border: 2px solid #334155;
      border-radius: 10px;
      padding: 8px 4px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 3px;
      cursor: pointer;
      color: #94a3b8;
      transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
      outline: none;
    }

    .channel-btn:hover {
      background: #273549;
    }

    .channel-btn .icon {
      font-size: 18px;
      line-height: 1;
    }

    .channel-btn .title {
      font-size: 12px;
      font-weight: 700;
      color: #f8fafc;
    }

    .channel-btn .meta {
      font-size: 10px;
      font-weight: 600;
      color: #94a3b8;
      letter-spacing: 0.2px;
      transition: color 0.2s ease;
    }

    /* Active Mode Highlights */
    .channel-btn[data-mode="0"].active {
      border-color: #94a3b8;
      background: #334155;
      box-shadow: 0 0 10px rgba(148, 163, 184, 0.25);
    }
    .channel-btn[data-mode="0"].active .meta {
      color: #e2e8f0;
    }

    .channel-btn[data-mode="1"].active {
      border-color: #ef4444;
      background: #450a0a;
      box-shadow: 0 0 10px rgba(239, 68, 68, 0.3);
    }
    .channel-btn[data-mode="1"].active .title {
      color: #fee2e2;
    }
    .channel-btn[data-mode="1"].active .meta {
      color: #fca5a5;
    }

    .channel-btn[data-mode="2"].active {
      border-color: #38bdf8;
      background: #082f49;
      box-shadow: 0 0 10px rgba(56, 189, 248, 0.3);
    }
    .channel-btn[data-mode="2"].active .title {
      color: #f0f9ff;
    }
    .channel-btn[data-mode="2"].active .meta {
      color: #7dd3fc;
    }

    /* Narrative Meaning Explanation Card */
    .semiotic-insight {
      background: #111e33;
      border: 1px solid #1e293b;
      border-radius: 8px;
      padding: 8px 12px;
      font-size: 11px;
      line-height: 1.4;
      color: #cbd5e1;
      display: flex;
      gap: 6px;
      align-items: flex-start;
    }
    .semiotic-insight strong {
      color: #f8fafc;
      white-space: nowrap;
    }
    .semiotic-insight span {
      color: #94a3b8;
    }
  </style>
</head>
<body>

  <div class="container">
    
    <div class="viewport">
      <canvas id="sceneCanvas"></canvas>
      
      <div class="badge-overlay">
        <span id="meaningBadge" class="badge badge-foley">Realism • Isolation</span>
        <span id="soundStatus" class="status-tag">🔇 Tap Track</span>
      </div>

      <div class="wave-box">
        <canvas id="waveCanvas"></canvas>
      </div>
    </div>

    
    <div class="controls">
      <button class="channel-btn active" data-mode="0" onclick="switchTrack(0)">
        <span class="icon">🦶</span>
        <span class="title">Foley</span>
        <span class="meta">Diegetic</span>
      </button>
      <button class="channel-btn" data-mode="1" onclick="switchTrack(1)">
        <span class="icon">⚡</span>
        <span class="title">Drone</span>
        <span class="meta">Non-Diegetic</span>
      </button>
      <button class="channel-btn" data-mode="2" onclick="switchTrack(2)">
        <span class="icon">✨</span>
        <span class="title">Upbeat</span>
        <span class="meta">Non-Diegetic</span>
      </button>
    </div>

    
    <div class="semiotic-insight">
      <strong>Semiotics:</strong>
      <span id="insightText">Hollow acoustic footsteps ground the visual in stark documentary reality, framing the lone subject in isolation.</span>
    </div>
  </div>

  <script>
    // Canvas Setup
    const sceneCanvas = document.getElementById('sceneCanvas');
    const sceneCtx = sceneCanvas.getContext('2d');
    const waveCanvas = document.getElementById('waveCanvas');
    const waveCtx = waveCanvas.getContext('2d');

    function resize() {
      const dpr = window.devicePixelRatio || 1;
      const vp = sceneCanvas.parentElement;
      if (!vp) return;
      sceneCanvas.width = vp.clientWidth * dpr;
      sceneCanvas.height = vp.clientHeight * dpr;
      waveCanvas.width = vp.clientWidth * dpr;
      waveCanvas.height = waveCanvas.parentElement.clientHeight * dpr;
    }
    window.addEventListener('resize', resize);
    resize();

    // Visual Corridor & Walking Silhouette Loop
    let t = 0;
    let currentMode = 0;

    function drawCorridor(ctx, w, h, mood) {
      ctx.clearRect(0, 0, w, h);
      
      // Vanishing point
      const vx = w * 0.5;
      const vy = h * 0.46;

      // Ambience background tint
      let wallColor1 = '#090d16', wallColor2 = '#020617', lightColor = '#38bdf8';
      if (mood === 1) { // Suspense
        wallColor1 = '#1a0505'; wallColor2 = '#080101'; lightColor = '#ef4444';
      } else if (mood === 2) { // Upbeat
        wallColor1 = '#082f49'; wallColor2 = '#031726'; lightColor = '#38bdf8';
      }

      // Walls perspective
      const grad = ctx.createRadialGradient(vx, vy, 10, vx, vy, w * 0.75);
      grad.addColorStop(0, wallColor1);
      grad.addColorStop(1, wallColor2);
      ctx.fillStyle = grad;
      ctx.fillRect(0, 0, w, h);

      // Floor & Ceiling Perspective lines
      ctx.strokeStyle = 'rgba(255,255,255,0.08)';
      ctx.lineWidth = 1.5;
      const lines = [
        [0, 0], [w, 0], [0, h], [w, h],
        [w * 0.25, h], [w * 0.75, h], [0, h * 0.7], [w, h * 0.7]
      ];
      lines.forEach(([lx, ly]) => {
        ctx.beginPath();
        ctx.moveTo(vx, vy);
        ctx.lineTo(lx, ly);
        ctx.stroke();
      });

      // Distant light doorway
      const doorW = w * 0.08;
      const doorH = h * 0.28;
      ctx.fillStyle = lightColor;
      ctx.shadowColor = lightColor;
      ctx.shadowBlur = mood === 1 ? 20 : 12;
      ctx.fillRect(vx - doorW/2, vy - doorH/2, doorW, doorH);
      ctx.shadowBlur = 0;

      // Figure Walking Animation (Smooth looped perspective walk)
      const cycle = (t * 0.02) % 1;
      const scale = 0.5 + cycle * 0.65;
      const figX = vx + Math.sin(t * 0.05) * 3 * scale;
      const figY = vy + (h * 0.42) * cycle;
      const figH = h * 0.35 * scale;
      const figW = figH * 0.32;

      // Figure bobbing & stride
      const bob = Math.abs(Math.sin(t * 0.1)) * 3 * scale;
      const stride = Math.sin(t * 0.1) * 5 * scale;

      ctx.fillStyle = '#020617';
      // Head
      ctx.beginPath();
      ctx.arc(figX, figY - figH + bob + (figW * 0.35), figW * 0.28, 0, Math.PI * 2);
      ctx.fill();

      // Torso / Silhouette
      ctx.beginPath();
      ctx.moveTo(figX - figW * 0.45, figY - figH * 0.75 + bob);
      ctx.lineTo(figX + figW * 0.45, figY - figH * 0.75 + bob);
      ctx.lineTo(figX + figW * 0.35, figY - figH * 0.25 + bob);
      ctx.lineTo(figX - figW * 0.35, figY - figH * 0.25 + bob);
      ctx.closePath();
      ctx.fill();

      // Legs
      ctx.lineWidth = Math.max(1.5, figW * 0.22);
      ctx.strokeStyle = '#020617';
      ctx.beginPath();
      ctx.moveTo(figX - figW * 0.2, figY - figH * 0.25 + bob);
      ctx.lineTo(figX - figW * 0.2 + stride, figY);
      ctx.moveTo(figX + figW * 0.2, figY - figH * 0.25 + bob);
      ctx.lineTo(figX + figW * 0.2 - stride, figY);
      ctx.stroke();
    }

    // Smooth Harmonic Waveform Visualizer (No rapid jitter/flicker)
    function drawWaveform(ctx, w, h, mode, active) {
      ctx.clearRect(0, 0, w, h);
      ctx.lineWidth = 2;
      
      let strokeColor = '#94a3b8';
      if (mode === 1) strokeColor = '#ef4444';
      if (mode === 2) strokeColor = '#38bdf8';
      ctx.strokeStyle = strokeColor;

      ctx.beginPath();
      const points = 60;
      for (let i = 0; i <= points; i++) {
        const x = (w / points) * i;
        let y = h * 0.5;
        
        if (active) {
          if (mode === 0) {
            // Foley: smooth rhythmic pulse decaying along wave
            const pulse = Math.pow(Math.abs(Math.sin(t * 0.05)), 4);
            const wave = Math.sin(i * 0.4 - t * 0.08) * Math.sin(i * 0.15) * (h * 0.38) * pulse;
            y += wave;
          } else if (mode === 1) {
            // Drone: deep, undulating suspense harmonics (smooth, non-random)
            const lowSawHarmonic = (Math.sin(i * 0.25 + t * 0.06) + 0.5 * Math.sin(i * 0.5 + t * 0.12) + 0.25 * Math.sin(i * 0.75 + t * 0.18)) / 1.75;
            y += lowSawHarmonic * (h * 0.35);
          } else if (mode === 2) {
            // Upbeat: bouncy melodic double-sine
            const bounce = Math.sin(i * 0.35 + t * 0.1) * Math.cos(t * 0.05 + i * 0.1) * (h * 0.36);
            y += bounce;
          }
        } else {
          // Gentle ambient idle wave
          y += Math.sin(i * 0.2 + t * 0.03) * 2;
        }

        if (i === 0) ctx.moveTo(x, y);
        else ctx.lineTo(x, y);
      }
      ctx.stroke();
    }

    // Audio Synthesis Engine (Web Audio API)
    let audioCtx = null;
    let isPlaying = false;
    let synthTimer = null;

    function initAudio() {
      if (!audioCtx) {
        audioCtx = new (window.AudioContext || window.webkitAudioContext)();
      }
      if (audioCtx.state === 'suspended') {
        audioCtx.resume();
      }
    }

    function playFoleyFootstep() {
      if (!isPlaying || currentMode !== 0 || !audioCtx) return;
      const osc = audioCtx.createOscillator();
      const gain = audioCtx.createGain();
      osc.type = 'triangle';
      osc.frequency.setValueAtTime(80, audioCtx.currentTime);
      osc.frequency.exponentialRampToValueAtTime(30, audioCtx.currentTime + 0.12);
      gain.gain.setValueAtTime(0.3, audioCtx.currentTime);
      gain.gain.exponentialRampToValueAtTime(0.001, audioCtx.currentTime + 0.12);
      osc.connect(gain);
      gain.connect(audioCtx.destination);
      osc.start();
      osc.stop(audioCtx.currentTime + 0.13);
    }

    let droneNodes = null;
    function startDrone() {
      stopDrone();
      if (!audioCtx) return;
      const osc1 = audioCtx.createOscillator();
      const osc2 = audioCtx.createOscillator();
      const filter = audioCtx.createBiquadFilter();
      const gain = audioCtx.createGain();

      osc1.type = 'sawtooth';
      osc2.type = 'triangle';
      osc1.frequency.setValueAtTime(55, audioCtx.currentTime); // A1
      osc2.frequency.setValueAtTime(65.4, audioCtx.currentTime); // C2 Minor 3rd

      filter.type = 'lowpass';
      filter.frequency.setValueAtTime(180, audioCtx.currentTime);

      gain.gain.setValueAtTime(0.01, audioCtx.currentTime);
      gain.gain.linearRampToValueAtTime(0.18, audioCtx.currentTime + 0.4);

      osc1.connect(filter);
      osc2.connect(filter);
      filter.connect(gain);
      gain.connect(audioCtx.destination);

      osc1.start();
      osc2.start();
      droneNodes = { osc1, osc2, gain };
    }

    function stopDrone() {
      if (droneNodes) {
        try {
          droneNodes.gain.gain.linearRampToValueAtTime(0.001, audioCtx.currentTime + 0.1);
          droneNodes.osc1.stop(audioCtx.currentTime + 0.12);
          droneNodes.osc2.stop(audioCtx.currentTime + 0.12);
        } catch(e) {}
        droneNodes = null;
      }
    }

    let synthStep = 0;
    const synthNotes = [261.63, 329.63, 392.00, 523.25]; // C major upbeat
    function playSynthArp() {
      if (!isPlaying || currentMode !== 2 || !audioCtx) return;
      const osc = audioCtx.createOscillator();
      const gain = audioCtx.createGain();
      osc.type = 'sine';
      osc.frequency.setValueAtTime(synthNotes[synthStep % synthNotes.length], audioCtx.currentTime);
      synthStep++;
      gain.gain.setValueAtTime(0.15, audioCtx.currentTime);
      gain.gain.exponentialRampToValueAtTime(0.001, audioCtx.currentTime + 0.18);
      osc.connect(gain);
      gain.connect(audioCtx.destination);
      osc.start();
      osc.stop(audioCtx.currentTime + 0.19);
    }

    function scheduleAudio() {
      if (!isPlaying) return;
      if (currentMode === 0) {
        playFoleyFootstep();
      } else if (currentMode === 2) {
        playSynthArp();
      }
    }

    // Semiotic Information Mapping
    const trackInfo = [
      { 
        badge: "Realism • Isolation", 
        class: "badge-foley",
        insight: "Hollow acoustic footsteps ground the visual in stark documentary reality, framing the lone subject in isolation."
      },
      { 
        badge: "Suspense • Danger", 
        class: "badge-drone",
        insight: "A low minor-key drone with accelerating pulse induces tension, reframing the hallway as imminent peril."
      },
      { 
        badge: "Comedy • Satire", 
        class: "badge-synth",
        insight: "Bouncy synth arpeggios subvert the gloomy corridor, turning the ambiguous walk into lighthearted comedy."
      }
    ];

    function switchTrack(modeIndex) {
      initAudio();
      isPlaying = true;
      currentMode = modeIndex;

      document.getElementById('soundStatus').textContent = "🔊 Audio Active";
      
      // Update UI Buttons
      document.querySelectorAll('.channel-btn').forEach((btn, idx) => {
        btn.classList.toggle('active', idx === modeIndex);
      });

      // Update Meaning Badge & Insight Text
      const badgeEl = document.getElementById('meaningBadge');
      badgeEl.className = 'badge ' + trackInfo[modeIndex].class;
      badgeEl.textContent = trackInfo[modeIndex].badge;
      document.getElementById('insightText').textContent = trackInfo[modeIndex].insight;

      // Handle Audio Routines
      if (synthTimer) clearInterval(synthTimer);
      stopDrone();

      if (modeIndex === 0) {
        synthTimer = setInterval(scheduleAudio, 450);
      } else if (modeIndex === 1) {
        startDrone();
        synthTimer = setInterval(() => {
          if (audioCtx) {
            const tick = audioCtx.createOscillator();
            const g = audioCtx.createGain();
            tick.type = 'square';
            tick.frequency.setValueAtTime(800, audioCtx.currentTime);
            g.gain.setValueAtTime(0.03, audioCtx.currentTime);
            g.gain.exponentialRampToValueAtTime(0.001, audioCtx.currentTime + 0.04);
            tick.connect(g);
            g.connect(audioCtx.destination);
            tick.start();
            tick.stop(audioCtx.currentTime + 0.05);
          }
        }, 320);
      } else if (modeIndex === 2) {
        synthTimer = setInterval(scheduleAudio, 220);
      }
    }

    // Render Loop
    function animate() {
      t++;
      drawCorridor(sceneCtx, sceneCanvas.width, sceneCanvas.height, currentMode);
      drawWaveform(waveCtx, waveCanvas.width, waveCanvas.height, currentMode, isPlaying);
      requestAnimationFrame(animate);
    }
    requestAnimationFrame(animate);
  </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="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: #f8fafc;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-start;
      padding: 10px;
      gap: 8px;
      min-height: 100%;
    }

    /* Controls Header */
    .controls-wrapper {
      width: 100%;
      max-width: 440px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .control-row {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .control-label {
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: #64748b;
      width: 48px;
      flex-shrink: 0;
    }

    .btn-group {
      display: flex;
      flex: 1;
      background: #e2e8f0;
      padding: 2px;
      border-radius: 8px;
      gap: 2px;
    }

    .toggle-btn {
      flex: 1;
      padding: 5px 2px;
      font-size: 11px;
      font-weight: 600;
      border: none;
      background: transparent;
      color: #475569;
      border-radius: 6px;
      cursor: pointer;
      text-align: center;
      transition: background 0.2s, color 0.2s, box-shadow 0.2s;
      white-space: nowrap;
    }

    .toggle-btn.active {
      background: #ffffff;
      color: #0284c7;
      box-shadow: 0 1px 3px rgba(0,0,0,0.1);
      font-weight: 700;
    }

    /* Viewfinder Container */
    .viewfinder {
      position: relative;
      width: 100%;
      max-width: 440px;
      height: 220px;
      background: #0f172a;
      border-radius: 12px;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: inset 0 0 20px rgba(0,0,0,0.5);
    }

    /* Horizon & Floor perspective */
    .world {
      position: absolute;
      inset: 0;
      overflow: hidden;
      perspective: 400px;
      transition: transform 0.4s ease;
    }

    .sky {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 60%;
      background: linear-gradient(180deg, #1e293b 0%, #334155 100%);
      transition: height 0.4s ease;
    }

    .ground {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 40%;
      background: linear-gradient(180deg, #047857 0%, #064e3b 100%);
      transition: height 0.4s ease;
    }

    .ground-grid {
      position: absolute;
      inset: 0;
      background-image: 
        linear-gradient(to right, rgba(255,255,255,0.08) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.08) 1px, transparent 1px);
      background-size: 24px 16px;
      transform-origin: top center;
    }

    /* Viewfinder Overlays */
    .grid-lines {
      position: absolute;
      inset: 0;
      pointer-events: none;
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      grid-template-rows: 1fr 1fr 1fr;
      border: 1px solid rgba(255,255,255,0.15);
    }

    .grid-lines > div {
      border: 0.5px solid rgba(255,255,255,0.12);
    }

    /* UI Badges on Camera */
    .hud-top {
      position: absolute;
      top: 8px;
      left: 10px;
      right: 10px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 10px;
      font-family: monospace;
      color: rgba(255,255,255,0.8);
      pointer-events: none;
      z-index: 5;
    }

    .rec-badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      color: #ef4444;
      font-weight: 700;
    }

    .rec-dot {
      width: 7px;
      height: 7px;
      background: #ef4444;
      border-radius: 50%;
      animation: blink 1s infinite;
    }

    @keyframes blink {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.3; }
    }

    .hud-center-cross {
      position: absolute;
      width: 14px;
      height: 14px;
      border: 1px solid rgba(255,255,255,0.4);
      border-radius: 50%;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      pointer-events: none;
      z-index: 4;
    }

    /* Subject / Character */
    .subject-box {
      position: absolute;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-end;
      transform-origin: bottom center;
      transition: all 0.4s cubic-bezier(0.34, 1.2, 0.64, 1);
      z-index: 3;
      bottom: 25%;
      left: 50%;
      transform: translateX(-50%);
    }

    .figure {
      font-size: 64px;
      line-height: 1;
      filter: drop-shadow(0 4px 6px rgba(0,0,0,0.5));
      transition: transform 0.4s ease, font-size 0.4s ease;
      user-select: none;
    }

    .shadow {
      width: 38px;
      height: 8px;
      background: rgba(0,0,0,0.45);
      border-radius: 50%;
      margin-top: -4px;
      transition: all 0.4s ease;
    }

    /* Analysis Output Card */
    .analysis-card {
      width: 100%;
      max-width: 440px;
      background: #ffffff;
      border-radius: 10px;
      padding: 10px 14px;
      border: 1px solid #e2e8f0;
      box-shadow: 0 1px 4px rgba(0,0,0,0.04);
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .analysis-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 6px;
    }

    .code-tag {
      font-size: 11px;
      font-weight: 700;
      padding: 2px 6px;
      border-radius: 4px;
      background: #e0f2fe;
      color: #0369a1;
    }

    .effect-title {
      font-size: 13px;
      font-weight: 700;
      color: #0f172a;
    }

    .analysis-body {
      font-size: 12px;
      color: #475569;
      line-height: 1.35;
    }

    .viewer-relation {
      font-weight: 600;
      color: #0284c7;
    }
  </style>
</head>
<body>

  
  <div class="controls-wrapper">
    
    <div class="control-row">
      <span class="control-label">Angle</span>
      <div class="btn-group">
        <button class="toggle-btn" data-type="angle" data-val="low">Low Angle</button>
        <button class="toggle-btn active" data-type="angle" data-val="eye">Eye Level</button>
        <button class="toggle-btn" data-type="angle" data-val="high">High Angle</button>
      </div>
    </div>

    
    <div class="control-row">
      <span class="control-label">Shot</span>
      <div class="btn-group">
        <button class="toggle-btn" data-type="shot" data-val="wide">Wide</button>
        <button class="toggle-btn active" data-type="shot" data-val="med">Medium</button>
        <button class="toggle-btn" data-type="shot" data-val="ecu">Close-Up</button>
      </div>
    </div>
  </div>

  
  <div class="viewfinder" id="viewfinder">
    
    <div class="world" id="world">
      <div class="sky" id="sky"></div>
      <div class="ground" id="ground">
        <div class="ground-grid"></div>
      </div>
    </div>

    
    <div class="grid-lines">
      <div></div><div></div><div></div>
      <div></div><div></div><div></div>
      <div></div><div></div><div></div>
    </div>

    
    <div class="hud-top">
      <span class="rec-badge"><span class="rec-dot"></span>REC</span>
      <span id="hudSpecs">4K • 24FPS</span>
      <span>00:00:10</span>
    </div>
    <div class="hud-center-cross"></div>

    
    <div class="subject-box" id="subjectBox">
      <div class="figure" id="figure">🧑‍💼</div>
      <div class="shadow" id="shadow"></div>
    </div>
  </div>

  
  <div class="analysis-card" id="analysisCard">
    <div class="analysis-header">
      <span class="effect-title" id="effectTitle">Neutral &amp; Relational</span>
      <span class="code-tag" id="codeTag">Eye Level + Medium</span>
    </div>
    <div class="analysis-body" id="analysisText">
      Places viewer as an <span class="viewer-relation">equal peer</span>. Promotes conversational engagement and balanced dialogue.
    </div>
  </div>

  <script>
    const state = {
      angle: 'eye',
      shot: 'med'
    };

    const analysisData = {
      // LOW ANGLE
      'low-ecu': {
        title: 'Intense Dominance & Power',
        text: 'Looming extreme close-up forces direct confrontation, amplifying emotional authority and psychological weight.'
      },
      'low-med': {
        title: 'Power & Authority',
        text: 'Camera looks upward at subject, positioning viewer in an inferior stance that builds authority and heroic status.'
      },
      'low-wide': {
        title: 'Monumental Scale',
        text: 'Subject towers over landscape from below, emphasizing command, control, and dominance over surrounding space.'
      },
      // EYE LEVEL
      'eye-ecu': {
        title: 'Emotional Intimacy',
        text: 'Close proximity captures micro-expressions, drawing viewer into immediate personal empathy and intense focus.'
      },
      'eye-med': {
        title: 'Neutral & Relational',
        text: 'Simulates everyday human eye contact. Creates an authentic peer-to-peer connection for straightforward dialogue.'
      },
      'eye-wide': {
        title: 'Contextual Balance',
        text: 'Presents subject and environment equally, providing clear spatial awareness without dramatic bias.'
      },
      // HIGH ANGLE
      'high-ecu': {
        title: 'Intense Vulnerability',
        text: 'Looking down into close facial detail highlights distress, exposure, and trapped emotional fragility.'
      },
      'high-med': {
        title: 'Diminished Status',
        text: 'Looking down reduces perceived stature, making the subject appear submissive, scrutinized, or vulnerable.'
      },
      'high-wide': {
        title: 'Isolation & Helplessness',
        text: 'Subject shrinks inside expansive surroundings, visually constructing insignificance, loneliness, or powerlessness.'
      }
    };

    const skyEl = document.getElementById('sky');
    const groundEl = document.getElementById('ground');
    const subjectBox = document.getElementById('subjectBox');
    const figureEl = document.getElementById('figure');
    const shadowEl = document.getElementById('shadow');
    const effectTitle = document.getElementById('effectTitle');
    const codeTag = document.getElementById('codeTag');
    const analysisText = document.getElementById('analysisText');

    function updateScene() {
      // 1. Perspective / Horizon adjustments based on Angle
      if (state.angle === 'low') {
        skyEl.style.height = '82%';
        groundEl.style.height = '18%';
      } else if (state.angle === 'eye') {
        skyEl.style.height = '60%';
        groundEl.style.height = '40%';
      } else if (state.angle === 'high') {
        skyEl.style.height = '28%';
        groundEl.style.height = '72%';
      }

      // 2. Shot scale and position adjustments
      let scale = 1;
      let bottomOffset = 25;
      let angleShiftY = 0;
      let shadowScale = 1;
      let emoji = '🧑‍💼';

      if (state.shot === 'wide') {
        scale = 0.52;
        shadowScale = 0.5;
      } else if (state.shot === 'med') {
        scale = 1.0;
        shadowScale = 1.0;
      } else if (state.shot === 'ecu') {
        scale = 2.1;
        shadowScale = 0; // hide floor shadow in ECU
        emoji = '👀';
      }

      // Angle position adjustments
      if (state.angle === 'low') {
        bottomOffset = (state.shot === 'ecu') ? 15 : 12;
        angleShiftY = -6;
      } else if (state.angle === 'eye') {
        bottomOffset = (state.shot === 'ecu') ? 22 : 24;
        angleShiftY = 0;
      } else if (state.angle === 'high') {
        bottomOffset = (state.shot === 'ecu') ? 35 : 44;
        angleShiftY = 8;
      }

      // Apply transforms
      subjectBox.style.bottom = `${bottomOffset}%`;
      subjectBox.style.transform = `translateX(-50%) translateY(${angleShiftY}px) scale(${scale})`;
      figureEl.textContent = emoji;
      shadowEl.style.opacity = shadowScale === 0 ? '0' : '0.45';
      shadowEl.style.transform = `scaleX(${shadowScale})`;

      // 3. Update Analysis Text
      const key = `${state.angle}-${state.shot}`;
      const data = analysisData[key];

      const angleNames = { low: 'Low Angle', eye: 'Eye Level', high: 'High Angle' };
      const shotNames = { ecu: 'Close-Up', med: 'Medium', wide: 'Wide' };

      effectTitle.textContent = data.title;
      codeTag.textContent = `${angleNames[state.angle]} + ${shotNames[state.shot]}`;
      analysisText.innerHTML = data.text;
    }

    // Bind Button Events
    document.querySelectorAll('.toggle-btn').forEach(btn => {
      btn.addEventListener('click', () => {
        const type = btn.dataset.type;
        const val = btn.dataset.val;

        // Toggle active style in group
        btn.parentElement.querySelectorAll('.toggle-btn').forEach(b => b.classList.remove('active'));
        btn.classList.add('active');

        // Update state and re-render
        state[type] = val;
        updateScene();
      });
    });

    // Initial render
    updateScene();
  </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>Digital Semiotics Grammar</title>
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; font-family: system-ui, -apple-system, sans-serif; }
    body { background: #f8fafc; color: #1e2945; padding: 12px; display: flex; flex-direction: column; align-items: center; justify-content: flex-start; min-height: 100%; }

    /* Control Tabs */
    .nav-bar { display: flex; gap: 6px; width: 100%; max-width: 480px; margin-bottom: 12px; justify-content: center; flex-wrap: wrap; }
    .tab-btn {
      flex: 1 1 120px;
      padding: 8px 10px;
      font-size: 13px;
      font-weight: 600;
      border: 1px solid #cbd5e1;
      border-radius: 8px;
      background: #ffffff;
      color: #475569;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
      transition: all 0.25s ease;
    }
    .tab-btn.active {
      background: #2563eb;
      color: #ffffff;
      border-color: #2563eb;
      box-shadow: 0 2px 6px rgba(37,99,235,0.25);
    }

    /* Phone Mockup Canvas */
    .mockup-container {
      position: relative;
      width: 100%;
      max-width: 380px;
      height: 380px;
      background: #ffffff;
      border-radius: 20px;
      border: 2px solid #e2e8f0;
      overflow: hidden;
      box-shadow: 0 8px 24px rgba(0,0,0,0.06);
      display: flex;
      flex-direction: column;
    }

    /* Mockup Header (Given vs New) */
    .mock-header {
      height: 48px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 14px;
      border-bottom: 1px solid #f1f5f9;
      position: relative;
      z-index: 2;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 6px;
      font-weight: 700;
      font-size: 13px;
      color: #0f172a;
    }
    .promo-pill {
      font-size: 11px;
      font-weight: 700;
      background: #ecfdf5;
      color: #059669;
      padding: 4px 8px;
      border-radius: 99px;
      border: 1px solid #a7f3d0;
    }

    /* Mockup Ideal Section */
    .mock-ideal {
      flex: 1.2;
      background: linear-gradient(135deg, #60a5fa, #818cf8);
      position: relative;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      text-align: center;
      padding: 12px;
    }
    .mock-ideal .hero-icon { font-size: 32px; margin-bottom: 4px; }
    .mock-ideal .hero-title { font-size: 16px; font-weight: 800; letter-spacing: -0.02em; }
    .mock-ideal .hero-sub { font-size: 12px; opacity: 0.9; }

    /* Mockup Real Section */
    .mock-real {
      flex: 1;
      background: #ffffff;
      padding: 12px 16px;
      display: flex;
      flex-direction: column;
      justify-content: space-around;
      position: relative;
    }
    .price-row {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
    }
    .price-val { font-size: 20px; font-weight: 800; color: #0f172a; }
    .price-sub { font-size: 12px; color: #64748b; }
    .cta-btn {
      width: 100%;
      background: #0f172a;
      color: #ffffff;
      font-weight: 700;
      font-size: 13px;
      padding: 10px;
      border-radius: 8px;
      text-align: center;
      border: none;
    }

    /* Analytical Overlays */
    .semiotic-overlay {
      position: absolute;
      inset: 0;
      pointer-events: none;
      opacity: 0;
      transition: opacity 0.3s ease;
      z-index: 10;
    }
    .semiotic-overlay.visible { opacity: 1; }

    /* Zone Badges & Outlines */
    .zone-tag {
      position: absolute;
      background: rgba(15, 23, 42, 0.88);
      color: #ffffff;
      font-size: 11px;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      backdrop-filter: blur(4px);
      box-shadow: 0 2px 6px rgba(0,0,0,0.2);
    }

    /* Mode 1: Ideal vs Real */
    .border-ideal {
      position: absolute;
      top: 48px;
      left: 0;
      right: 0;
      height: 172px;
      border: 3px dashed #3b82f6;
      background: rgba(59, 130, 246, 0.12);
    }
    .border-real {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 160px;
      border: 3px dashed #10b981;
      background: rgba(16, 185, 129, 0.12);
    }

    /* Mode 2: Given vs New */
    .border-given {
      position: absolute;
      top: 0;
      left: 0;
      width: 50%;
      height: 48px;
      border: 3px dashed #8b5cf6;
      background: rgba(139, 92, 246, 0.15);
    }
    .border-new {
      position: absolute;
      top: 0;
      right: 0;
      width: 50%;
      height: 48px;
      border: 3px dashed #f59e0b;
      background: rgba(245, 158, 11, 0.15);
    }

    /* Mode 3: Salience Heatmap */
    .heatmap-layer {
      position: absolute;
      inset: 0;
      background: rgba(15, 23, 42, 0.65);
      mix-blend-mode: multiply;
    }
    .heat-spot {
      position: absolute;
      border-radius: 50%;
      filter: blur(14px);
      pointer-events: none;
    }
    .spot-1 {
      top: 110px;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 140px;
      height: 60px;
      background: radial-gradient(circle, #ff0055 30%, #ffaa00 70%, transparent 100%);
    }
    .spot-2 {
      bottom: 18px;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 220px;
      height: 50px;
      background: radial-gradient(circle, #ff0055 40%, #ffaa00 75%, transparent 100%);
    }
    .salience-tag {
      position: absolute;
      top: 12px;
      left: 50%;
      transform: translateX(-50%);
      background: #ef4444;
      color: #fff;
      font-size: 11px;
      font-weight: 800;
      padding: 4px 10px;
      border-radius: 99px;
      box-shadow: 0 0 12px rgba(239, 68, 68, 0.6);
    }
  </style>
</head>
<body>

  
  <div class="nav-bar">
    <button class="tab-btn active" onclick="setMode(0)">1. Ideal / Real</button>
    <button class="tab-btn" onclick="setMode(1)">2. Given / New</button>
    <button class="tab-btn" onclick="setMode(2)">3. Salience Heatmap</button>
  </div>

  
  <div class="mockup-container">
    
    
    <div class="mock-header">
      <div class="brand-logo">✦ EcoPulse</div>
      <div class="promo-pill">New: 50% OFF</div>
    </div>

    
    <div class="mock-ideal">
      <div class="hero-icon">🏔️</div>
      <div class="hero-title">Pristine Nature Awaits</div>
      <div class="hero-sub">Carbon-neutral wilderness gear</div>
    </div>

    
    <div class="mock-real">
      <div class="price-row">
        <div>
          <div class="price-val">$24 / mo</div>
          <div class="price-sub">Billed annually</div>
        </div>
        <div style="font-size: 12px; color: #10b981; font-weight: 700;">✓ In Stock</div>
      </div>
      <button class="cta-btn">Claim Gear Now →</button>
    </div>

    
    <div id="overlay-ideal-real" class="semiotic-overlay visible">
      <div class="border-ideal">
        <span class="zone-tag" style="top: 8px; left: 8px;">▲ The Ideal (Aspirational)</span>
      </div>
      <div class="border-real">
        <span class="zone-tag" style="bottom: 8px; left: 8px;">▼ The Real (Action / Price)</span>
      </div>
    </div>

    
    <div id="overlay-given-new" class="semiotic-overlay">
      <div class="border-given">
        <span class="zone-tag" style="top: 52px; left: 8px;">◀ Given (Known Brand)</span>
      </div>
      <div class="border-new">
        <span class="zone-tag" style="top: 52px; right: 8px;">New (Offer) ▶</span>
      </div>
    </div>

    
    <div id="overlay-salience" class="semiotic-overlay">
      <div class="heatmap-layer"></div>
      <div class="heat-spot spot-1"></div>
      <div class="heat-spot spot-2"></div>
      <div class="salience-tag">🔥 Gaze Salience (High Contrast)</div>
    </div>

  </div>

  <script>
    const overlays = [
      document.getElementById('overlay-ideal-real'),
      document.getElementById('overlay-given-new'),
      document.getElementById('overlay-salience')
    ];
    const buttons = document.querySelectorAll('.tab-btn');

    function setMode(index) {
      buttons.forEach((btn, i) => {
        btn.classList.toggle('active', i === index);
      });
      overlays.forEach((ov, i) => {
        ov.classList.toggle('visible', i === index);
      });
    }
  </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>Framing & Visual Focal Points</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #f8fafc;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 12px;
      min-height: 100%;
      user-select: none;
    }

    .nav-bar {
      display: flex;
      gap: 6px;
      width: 100%;
      max-width: 540px;
      margin-bottom: 10px;
    }

    .tab-btn {
      flex: 1;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      padding: 8px 4px;
      border-radius: 8px;
      font-size: 13px;
      font-weight: 600;
      color: #64748b;
      cursor: pointer;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      transition: background 0.2s, color 0.2s, box-shadow 0.2s;
    }

    .tab-btn.active {
      background: #0284c7;
      color: #ffffff;
      border-color: #0284c7;
      box-shadow: 0 2px 6px rgba(2, 132, 199, 0.3);
    }

    .viewfinder {
      position: relative;
      width: 100%;
      max-width: 540px;
      aspect-ratio: 16 / 10;
      background: #0f172a;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: inset 0 0 0 1px rgba(255,255,255,0.1);
    }

    .scene {
      position: absolute;
      inset: 0;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.35s ease;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .scene.active {
      opacity: 1;
      pointer-events: auto;
    }

    /* Grid Overlay */
    .grid-lines {
      position: absolute;
      inset: 0;
      pointer-events: none;
      z-index: 10;
    }
    .grid-lines line {
      stroke: rgba(255, 255, 255, 0.25);
      stroke-dasharray: 4 4;
      stroke-width: 1;
    }

    /* Corner Marks */
    .viewfinder::before, .viewfinder::after {
      content: "";
      position: absolute;
      width: 14px;
      height: 14px;
      border: 2px solid rgba(255, 255, 255, 0.5);
      pointer-events: none;
      z-index: 12;
    }
    .viewfinder::before {
      top: 10px;
      left: 10px;
      border-right: none;
      border-bottom: none;
    }
    .viewfinder::after {
      bottom: 10px;
      right: 10px;
      border-left: none;
      border-top: none;
    }

    /* Heatmap Overlay */
    .heatmap {
      position: absolute;
      border-radius: 50%;
      pointer-events: none;
      z-index: 8;
      mix-blend-mode: screen;
      filter: blur(12px);
      transition: opacity 0.3s ease;
      opacity: 0.85;
    }
    .heatmap.hidden {
      opacity: 0;
    }

    .heatmap-wide {
      width: 38%;
      height: 48%;
      left: 28%;
      top: 36%;
      background: radial-gradient(circle, rgba(239, 68, 68, 0.9) 0%, rgba(245, 158, 11, 0.7) 45%, rgba(59, 130, 246, 0.2) 75%, transparent 100%);
    }

    .heatmap-medium {
      width: 32%;
      height: 44%;
      left: 26%;
      top: 16%;
      background: radial-gradient(circle, rgba(239, 68, 68, 0.95) 0%, rgba(245, 158, 11, 0.75) 45%, rgba(59, 130, 246, 0.2) 75%, transparent 100%);
    }

    .heatmap-close {
      width: 36%;
      height: 42%;
      left: 42%;
      top: 36%;
      background: radial-gradient(circle, rgba(239, 68, 68, 1) 0%, rgba(245, 158, 11, 0.8) 50%, rgba(59, 130, 246, 0.2) 80%, transparent 100%);
    }

    /* Scene Artwork & Elements */
    svg.art {
      width: 100%;
      height: 100%;
      display: block;
    }

    .controls-footer {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 540px;
      margin-top: 10px;
      padding: 0 4px;
    }

    .badge-pill {
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      padding: 4px 10px;
      border-radius: 999px;
      background: #e2e8f0;
      color: #334155;
    }

    .toggle-btn {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      padding: 6px 12px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 600;
      color: #334155;
      cursor: pointer;
      box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    }
    .toggle-btn.active {
      background: #fef2f2;
      border-color: #f87171;
      color: #dc2626;
    }

    .pulse-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #dc2626;
    }
  </style>
</head>
<body>

  
  <div class="nav-bar">
    <button class="tab-btn active" id="tab0" onclick="setShot(0)">Wide Shot</button>
    <button class="tab-btn" id="tab1" onclick="setShot(1)">Medium Shot</button>
    <button class="tab-btn" id="tab2" onclick="setShot(2)">Close-Up</button>
  </div>

  
  <div class="viewfinder">
    
    <svg class="grid-lines" viewBox="0 0 300 200" preserveAspectRatio="none">
      <line x1="100" y1="0" x2="100" y2="200" />
      <line x1="200" y1="0" x2="200" y2="200" />
      <line x1="0" y1="66.6" x2="300" y2="66.6" />
      <line x1="0" y1="133.3" x2="300" y2="133.3" />
    </svg>

    
    <div class="scene active" id="scene0">
      <svg class="art" viewBox="0 0 320 200">
        
        <rect width="320" height="200" fill="#cbd5e1" />
        <linearGradient id="skyGrad" x1="0" y1="0" x2="0" y2="1">
          <stop offset="0%" stop-color="#94a3b8" />
          <stop offset="60%" stop-color="#cbd5e1" />
          <stop offset="100%" stop-color="#e2e8f0" />
        </linearGradient>
        <rect width="320" height="130" fill="url(#skyGrad)" />

        
        <polygon points="20,110 35,110 35,90 45,90 45,110 80,110 90,80 98,80 105,110 160,110 170,95 185,95 195,110" fill="#64748b" opacity="0.5" />
        
        <ellipse cx="94" cy="70" rx="12" ry="10" fill="#94a3b8" opacity="0.6" />
        <ellipse cx="98" cy="55" rx="18" ry="12" fill="#cbd5e1" opacity="0.5" />

        
        <polygon points="0,200 0,135 70,120 150,140 230,115 320,130 320,200" fill="#475569" />
        <polygon points="0,200 40,150 120,135 190,165 280,135 320,160 320,200" fill="#334155" />

        
        <polygon points="120,138 145,130 155,142 130,148" fill="#e2e8f0" opacity="0.8" />
        <polygon points="150,133 162,125 170,136 155,140" fill="#f59e0b" />
        <rect x="132" y="122" width="14" height="10" fill="#d97706" rx="1" />
        
        <line x1="140" y1="122" x2="160" y2="105" stroke="#b45309" stroke-width="2" />
      </svg>
      <div class="heatmap heatmap-wide" id="heat0"></div>
    </div>

    
    <div class="scene" id="scene1">
      <svg class="art" viewBox="0 0 320 200">
        
        <rect width="320" height="200" fill="#e2e8f0" />
        <line x1="0" y1="150" x2="320" y2="150" stroke="#cbd5e1" stroke-width="2" />

        
        
        <path d="M75,200 L85,130 L135,130 L145,200 Z" fill="#0369a1" />
        
        <path d="M130,135 Q160,120 180,110" stroke="#0284c7" stroke-width="12" stroke-linecap="round" fill="none" />
        
        <circle cx="110" cy="90" r="24" fill="#fdba74" />
        
        <path d="M86,85 Q110,60 134,85 Q110,72 86,85 Z" fill="#1e293b" />
        
        <circle cx="118" cy="88" r="2.5" fill="#1e293b" />
        <path d="M116,98 Q124,102 128,96" stroke="#1e293b" stroke-width="2" fill="none" stroke-linecap="round" />

        
        <rect x="175" y="130" width="130" height="70" fill="#64748b" rx="2" />
        <rect x="185" y="122" width="45" height="10" fill="#f8fafc" rx="1" transform="rotate(-4 185 122)" />
        <rect x="240" y="120" width="50" height="12" fill="#f8fafc" rx="1" />
        
        <line x1="190" y1="126" x2="220" y2="124" stroke="#94a3b8" stroke-width="1.5" />
        <line x1="245" y1="125" x2="280" y2="125" stroke="#94a3b8" stroke-width="1.5" />
      </svg>
      <div class="heatmap heatmap-medium" id="heat1"></div>
    </div>

    
    <div class="scene" id="scene2">
      <svg class="art" viewBox="0 0 320 200">
        
        <rect width="320" height="200" fill="#1e293b" />
        <circle cx="160" cy="100" r="90" fill="#334155" />

        
        <ellipse cx="160" cy="165" rx="120" ry="30" fill="#0284c7" opacity="0.4" />
        <path d="M40,165 Q160,195 280,165" stroke="#38bdf8" stroke-width="3" fill="none" opacity="0.7" />

        
        <g transform="rotate(25 160 100)">
          
          <rect x="148" y="-10" width="24" height="170" fill="#f8fafc" rx="3" stroke="#cbd5e1" stroke-width="1" />
          
          <rect x="150" y="90" width="20" height="35" fill="#dc2626" rx="2" />
          <rect x="150" y="65" width="20" height="20" fill="#e2e8f0" rx="1" />
        </g>

        
        <path d="M235,90 L195,100" stroke="#f87171" stroke-width="3" fill="none" stroke-linecap="round" marker-end="url(#arr)" />
        <circle cx="238" cy="89" r="3" fill="#f87171" />
      </svg>
      <div class="heatmap heatmap-close" id="heat2"></div>
    </div>
  </div>

  
  <div class="controls-footer">
    <div class="badge-pill" id="intentBadge">Systemic Scope</div>
    <button class="toggle-btn active" id="heatToggle" onclick="toggleHeatmap()">
      <span class="pulse-dot"></span> Eye Heatmap
    </button>
  </div>

  <script>
    const intents = [
      "Systemic Scope",
      "Human Impact",
      "Evidentiary Proof"
    ];

    let currentShot = 0;
    let heatmapVisible = true;

    function setShot(index) {
      currentShot = index;
      for (let i = 0; i < 3; i++) {
        document.getElementById('tab' + i).classList.toggle('active', i === index);
        document.getElementById('scene' + i).classList.toggle('active', i === index);
      }
      document.getElementById('intentBadge').textContent = intents[index];
    }

    function toggleHeatmap() {
      heatmapVisible = !heatmapVisible;
      const btn = document.getElementById('heatToggle');
      btn.classList.toggle('active', heatmapVisible);

      for (let i = 0; i < 3; i++) {
        const heat = document.getElementById('heat' + i);
        if (heatmapVisible) {
          heat.classList.remove('hidden');
        } else {
          heat.classList.add('hidden');
        }
      }
    }
  </script>
</body>
</html>

Storyboarding and Framing a Multimodal Civic Argument

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Audio Dynamics & Multimodal Focus</title>
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      background: #f8fafc;
      color: #1e293b;
      padding: 12px 14px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      user-select: none;
      -webkit-user-select: none;
    }

    .toolbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
    }

    .btn-play {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      background: #0284c7;
      color: #ffffff;
      border: none;
      border-radius: 6px;
      padding: 7px 14px;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      transition: background 0.15s ease, opacity 0.15s ease;
    }
    .btn-play:hover { background: #0369a1; }
    .btn-play:active { opacity: 0.85; }

    .header-info {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .time-readout {
      font-size: 13px;
      font-weight: 700;
      font-variant-numeric: tabular-nums;
      color: #475569;
      background: #e2e8f0;
      padding: 4px 8px;
      border-radius: 4px;
    }

    .timeline-container {
      position: relative;
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 10px;
      padding: 30px 12px 10px;
      cursor: pointer;
      display: flex;
      flex-direction: column;
      gap: 12px;
      overflow: hidden;
    }

    /* Contrast Zone Highlight */
    .contrast-zone {
      position: absolute;
      top: 24px;
      bottom: 26px;
      left: 48%;
      width: 28%;
      background: rgba(14, 165, 233, 0.08);
      border-left: 1.5px dashed #0284c7;
      border-right: 1.5px dashed #0284c7;
      pointer-events: none;
      z-index: 1;
    }

    /* Attention Spike Banner */
    .spike-callout {
      position: absolute;
      top: 4px;
      left: 48%;
      width: 28%;
      min-width: 100px;
      transform: translateX(0);
      text-align: center;
      font-size: 10.5px;
      font-weight: 700;
      color: #0369a1;
      background: #e0f2fe;
      border: 1px solid #bae6fd;
      padding: 2px 4px;
      border-radius: 4px;
      z-index: 4;
      pointer-events: none;
      white-space: nowrap;
      box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    }

    .track {
      position: relative;
      display: flex;
      flex-direction: column;
      gap: 4px;
      z-index: 2;
    }

    .track-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 11px;
      font-weight: 700;
      color: #475569;
      text-transform: uppercase;
      letter-spacing: 0.4px;
      gap: 6px;
    }

    .track-tag {
      font-size: 10px;
      padding: 1px 5px;
      border-radius: 3px;
      font-weight: 700;
      white-space: nowrap;
    }

    .tag-voice {
      color: #1d4ed8;
      background: #eff6ff;
      border: 1px solid #dbeafe;
    }

    .tag-ambient {
      color: #b91c1c;
      background: #fef2f2;
      border: 1px solid #fee2e2;
    }

    .wave-box {
      position: relative;
      height: 56px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 6px;
      overflow: hidden;
    }

    svg {
      width: 100%;
      height: 100%;
      display: block;
    }

    /* Playhead */
    .playhead {
      position: absolute;
      top: 24px;
      bottom: 0;
      width: 2px;
      background: #0f172a;
      left: 0%;
      pointer-events: none;
      z-index: 10;
      transition: none;
    }
    .playhead::after {
      content: '';
      position: absolute;
      top: 0;
      left: -4px;
      width: 10px;
      height: 10px;
      background: #0f172a;
      clip-path: polygon(0 0, 100% 0, 50% 100%);
    }

    /* Cue Labels inside waves */
    .cue-label {
      position: absolute;
      font-size: 10px;
      font-weight: 700;
      padding: 2px 5px;
      border-radius: 3px;
      pointer-events: none;
      z-index: 3;
      white-space: nowrap;
    }

    .cue-voice {
      top: 6px;
      left: 50%;
      background: #2563eb;
      color: #ffffff;
      box-shadow: 0 1px 2px rgba(0,0,0,0.15);
    }

    .cue-silence {
      bottom: 6px;
      left: 52%;
      background: #fee2e2;
      color: #dc2626;
      border: 1px solid #fecaca;
    }

    /* Time Axis */
    .time-axis {
      position: relative;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 2px;
      z-index: 3;
    }

    .time-node {
      font-size: 10.5px;
      font-weight: 600;
      color: #64748b;
      background: #ffffff;
      padding: 1px 4px;
      border-radius: 3px;
      z-index: 4;
      line-height: 1.2;
    }

    .time-node.highlight {
      color: #0284c7;
      font-weight: 800;
      background: #e0f2fe;
      border: 1px solid #bae6fd;
    }

    /* Responsive adjustments for narrow screens */
    @media (max-width: 420px) {
      body {
        padding: 8px 10px;
        gap: 8px;
      }
      .timeline-container {
        padding: 28px 8px 8px;
        gap: 10px;
      }
      .spike-callout {
        font-size: 9.5px;
        padding: 2px 3px;
      }
      .track-meta {
        font-size: 10px;
      }
      .track-tag {
        font-size: 9px;
        padding: 1px 3px;
      }
      .cue-label {
        font-size: 9px;
        padding: 1px 4px;
      }
      .wave-box {
        height: 48px;
      }
      .time-node {
        font-size: 9.5px;
        padding: 0 2px;
      }
    }
  </style>
</head>
<body>

  <div class="toolbar">
    <button class="btn-play" id="playBtn">▶ Play</button>
    <div class="header-info">
      <div class="time-readout" id="timeText">0:00.0 / 0:08</div>
    </div>
  </div>

  <div class="timeline-container" id="timeline">
    
    <div class="spike-callout">✦ Attention Spike</div>
    
    
    <div class="contrast-zone"></div>

    
    <div class="track">
      <div class="track-meta">
        <span>Voiceover Track</span>
        <span class="track-tag tag-voice">Keyword Peak</span>
      </div>
      <div class="wave-box">
        <div class="cue-label cue-voice">"68% of households"</div>
        <svg viewBox="0 0 400 56" preserveAspectRatio="none">
          <path d="M 0 28 
                   Q 20 22, 40 28 T 80 28 T 120 25 T 160 28 
                   Q 180 31, 190 28 
                   L 200 4 L 210 52 L 220 2 L 230 54 L 240 6 L 250 50 L 260 16 L 270 40 L 280 28 
                   Q 310 23, 340 28 T 400 28" 
                fill="none" stroke="#2563eb" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/>
        </svg>
      </div>
    </div>

    
    <div class="track">
      <div class="track-meta">
        <span>Ambient / Score</span>
        <span class="track-tag tag-ambient">0 dB Silence</span>
      </div>
      <div class="wave-box">
        <div class="cue-label cue-silence">Muted (0 dB)</div>
        <svg viewBox="0 0 400 56" preserveAspectRatio="none">
          <path d="M 0 28 
                   C 30 6, 40 50, 70 28 C 100 8, 110 48, 140 28 C 160 12, 175 44, 192 28 
                   L 280 28 
                   C 295 21, 305 35, 320 28 C 345 10, 365 46, 400 28" 
                fill="none" stroke="#059669" stroke-width="2.2" stroke-linecap="round"/>
        </svg>
      </div>
    </div>

    
    <div class="time-axis">
      <span class="time-node">0:00</span>
      <span class="time-node">0:02</span>
      <span class="time-node highlight">0:04</span>
      <span class="time-node">0:06</span>
      <span class="time-node">0:08</span>
    </div>

    
    <div class="playhead" id="playhead"></div>
  </div>

  <script>
    const DURATION = 8;
    let currentTime = 0;
    let isPlaying = false;
    let lastTimestamp = null;

    const playBtn = document.getElementById('playBtn');
    const timeText = document.getElementById('timeText');
    const playhead = document.getElementById('playhead');
    const timeline = document.getElementById('timeline');

    function updateUI() {
      const pct = (currentTime / DURATION) * 100;
      playhead.style.left = pct + '%';
      const sec = Math.floor(currentTime);
      const deci = Math.floor((currentTime % 1) * 10);
      timeText.textContent = `0:0${sec}.${deci} / 0:08`;
    }

    function tick(timestamp) {
      if (!isPlaying) return;
      if (!lastTimestamp) lastTimestamp = timestamp;
      const delta = (timestamp - lastTimestamp) / 1000;
      lastTimestamp = timestamp;

      currentTime += delta;
      if (currentTime >= DURATION) {
        currentTime = 0;
      }
      updateUI();
      requestAnimationFrame(tick);
    }

    function togglePlay() {
      isPlaying = !isPlaying;
      playBtn.textContent = isPlaying ? '⏸ Pause' : '▶ Play';
      if (isPlaying) {
        lastTimestamp = null;
        requestAnimationFrame(tick);
      }
    }

    playBtn.addEventListener('click', togglePlay);

    timeline.addEventListener('click', (e) => {
      const rect = timeline.getBoundingClientRect();
      const clickX = e.clientX - rect.left;
      const frac = Math.max(0, Math.min(1, clickX / rect.width));
      currentTime = frac * DURATION;
      updateUI();
    });

    updateUI();
  </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">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #f8fafc;
      color: #1e293b;
      padding: 8px;
      font-size: 13px;
      line-height: 1.3;
    }

    .header-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 6px;
      padding: 0 2px;
    }
    .header-title {
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: #64748b;
    }
    .stepper-nav {
      display: flex;
      gap: 4px;
    }
    .step-btn {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 4px;
      padding: 2px 7px;
      font-size: 11px;
      font-weight: 600;
      color: #475569;
      cursor: pointer;
    }
    .step-btn.active {
      background: #0284c7;
      border-color: #0284c7;
      color: #ffffff;
    }

    .quad-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      grid-template-rows: 1fr 1fr;
      gap: 6px;
      height: 380px;
    }

    .panel {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 8px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
      overflow: hidden;
      transition: box-shadow 0.2s ease, border-color 0.2s ease;
    }
    .panel.highlighted {
      border-color: #0284c7;
      box-shadow: 0 0 0 2px rgba(2, 132, 199, 0.2);
    }

    .panel-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 4px;
    }
    .panel-label {
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.4px;
      color: #64748b;
    }
    .badge {
      font-size: 10px;
      font-weight: 700;
      padding: 1px 6px;
      border-radius: 10px;
      text-transform: uppercase;
    }
    .badge-claim { background: #e0e7ff; color: #3730a3; }
    .badge-visual { background: #fef3c7; color: #92400e; }
    .badge-audio { background: #ede9fe; color: #5b21b6; }
    .badge-source { background: #dcfce7; color: #166534; }

    /* Q1: Claim */
    .stat-callout {
      display: flex;
      align-items: baseline;
      gap: 4px;
      margin: 4px 0;
    }
    .stat-num {
      font-size: 22px;
      font-weight: 800;
      color: #ef4444;
    }
    .claim-text {
      font-size: 12px;
      color: #1e293b;
      font-weight: 500;
    }
    .impact-pill {
      background: #f1f5f9;
      border-left: 3px solid #6366f1;
      padding: 3px 6px;
      font-size: 11px;
      color: #475569;
      border-radius: 2px;
    }

    /* Q2: Visual Split Screen */
    .thermal-split {
      display: flex;
      flex: 1;
      border-radius: 6px;
      overflow: hidden;
      margin-top: 4px;
      border: 1px solid #cbd5e1;
      min-height: 90px;
    }
    .split-side {
      flex: 1;
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 6px;
      font-size: 11px;
      font-weight: 600;
    }
    .side-cool {
      background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 70%, #06b6d4 100%);
      color: #ffffff;
    }
    .side-hot {
      background: linear-gradient(135deg, #ea580c 0%, #ef4444 60%, #facc15 100%);
      color: #ffffff;
    }
    .thermal-tag {
      font-size: 11px;
      font-weight: 800;
      padding: 2px 5px;
      border-radius: 4px;
      align-self: flex-start;
    }
    .tag-cool { background: rgba(0,0,0,0.45); color: #93c5fd; }
    .tag-hot { background: rgba(0,0,0,0.45); color: #fecaca; }
    .thermal-icon {
      font-size: 22px;
      text-align: center;
      margin: auto 0;
    }

    /* Q3: Audio & Cues */
    .audio-block {
      display: flex;
      flex-direction: column;
      gap: 5px;
      margin-top: 2px;
    }
    .vo-quote {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      padding: 5px;
      border-radius: 4px;
      font-size: 11px;
    }
    .track-row {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 10px;
    }
    .track-label {
      width: 48px;
      font-weight: 700;
      color: #64748b;
      flex-shrink: 0;
    }
    .track-timeline {
      flex: 1;
      height: 16px;
      background: #e2e8f0;
      border-radius: 3px;
      display: flex;
      overflow: hidden;
      position: relative;
    }
    .music-bar-norm {
      width: 55%;
      background: #8b5cf6;
      opacity: 0.7;
    }
    .music-bar-duck {
      width: 45%;
      background: #c084fc;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #4c1d95;
      font-weight: 800;
      font-size: 9px;
    }
    .audio-btn {
      background: #ede9fe;
      border: 1px solid #c4b5fd;
      border-radius: 4px;
      padding: 3px 8px;
      font-size: 10px;
      font-weight: 600;
      color: #5b21b6;
      cursor: pointer;
      align-self: flex-start;
      margin-top: 2px;
    }

    /* Q4: Evidence & Source */
    .evidence-block {
      display: flex;
      flex-direction: column;
      gap: 5px;
      margin-top: 2px;
    }
    .source-card {
      background: #f0fdf4;
      border: 1px solid #bbf7d0;
      border-radius: 4px;
      padding: 5px;
    }
    .source-title {
      font-size: 11px;
      font-weight: 700;
      color: #14532d;
    }
    .source-sub {
      font-size: 10px;
      color: #166534;
      margin-top: 1px;
    }
    .citation-tag {
      display: flex;
      align-items: center;
      gap: 4px;
      font-size: 10px;
      font-weight: 600;
      color: #475569;
    }

    @media (max-width: 420px) {
      .quad-grid { height: 430px; }
      .stat-num { font-size: 18px; }
      .claim-text { font-size: 11px; }
    }
  </style>
</head>
<body>

  <div class="header-bar">
    <div class="header-title">Multimodal Storyboard Card</div>
    <div class="stepper-nav">
      <button class="step-btn active" onclick="showPanel('all')">All</button>
      <button class="step-btn" onclick="showPanel(1)">1. Claim</button>
      <button class="step-btn" onclick="showPanel(2)">2. Visual</button>
      <button class="step-btn" onclick="showPanel(3)">3. Audio</button>
      <button class="step-btn" onclick="showPanel(4)">4. Source</button>
    </div>
  </div>

  <div class="quad-grid">
    
    <div class="panel" id="panel-1">
      <div class="panel-header">
        <span class="panel-label">1. Thesis &amp; Sub-Claim</span>
        <span class="badge badge-claim">EJ Context</span>
      </div>
      <div>
        <div class="stat-callout">
          <span class="stat-num">+14°F</span>
          <span class="claim-text">thermal disparity</span>
        </div>
        <p class="claim-text">Surface temperatures vary by 14°F within 2 miles due to tree cover deficits.</p>
      </div>
      <div class="impact-pill">Focus: Infrastructure inequality</div>
    </div>

    
    <div class="panel" id="panel-2">
      <div class="panel-header">
        <span class="panel-label">2. Visual Framing</span>
        <span class="badge badge-visual">Infrared Split</span>
      </div>
      <div class="thermal-split">
        <div class="split-side side-cool">
          <span class="thermal-tag tag-cool">78°F</span>
          <div class="thermal-icon">🌳🚏</div>
          <span>Canopy Shaded</span>
        </div>
        <div class="split-side side-hot">
          <span class="thermal-tag tag-hot">92°F</span>
          <div class="thermal-icon">☀️🚏</div>
          <span>Zero Tree Cover</span>
        </div>
      </div>
    </div>

    
    <div class="panel" id="panel-3">
      <div class="panel-header">
        <span class="panel-label">3. Audio Track &amp; Cues</span>
        <span class="badge badge-audio">Audio Sync</span>
      </div>
      <div class="audio-block">
        <div class="vo-quote">
          🎙️ "This bus stop isn't just uncomfortable—it is <strong style="color:#ef4444;">hazardous</strong>."
        </div>
        <div class="track-row">
          <span class="track-label">Music</span>
          <div class="track-timeline">
            <div class="music-bar-norm"></div>
            <div class="music-bar-duck">⤓ -80% Duck</div>
          </div>
        </div>
        <div class="track-row">
          <span class="track-label">SFX</span>
          <span style="font-size:10px; color:#475569;">🚗 Real traffic roar (ambient bed)</span>
        </div>
      </div>
      <button class="audio-btn" id="playAudioBtn" onclick="playAudioDemo()">Play Cue Demo 🔊</button>
    </div>

    
    <div class="panel" id="panel-4">
      <div class="panel-header">
        <span class="panel-label">4. Evidentiary Cue</span>
        <span class="badge badge-source">Source Proof</span>
      </div>
      <div class="evidence-block">
        <div class="source-card">
          <div class="source-title">City Environmental Services Dept.</div>
          <div class="source-sub">2024 Satellite Thermal Audit</div>
        </div>
        <div class="citation-tag">
          <span>✓ On-Screen Lower Third Citation</span>
        </div>
        <div class="citation-tag">
          <span>📍 High-resolution radiometric GIS data</span>
        </div>
      </div>
    </div>
  </div>

  <script>
    function showPanel(num) {
      const buttons = document.querySelectorAll('.step-btn');
      buttons.forEach((btn, idx) => {
        btn.classList.remove('active');
        if ((num === 'all' && idx === 0) || (num === idx)) {
          btn.classList.add('active');
        }
      });

      for (let i = 1; i <= 4; i++) {
        const p = document.getElementById('panel-' + i);
        if (num === 'all' || num === i) {
          p.classList.add('highlighted');
          p.style.opacity = '1';
        } else {
          p.classList.remove('highlighted');
          p.style.opacity = '0.4';
        }
      }
      if (num === 'all') {
        for (let i = 1; i <= 4; i++) {
          document.getElementById('panel-' + i).classList.remove('highlighted');
        }
      }
    }

    function playAudioDemo() {
      const btn = document.getElementById('playAudioBtn');
      btn.textContent = 'Playing... 🎵';
      btn.disabled = true;

      try {
        const ctx = new (window.AudioContext || window.webkitAudioContext)();
        
        // Ambient background drone
        const osc1 = ctx.createOscillator();
        const gain1 = ctx.createGain();
        osc1.type = 'triangle';
        osc1.frequency.setValueAtTime(140, ctx.currentTime);
        gain1.gain.setValueAtTime(0.08, ctx.currentTime);
        
        // Ducking at beat 1.2s
        gain1.gain.setValueAtTime(0.08, ctx.currentTime + 1.0);
        gain1.gain.exponentialRampToValueAtTime(0.015, ctx.currentTime + 1.2); // Duck -80%
        gain1.gain.setValueAtTime(0.015, ctx.currentTime + 2.0);
        gain1.gain.exponentialRampToValueAtTime(0.08, ctx.currentTime + 2.3);

        osc1.connect(gain1);
        gain1.connect(ctx.destination);
        osc1.start();
        osc1.stop(ctx.currentTime + 2.8);

        // Simulated emphasis chime at cue word "hazardous"
        const osc2 = ctx.createOscillator();
        const gain2 = ctx.createGain();
        osc2.type = 'sine';
        osc2.frequency.setValueAtTime(520, ctx.currentTime + 1.2);
        gain2.gain.setValueAtTime(0.001, ctx.currentTime);
        gain2.gain.setValueAtTime(0.12, ctx.currentTime + 1.2);
        gain2.gain.exponentialRampToValueAtTime(0.001, ctx.currentTime + 2.0);

        osc2.connect(gain2);
        gain2.connect(ctx.destination);
        osc2.start(ctx.currentTime + 1.2);
        osc2.stop(ctx.currentTime + 2.8);

        setTimeout(() => {
          btn.textContent = 'Play Cue Demo 🔊';
          btn.disabled = false;
        }, 2800);
      } catch(e) {
        btn.textContent = 'Play Cue Demo 🔊';
        btn.disabled = false;
      }
    }
  </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">
  <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: #0f172a;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    /* Controls Bar */
    .controls {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
    }
    .segmented-tabs {
      display: inline-flex;
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 2px;
      gap: 2px;
    }
    .tab-btn {
      border: none;
      background: transparent;
      padding: 6px 10px;
      font-size: 13px;
      font-weight: 600;
      color: #64748b;
      border-radius: 6px;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .tab-btn.active {
      background: #ffffff;
      color: #0f172a;
      box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    }
    .play-btn {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #0f172a;
      color: #ffffff;
      border: none;
      border-radius: 8px;
      padding: 6px 12px;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      transition: background 0.2s ease;
    }
    .play-btn:hover { background: #334155; }
    .play-btn:active { background: #020617; }

    /* Main Stage */
    .stage {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      position: relative;
    }
    @media (max-width: 520px) {
      .stage { grid-template-columns: 1fr; }
    }

    /* Track Columns */
    .column {
      background: #ffffff;
      border-radius: 10px;
      border: 1px solid #e2e8f0;
      padding: 10px;
      display: flex;
      flex-direction: column;
      gap: 8px;
      position: relative;
      overflow: hidden;
      transition: opacity 0.3s ease;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 8px;
      border-radius: 6px;
      width: fit-content;
    }
    .badge-error {
      background: #fef2f2;
      border: 1px solid #fecaca;
      color: #dc2626;
    }
    .badge-success {
      background: #ecfdf5;
      border: 1px solid #a7f3d0;
      color: #059669;
    }

    /* Storyboard Tracks */
    .track-row {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .track-label {
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: #64748b;
      display: flex;
      justify-content: space-between;
    }

    /* Video Frame (Sight) */
    .frame-box {
      height: 72px;
      border-radius: 6px;
      position: relative;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      font-weight: 600;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
    }
    .frame-desync {
      background: linear-gradient(135deg, #fee2e2 0%, #fef2f2 100%);
      border-color: #fca5a5;
      color: #991b1b;
    }
    .frame-sync {
      background: linear-gradient(135deg, #dcfce7 0%, #f0fdf4 100%);
      border-color: #86efac;
      color: #166534;
    }

    /* Sound Track */
    .audio-box {
      height: 48px;
      border-radius: 6px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      padding: 4px 8px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 6px;
    }
    .audio-text {
      font-size: 11px;
      color: #334155;
      font-style: italic;
      line-height: 1.2;
      flex: 1;
    }
    .waveform-svg {
      width: 70px;
      height: 28px;
      flex-shrink: 0;
    }

    /* Data Track */
    .data-box {
      height: 44px;
      border-radius: 6px;
      padding: 6px 10px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 12px;
      font-weight: 700;
      border: 1px solid #e2e8f0;
      background: #ffffff;
    }
    .data-desync {
      border-color: #fecaca;
      background: #fff5f5;
      color: #991b1b;
    }
    .data-sync {
      border-color: #a7f3d0;
      background: #f0fdf4;
      color: #065f46;
    }

    /* Synergy / Friction Callouts */
    .footer-callout {
      font-size: 11px;
      font-weight: 600;
      padding: 6px 8px;
      border-radius: 6px;
      text-align: center;
      margin-top: 2px;
    }
    .callout-desync {
      background: #fff1f2;
      color: #be123c;
      border: 1px dashed #fda4af;
    }
    .callout-sync {
      background: #ecfdf5;
      color: #047857;
      border: 1px solid #6ee7b7;
    }

    /* Playhead Scanner Line */
    .playhead {
      position: absolute;
      top: 0;
      bottom: 0;
      width: 2px;
      background: #0ea5e9;
      box-shadow: 0 0 8px #0ea5e9;
      pointer-events: none;
      opacity: 0;
      z-index: 10;
    }
    .scanning {
      animation: scanPlayhead 2.4s ease-in-out forwards;
    }
    @keyframes scanPlayhead {
      0% { left: 0%; opacity: 1; }
      90% { left: 100%; opacity: 1; }
      100% { left: 100%; opacity: 0; }
    }

    /* Pulse Highlights */
    .pulse-sync {
      animation: pulseGreen 1.2s infinite ease-in-out;
    }
    @keyframes pulseGreen {
      0%, 100% { stroke-width: 2; stroke: #10b981; }
      50% { stroke-width: 3.5; stroke: #059669; }
    }
    .jitter-desync {
      animation: jitterRed 0.6s infinite ease-in-out;
    }
    @keyframes jitterRed {
      0%, 100% { stroke-width: 1.5; stroke: #ef4444; }
      50% { stroke-width: 3; stroke: #b91c1c; }
    }
  </style>
</head>
<body>

  
  <div class="controls">
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      <button class="tab-btn active" onclick="setMode('both')">Side-by-Side</button>
      <button class="tab-btn" onclick="setMode('desync')">Desynced</button>
      <button class="tab-btn" onclick="setMode('sync')">Aligned</button>
    </div>
    <button class="play-btn" onclick="playSim()">
      <span id="playIcon">▶</span> Play Sync Test
    </button>
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  <div class="stage" id="stage">
    <div class="playhead" id="playhead"></div>

    
    <div class="column" id="colDesync">
      <div class="badge badge-error">⚠️ Multimodal Discordance</div>

      
      <div class="track-row">
        <div class="track-label"><span>1. Visual (Sight)</span><span>🚨 Diverted</span></div>
        <div class="frame-box frame-desync">
          <span>🚨 Panic Siren &amp; Stock Hazard</span>
        </div>
      </div>

      
      <div class="track-row">
        <div class="track-label"><span>2. Voiceover (Sound)</span><span>Particle Data</span></div>
        <div class="audio-box">
          <div class="audio-text">"Community air monitors recorded particulate spikes..."</div>
          <svg class="waveform-svg" viewBox="0 0 70 28">
            <polyline class="jitter-desync" fill="none" stroke="#ef4444" stroke-linecap="round" points="2,14 10,2 18,26 26,6 34,22 42,4 50,24 58,10 68,14" />
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      </div>

      
      <div class="track-row">
        <div class="track-label"><span>3. On-Screen Text</span><span>Unrelated</span></div>
        <div class="data-box data-desync">
          <span>🏛️ TOWN HALL BUDGET 7PM</span>
          <span style="font-size:10px; font-weight:600;">MISMATCH</span>
        </div>
      </div>

      <div class="footer-callout callout-desync">
        ✕ Visuals &amp; data fight voiceover topic
      </div>
    </div>

    
    <div class="column" id="colSync">
      <div class="badge badge-success">✓ Synergized Framing</div>

      
      <div class="track-row">
        <div class="track-label"><span>1. Visual (Sight)</span><span>🎯 Focused</span></div>
        <div class="frame-box frame-sync">
          <span>📍 Sensor Node at School Walkway</span>
        </div>
      </div>

      
      <div class="track-row">
        <div class="track-label"><span>2. Voiceover (Sound)</span><span>Particle Data</span></div>
        <div class="audio-box">
          <div class="audio-text">"PM2.5 particulate density surged past 142..."</div>
          <svg class="waveform-svg" viewBox="0 0 70 28">
            <polyline class="pulse-sync" fill="none" stroke="#10b981" stroke-linecap="round" points="2,14 12,14 20,4 30,24 40,6 50,22 58,14 68,14" />
          </svg>
        </div>
      </div>

      
      <div class="track-row">
        <div class="track-label"><span>3. On-Screen Text</span><span>Exact Metric</span></div>
        <div class="data-box data-sync">
          <span>📊 PM 2.5: 142 µg/m³</span>
          <span style="font-size:10px; font-weight:600;">100% LOCKSTEP</span>
        </div>
      </div>

      <div class="footer-callout callout-sync">
        ✓ Sight, sound, and data reinforce one claim
      </div>
    </div>
  </div>

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</body>
</html>

OGE.12.SL.3

Aligned learning resources

Related diagrams