<!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;
      user-select: none;
      -webkit-user-select: none;
    }

    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: center;
      min-height: 100%;
      padding: 12px;
      overflow-x: hidden;
    }

    .scene-wrap {
      width: 100%;
      max-width: 580px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
    }

    /* Direction Banner */
    .direction-banner {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: #e0f2fe;
      border: 1px solid #bae6fd;
      color: #0369a1;
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.02em;
    }

    .arrow-icon {
      font-size: 16px;
      animation: nudge 1.8s ease-in-out infinite;
    }

    @keyframes nudge {
      0%, 100% { transform: translateX(0); }
      50% { transform: translateX(4px); }
    }

    /* Main Lineup Grid */
    .line-track {
      width: 100%;
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      position: relative;
      padding: 10px 4px 18px;
      border-bottom: 4px solid #cbd5e1;
      gap: 4px;
    }

    .slot {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      position: relative;
      min-width: 0;
    }

    /* Callout Cards */
    .callout-wrapper {
      height: 48px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-end;
      width: 100%;
    }

    .callout {
      padding: 4px 6px;
      border-radius: 8px;
      font-size: 11px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 0.03em;
      text-align: center;
      box-shadow: 0 2px 6px rgba(0,0,0,0.08);
      white-space: nowrap;
      position: relative;
    }

    .callout::after {
      content: '';
      position: absolute;
      bottom: -5px;
      left: 50%;
      transform: translateX(-50%);
      border-width: 5px 5px 0;
      border-style: solid;
    }

    .callout-last {
      background: #ffedd5;
      color: #c2410c;
      border: 1.5px solid #fb923c;
    }
    .callout-last::after {
      border-color: #fb923c transparent transparent;
    }

    .callout-first {
      background: #fef08a;
      color: #854d0e;
      border: 1.5px solid #eab308;
    }
    .callout-first::after {
      border-color: #eab308 transparent transparent;
    }

    /* Character Pods */
    .avatar-pod {
      width: 100%;
      max-width: 72px;
      aspect-ratio: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #ffffff;
      border-radius: 14px;
      margin-top: 8px;
      box-shadow: 0 2px 5px rgba(0,0,0,0.04);
      border: 2px solid #e2e8f0;
      transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
      cursor: pointer;
    }

    .avatar-pod:hover, .avatar-pod:active {
      box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    }

    .slot.is-first .avatar-pod {
      border-color: #eab308;
      background: #fefce8;
    }

    .slot.is-last .avatar-pod {
      border-color: #fb923c;
      background: #fff7ed;
    }

    .emoji {
      font-size: clamp(28px, 6vw, 38px);
      line-height: 1;
    }

    /* Destination Tree */
    .destination-slot {
      flex: 0.9;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-end;
      min-width: 0;
    }

    .tree-pod {
      width: 100%;
      max-width: 72px;
      aspect-ratio: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #ecfdf5;
      border-radius: 14px;
      border: 2px dashed #34d399;
      margin-top: 8px;
    }

    .name-tag {
      margin-top: 6px;
      font-size: 11px;
      font-weight: 700;
      color: #64748b;
      text-align: center;
    }

    .slot.is-first .name-tag {
      color: #854d0e;
    }

    .slot.is-last .name-tag {
      color: #c2410c;
    }

    /* Toggle bar */
    .control-bar {
      display: flex;
      gap: 8px;
      margin-top: 4px;
    }

    .filter-btn {
      padding: 6px 14px;
      font-size: 12px;
      font-weight: 700;
      border-radius: 8px;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: #475569;
      cursor: pointer;
      transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
    }

    .filter-btn.active-first {
      background: #fef08a;
      border-color: #eab308;
      color: #854d0e;
    }

    .filter-btn.active-last {
      background: #ffedd5;
      border-color: #fb923c;
      color: #c2410c;
    }

    .filter-btn.active-all {
      background: #e2e8f0;
      border-color: #94a3b8;
      color: #0f172a;
    }
  </style>
</head>
<body>

  <div class="scene-wrap">
    
    <div class="direction-banner">
      <span>Facing front toward the snack</span>
      <span class="arrow-icon">➔</span>
    </div>

    
    <div class="line-track">
      
      <div class="slot is-last" id="slot-frog">
        <div class="callout-wrapper">
          <div class="callout callout-last" id="callout-frog">LAST (Back)</div>
        </div>
        <div class="avatar-pod" onclick="selectSlot('frog')">
          <span class="emoji">🐸</span>
        </div>
        <span class="name-tag">Frog</span>
      </div>

      
      <div class="slot" id="slot-duck">
        <div class="callout-wrapper"></div>
        <div class="avatar-pod" onclick="selectSlot('duck')">
          <span class="emoji">🦆</span>
        </div>
        <span class="name-tag">Duck</span>
      </div>

      
      <div class="slot" id="slot-pig">
        <div class="callout-wrapper"></div>
        <div class="avatar-pod" onclick="selectSlot('pig')">
          <span class="emoji">🐷</span>
        </div>
        <span class="name-tag">Pig</span>
      </div>

      
      <div class="slot is-first" id="slot-lion">
        <div class="callout-wrapper">
          <div class="callout callout-first" id="callout-lion">FIRST (Front)</div>
        </div>
        <div class="avatar-pod" onclick="selectSlot('lion')">
          <span class="emoji">🦁</span>
        </div>
        <span class="name-tag">Lion</span>
      </div>

      
      <div class="destination-slot">
        <div class="callout-wrapper"></div>
        <div class="tree-pod">
          <span class="emoji">🌳</span>
        </div>
        <span class="name-tag">Front 🍎</span>
      </div>
    </div>

    
    <div class="control-bar">
      <button class="filter-btn active-all" id="btn-all" onclick="showAll()">Show Both</button>
      <button class="filter-btn" id="btn-first" onclick="filterFirst()">Find FIRST</button>
      <button class="filter-btn" id="btn-last" onclick="filterLast()">Find LAST</button>
    </div>
  </div>

  <script>
    const frog = document.getElementById('slot-frog');
    const lion = document.getElementById('slot-lion');
    const calloutFrog = document.getElementById('callout-frog');
    const calloutLion = document.getElementById('callout-lion');
    const btnAll = document.getElementById('btn-all');
    const btnFirst = document.getElementById('btn-first');
    const btnLast = document.getElementById('btn-last');

    function resetButtons() {
      btnAll.className = 'filter-btn';
      btnFirst.className = 'filter-btn';
      btnLast.className = 'filter-btn';
    }

    function showAll() {
      resetButtons();
      btnAll.classList.add('active-all');
      frog.classList.add('is-last');
      lion.classList.add('is-first');
      calloutFrog.style.visibility = 'visible';
      calloutLion.style.visibility = 'visible';
    }

    function filterFirst() {
      resetButtons();
      btnFirst.classList.add('active-first');
      lion.classList.add('is-first');
      calloutLion.style.visibility = 'visible';
      frog.classList.remove('is-last');
      calloutFrog.style.visibility = 'hidden';
    }

    function filterLast() {
      resetButtons();
      btnLast.classList.add('active-last');
      frog.classList.add('is-last');
      calloutFrog.style.visibility = 'visible';
      lion.classList.remove('is-first');
      calloutLion.style.visibility = 'hidden';
    }

    function selectSlot(type) {
      if (type === 'lion') filterFirst();
      else if (type === 'frog') filterLast();
      else showAll();
    }
  </script>
</body>
</html>

Identifying the First and Last in a Line

<!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;
      user-select: none;
      -webkit-user-select: none;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #fdfefe;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
      padding: 16px 12px;
    }

    /* Direction Header Banner */
    .direction-banner {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: #e0f2fe;
      color: #0369a1;
      padding: 6px 16px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 15px;
      margin-bottom: 8px;
    }

    .arrow-anim {
      display: inline-block;
      animation: nudgeLeft 1.5s ease-in-out infinite;
      font-size: 18px;
    }

    @keyframes nudgeLeft {
      0%, 100% { transform: translateX(0); }
      50% { transform: translateX(-4px); }
    }

    /* Main Scene Row */
    .scene {
      width: 100%;
      max-width: 620px;
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 6px;
      padding: 12px 4px 4px 4px;
      position: relative;
    }

    /* Target: Picnic Basket */
    .target-spot {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      flex: 0 0 auto;
      padding-bottom: 8px;
    }

    .target-icon {
      font-size: 38px;
      line-height: 1;
      filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
    }

    .target-label {
      font-size: 12px;
      font-weight: 700;
      color: #e11d48;
      background: #ffe4e6;
      padding: 2px 8px;
      border-radius: 10px;
      margin-top: 4px;
    }

    /* Animal Queue */
    .queue {
      display: flex;
      flex: 1;
      justify-content: space-around;
      gap: 6px;
    }

    .animal-card {
      flex: 1;
      max-width: 96px;
      background: #ffffff;
      border: 2px solid #e2e8f0;
      border-radius: 14px;
      padding: 8px 4px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      cursor: pointer;
      position: relative;
      transition: box-shadow 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
    }

    .animal-card:active {
      background: #f8fafc;
    }

    .animal-emoji {
      font-size: 40px;
      line-height: 1.1;
      display: inline-block;
      transform: scaleX(-1); /* Faces left toward picnic */
      margin: 4px 0 6px 0;
      filter: drop-shadow(0 2px 3px rgba(0,0,0,0.08));
    }

    .pos-num {
      font-size: 12px;
      font-weight: 700;
      color: #64748b;
    }

    /* Special Status Badges */
    .badge {
      font-size: 11px;
      font-weight: 800;
      letter-spacing: 0.5px;
      padding: 3px 6px;
      border-radius: 8px;
      margin-top: 4px;
      white-space: nowrap;
      display: block;
      width: calc(100% - 4px);
    }

    .badge-first {
      background: #fef08a;
      color: #854d0e;
      border: 1px solid #facc15;
    }

    .badge-last {
      background: #e2e8f0;
      color: #334155;
      border: 1px solid #cbd5e1;
    }

    .badge-mid {
      background: #f1f5f9;
      color: #64748b;
      border: 1px solid #e2e8f0;
    }

    /* Active Highlight States */
    .animal-card.highlight-first {
      border-color: #eab308;
      box-shadow: 0 0 0 3px rgba(234, 179, 8, 0.28), 0 4px 10px rgba(0,0,0,0.06);
      background: #fefce8;
    }

    .animal-card.highlight-last {
      border-color: #6366f1;
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25), 0 4px 10px rgba(0,0,0,0.06);
      background: #eef2ff;
    }

    .animal-card.highlight-last .badge-last {
      background: #e0e7ff;
      color: #3730a3;
      border-color: #818cf8;
    }

    /* Walking Path Ground */
    .ground-line {
      width: 100%;
      max-width: 620px;
      height: 4px;
      background: #e2e8f0;
      border-radius: 2px;
      position: relative;
      margin-top: 2px;
      margin-bottom: 12px;
    }

    .ground-line::after {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      height: 100%;
      width: 15%;
      background: #cbd5e1;
      border-radius: 2px;
    }

    /* Controls Bar */
    .controls {
      display: flex;
      gap: 8px;
      justify-content: center;
      width: 100%;
      max-width: 420px;
      padding-top: 4px;
    }

    .btn {
      flex: 1;
      padding: 9px 12px;
      font-size: 14px;
      font-weight: 700;
      border-radius: 12px;
      border: 2px solid transparent;
      background: #f1f5f9;
      color: #475569;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      transition: background-color 0.2s, box-shadow 0.2s, border-color 0.2s;
    }

    .btn.active {
      background: #1e2945;
      color: #ffffff;
      border-color: #1e2945;
      box-shadow: 0 2px 6px rgba(30, 41, 69, 0.2);
    }
  </style>
</head>
<body>

  
  <div class="direction-banner">
    <span class="arrow-anim">◀</span>
    <span>Walking this way</span>
  </div>

  
  <div class="scene">
    
    
    <div class="target-spot" title="Picnic Basket">
      <div class="target-icon">🧺🍎</div>
      <div class="target-label">Snack</div>
    </div>

    
    <div class="queue">
      
      
      <div class="animal-card highlight-first" id="card-1" onclick="selectAnimal(1)">
        <span class="pos-num">1st</span>
        <span class="animal-emoji">🐻</span>
        <span class="badge badge-first">⭐ FIRST</span>
      </div>

      
      <div class="animal-card" id="card-2" onclick="selectAnimal(2)">
        <span class="pos-num">2nd</span>
        <span class="animal-emoji">🐰</span>
        <span class="badge badge-mid">Next</span>
      </div>

      
      <div class="animal-card" id="card-3" onclick="selectAnimal(3)">
        <span class="pos-num">3rd</span>
        <span class="animal-emoji">🐱</span>
        <span class="badge badge-mid">Next</span>
      </div>

      
      <div class="animal-card" id="card-4" onclick="selectAnimal(4)">
        <span class="pos-num">4th</span>
        <span class="animal-emoji">🐶</span>
        <span class="badge badge-last">LAST</span>
      </div>

    </div>

  </div>

  
  <div class="ground-line"></div>

  
  <div class="controls">
    <button class="btn active" id="btn-first" onclick="showFirst()">
      <span>⭐</span> FIRST
    </button>
    <button class="btn" id="btn-last" onclick="showLast()">
      <span>🏁</span> LAST
    </button>
    <button class="btn" id="btn-all" onclick="showAll()">
      <span>🔢</span> Line Order
    </button>
  </div>

  <script>
    const c1 = document.getElementById('card-1');
    const c2 = document.getElementById('card-2');
    const c3 = document.getElementById('card-3');
    const c4 = document.getElementById('card-4');
    const cards = [c1, c2, c3, c4];

    const btnFirst = document.getElementById('btn-first');
    const btnLast = document.getElementById('btn-last');
    const btnAll = document.getElementById('btn-all');
    const btns = [btnFirst, btnLast, btnAll];

    function clearHighlights() {
      cards.forEach(c => {
        c.classList.remove('highlight-first', 'highlight-last');
      });
      btns.forEach(b => b.classList.remove('active'));
    }

    function showFirst() {
      clearHighlights();
      c1.classList.add('highlight-first');
      btnFirst.classList.add('active');
    }

    function showLast() {
      clearHighlights();
      c4.classList.add('highlight-last');
      btnLast.classList.add('active');
    }

    function showAll() {
      clearHighlights();
      c1.classList.add('highlight-first');
      c4.classList.add('highlight-last');
      btnAll.classList.add('active');
    }

    function selectAnimal(num) {
      if (num === 1) showFirst();
      else if (num === 4) showLast();
      else {
        clearHighlights();
        cards[num - 1].classList.add('highlight-first');
      }
    }
  </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>b8 - Animal Lineup</title>
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      background: #f8fafc;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 12px;
      padding: 16px 12px;
      user-select: none;
    }

    /* Direction Header */
    .direction-bar {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      font-size: 13px;
      font-weight: 700;
      color: #0284c7;
      background: #e0f2fe;
      padding: 5px 14px;
      border-radius: 20px;
      letter-spacing: 0.5px;
    }

    /* Scene Layout */
    .scene {
      width: 100%;
      max-width: 520px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    /* Group bracket for 'In front' */
    .front-bracket-row {
      display: flex;
      align-items: flex-end;
      height: 28px;
      padding-left: 64px; /* offset for basket + divider */
      padding-right: 22%; /* offset for puppy slot */
    }

    .bracket-span {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      position: relative;
    }

    .bracket-line {
      width: 100%;
      height: 8px;
      border: 2px solid #64748b;
      border-bottom: none;
      border-radius: 6px 6px 0 0;
    }

    .bracket-label {
      position: absolute;
      top: -10px;
      background: #f8fafc;
      padding: 0 8px;
      font-size: 11px;
      font-weight: 700;
      color: #475569;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      white-space: nowrap;
    }

    /* Lineup Row - blended naturally without card shell */
    .lineup {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 6px;
      background: transparent;
      padding: 8px 4px 4px;
      position: relative;
    }

    /* Picnic Target */
    .target-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      flex-shrink: 0;
      padding: 4px 6px;
    }
    .target-emoji {
      font-size: 36px;
      line-height: 1;
      filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
    }
    .target-label {
      font-size: 11px;
      font-weight: 800;
      color: #059669;
      margin-top: 4px;
      letter-spacing: 0.5px;
    }

    /* Line Divider */
    .divider {
      width: 2px;
      height: 44px;
      background: #cbd5e1;
      border-radius: 1px;
      flex-shrink: 0;
    }

    /* Animal Slots */
    .queue {
      display: flex;
      align-items: center;
      justify-content: space-around;
      flex-grow: 1;
      gap: 4px;
    }

    .animal-card {
      display: flex;
      flex-direction: column;
      align-items: center;
      position: relative;
      padding: 8px 6px;
      border-radius: 12px;
      flex: 1;
      max-width: 78px;
    }

    .animal-emoji {
      font-size: 40px;
      line-height: 1;
      transform: scaleX(-1); /* Face left towards basket */
      display: inline-block;
    }

    .pos-tag {
      font-size: 11px;
      font-weight: 700;
      color: #64748b;
      margin-top: 6px;
      padding: 2px 8px;
      border-radius: 6px;
      background: #e2e8f0;
    }

    /* Last Item (Puppy) Highlight */
    .animal-card.is-last {
      background: #fff7ed;
      outline: 2px solid #fb923c;
      animation: gentleGlow 2.4s ease-in-out infinite alternate;
    }

    .animal-card.is-last .pos-tag {
      background: #ea580c;
      color: #ffffff;
    }

    /* Floating Ribbon Badge */
    .ribbon-badge {
      position: absolute;
      top: -16px;
      background: linear-gradient(135deg, #ea580c, #f97316);
      color: #ffffff;
      font-size: 10px;
      font-weight: 900;
      letter-spacing: 0.6px;
      padding: 3px 7px;
      border-radius: 8px;
      box-shadow: 0 2px 6px rgba(234, 88, 12, 0.35);
      display: flex;
      align-items: center;
      gap: 3px;
      animation: bounceSlow 2s infinite ease-in-out;
      z-index: 2;
      white-space: nowrap;
    }

    .ribbon-badge::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 50%;
      transform: translateX(-50%);
      border-width: 4px 4px 0;
      border-style: solid;
      border-color: #ea580c transparent transparent;
    }

    /* Caption */
    .caption-text {
      font-size: 13px;
      font-weight: 600;
      color: #64748b;
      text-align: center;
    }

    /* Keyframes */
    @keyframes bounceSlow {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-4px); }
    }

    @keyframes gentleGlow {
      0% { outline-color: #fdba74; box-shadow: 0 0 6px rgba(249, 115, 22, 0.15); }
      100% { outline-color: #ea580c; box-shadow: 0 0 14px rgba(249, 115, 22, 0.35); }
    }

    /* Responsive adjustments */
    @media (max-width: 420px) {
      .animal-emoji { font-size: 32px; }
      .target-emoji { font-size: 28px; }
      .front-bracket-row { padding-left: 50px; }
      .bracket-label { font-size: 10px; top: -9px; }
      .pos-tag { font-size: 10px; padding: 2px 5px; }
      .ribbon-badge { font-size: 9px; top: -14px; padding: 2px 5px; }
    }
  </style>
</head>
<body>

  
  <div class="direction-bar">
    <span>← FACING FRONT</span>
  </div>

  
  <div class="scene">
    
    
    <div class="front-bracket-row">
      <div class="bracket-span">
        <span class="bracket-label">In Front of Puppy</span>
        <div class="bracket-line"></div>
      </div>
    </div>

    
    <div class="lineup">
      
      <div class="target-item" title="Front of the line">
        <div class="target-emoji">🧺</div>
        <div class="target-label">SNACK</div>
      </div>

      <div class="divider"></div>

      
      <div class="queue">
        
        <div class="animal-card" id="card-bear">
          <span class="animal-emoji">🐻</span>
          <span class="pos-tag">1st</span>
        </div>

        
        <div class="animal-card" id="card-bunny">
          <span class="animal-emoji">🐰</span>
          <span class="pos-tag">2nd</span>
        </div>

        
        <div class="animal-card" id="card-cat">
          <span class="animal-emoji">🐱</span>
          <span class="pos-tag">3rd</span>
        </div>

        
        <div class="animal-card is-last" id="card-puppy">
          <div class="ribbon-badge">★ LAST</div>
          <span class="animal-emoji">🐶</span>
          <span class="pos-tag">LAST</span>
        </div>
      </div>
    </div>

  </div>

  
  <div class="caption-text">
    Puppy is at the very end of the line
  </div>

</body>
</html>

OGM.0.CC.7

Aligned learning resources

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