<!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: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
    }
    .diagram-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      width: 100%;
      max-width: 580px;
      margin-bottom: 12px;
    }
    .column {
      background: #f8fafc;
      border-radius: 12px;
      padding: 12px 6px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      cursor: pointer;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
      box-shadow: 0 1px 3px rgba(0,0,0,0.05);
      user-select: none;
    }
    .column:hover, .column.active {
      background: #ffffff;
      box-shadow: 0 4px 12px rgba(34, 183, 255, 0.18);
      transform: translateY(-2px);
    }
    .column.active {
      outline: 2px solid #22b7ff;
    }
    .bottle-stage {
      width: 100%;
      height: 140px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 8px;
    }
    .bottle-svg {
      height: 130px;
      filter: drop-shadow(0 4px 6px rgba(0,0,0,0.06));
    }
    .label-group {
      width: 100%;
      display: flex;
      flex-direction: column;
      gap: 6px;
      align-items: center;
    }
    .tag {
      font-size: 13px;
      font-weight: 600;
      padding: 4px 8px;
      border-radius: 6px;
      width: fit-content;
      max-width: 100%;
      line-height: 1.2;
    }
    .tag-object {
      background: #e2e8f0;
      color: #334155;
    }
    .tag-plastic {
      background: #dbeafe;
      color: #1d4ed8;
      border: 1px solid #bfdbfe;
    }
    .tag-metal {
      background: #f1f5f9;
      color: #475569;
      border: 1px solid #cbd5e1;
    }
    .tag-glass {
      background: #ccfbf1;
      color: #0f766e;
      border: 1px solid #99f6e4;
    }
    .banner {
      width: 100%;
      max-width: 580px;
      background: #eff6ff;
      border: 1.5px solid #bfdbfe;
      border-radius: 10px;
      padding: 10px 14px;
      text-align: center;
      font-size: 15px;
      font-weight: 700;
      color: #1e40af;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .modes {
      display: flex;
      gap: 8px;
      margin-bottom: 12px;
    }
    .mode-btn {
      padding: 6px 12px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: #475569;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .mode-btn.active {
      background: #22b7ff;
      color: #ffffff;
      border-color: #22b7ff;
      box-shadow: 0 2px 6px rgba(34, 183, 255, 0.3);
    }
    .highlight-glow {
      animation: pulse 1.5s infinite alternate ease-in-out;
    }
    @keyframes pulse {
      from { transform: scale(1); }
      to { transform: scale(1.05); }
    }
    @media (max-width: 380px) {
      .tag {
        font-size: 11px;
        padding: 3px 5px;
      }
      .bottle-stage {
        height: 110px;
      }
      .bottle-svg {
        height: 105px;
      }
      .banner {
        font-size: 13px;
        padding: 8px 10px;
      }
    }
  </style>
</head>
<body>

  
  <div class="modes">
    <button id="btnObject" class="mode-btn" onclick="highlightMode('object')">Focus: Object</button>
    <button id="btnMaterial" class="mode-btn" onclick="highlightMode('material')">Focus: Material</button>
    <button id="btnAll" class="mode-btn active" onclick="highlightMode('all')">Show All</button>
  </div>

  <div class="diagram-grid">
    
    <div class="column" id="col-plastic" onclick="selectCol(0)">
      <div class="bottle-stage">
        <svg class="bottle-svg" viewBox="0 0 60 140" fill="none" xmlns="http://www.w3.org/2000/svg">
          <defs>
            <linearGradient id="plasticGrad" x1="0" y1="0" x2="1" y2="0">
              <stop offset="0%" stop-color="#38bdf8"/>
              <stop offset="35%" stop-color="#60a5fa"/>
              <stop offset="70%" stop-color="#93c5fd"/>
              <stop offset="100%" stop-color="#3b82f6"/>
            </linearGradient>
          </defs>
          
          <rect x="22" y="6" width="16" height="12" rx="2" fill="#1d4ed8"/>
          
          <rect x="24" y="18" width="12" height="10" fill="#60a5fa" opacity="0.9"/>
          
          <path d="M 24 28 C 16 34 12 45 12 55 L 12 124 C 12 132 18 136 24 136 L 36 136 C 42 136 48 132 48 124 L 48 55 C 48 45 44 34 36 28 Z" fill="url(#plasticGrad)" opacity="0.9"/>
          
          <line x1="16" y1="65" x2="44" y2="65" stroke="#ffffff" stroke-width="2" stroke-linecap="round" opacity="0.6"/>
          <line x1="16" y1="78" x2="44" y2="78" stroke="#ffffff" stroke-width="2" stroke-linecap="round" opacity="0.6"/>
          <line x1="16" y1="91" x2="44" y2="91" stroke="#ffffff" stroke-width="2" stroke-linecap="round" opacity="0.6"/>
          
          <path d="M 16 55 L 16 122" stroke="#ffffff" stroke-width="3" stroke-linecap="round" opacity="0.5"/>
        </svg>
      </div>
      <div class="label-group">
        <span class="tag tag-object obj-label">Object: Bottle</span>
        <span class="tag tag-plastic mat-label">Material: Plastic</span>
      </div>
    </div>

    
    <div class="column" id="col-metal" onclick="selectCol(1)">
      <div class="bottle-stage">
        <svg class="bottle-svg" viewBox="0 0 60 140" fill="none" xmlns="http://www.w3.org/2000/svg">
          <defs>
            <linearGradient id="metalGrad" x1="0" y1="0" x2="1" y2="0">
              <stop offset="0%" stop-color="#94a3b8"/>
              <stop offset="25%" stop-color="#cbd5e1"/>
              <stop offset="50%" stop-color="#f8fafc"/>
              <stop offset="75%" stop-color="#cbd5e1"/>
              <stop offset="100%" stop-color="#64748b"/>
            </linearGradient>
            <linearGradient id="capGrad" x1="0" y1="0" x2="1" y2="0">
              <stop offset="0%" stop-color="#475569"/>
              <stop offset="50%" stop-color="#94a3b8"/>
              <stop offset="100%" stop-color="#334155"/>
            </linearGradient>
          </defs>
          
          <rect x="22" y="8" width="16" height="12" rx="3" fill="url(#capGrad)"/>
          <path d="M 26 8 C 26 2 34 2 34 8" stroke="#64748b" stroke-width="3" fill="none"/>
          
          <rect x="23" y="20" width="14" height="8" fill="#94a3b8"/>
          
          <path d="M 23 28 C 17 32 14 40 14 50 L 14 126 C 14 133 18 136 25 136 L 35 136 C 42 136 46 133 46 126 L 46 50 C 46 40 43 32 37 28 Z" fill="url(#metalGrad)"/>
          
          <path d="M 27 30 L 27 134" stroke="#ffffff" stroke-width="4" opacity="0.8"/>
          <path d="M 18 52 L 18 126" stroke="#475569" stroke-width="1.5" opacity="0.3"/>
        </svg>
      </div>
      <div class="label-group">
        <span class="tag tag-object obj-label">Object: Bottle</span>
        <span class="tag tag-metal mat-label">Material: Metal</span>
      </div>
    </div>

    
    <div class="column" id="col-glass" onclick="selectCol(2)">
      <div class="bottle-stage">
        <svg class="bottle-svg" viewBox="0 0 60 140" fill="none" xmlns="http://www.w3.org/2000/svg">
          <defs>
            <linearGradient id="glassGrad" x1="0" y1="0" x2="1" y2="0">
              <stop offset="0%" stop-color="#a7f3d0" stop-opacity="0.5"/>
              <stop offset="30%" stop-color="#ccfbf1" stop-opacity="0.2"/>
              <stop offset="70%" stop-color="#ffffff" stop-opacity="0.3"/>
              <stop offset="100%" stop-color="#2dd4bf" stop-opacity="0.6"/>
            </linearGradient>
          </defs>
          
          <polygon points="23,16 37,16 35,6 25,6" fill="#d97706"/>
          
          <ellipse cx="30" cy="18" rx="8" ry="2.5" fill="#5eead4" stroke="#0d9488" stroke-width="1"/>
          
          <rect x="24" y="19" width="12" height="18" fill="url(#glassGrad)" stroke="#0d9488" stroke-width="1" opacity="0.8"/>
          
          <path d="M 24 37 C 14 44 11 58 11 72 L 11 124 C 11 132 17 136 24 136 L 36 136 C 43 136 49 132 49 124 L 49 72 C 49 58 46 44 36 37 Z" fill="url(#glassGrad)" stroke="#0d9488" stroke-width="1.2"/>
          
          <path d="M 16 65 Q 15 95 16 122" stroke="#ffffff" stroke-width="3" stroke-linecap="round" opacity="0.9"/>
          <path d="M 43 70 Q 44 95 43 118" stroke="#ffffff" stroke-width="1.5" stroke-linecap="round" opacity="0.7"/>
          <ellipse cx="30" cy="130" rx="12" ry="3" fill="#0d9488" opacity="0.2"/>
        </svg>
      </div>
      <div class="label-group">
        <span class="tag tag-object obj-label">Object: Bottle</span>
        <span class="tag tag-glass mat-label">Material: Glass</span>
      </div>
    </div>
  </div>

  
  <div class="banner" id="bannerText">
    <span>✦</span> Same object job, three different materials!
  </div>

  <script>
    const objLabels = document.querySelectorAll('.obj-label');
    const matLabels = document.querySelectorAll('.mat-label');
    const columns = document.querySelectorAll('.column');
    const btns = {
      object: document.getElementById('btnObject'),
      material: document.getElementById('btnMaterial'),
      all: document.getElementById('btnAll')
    };

    function highlightMode(mode) {
      Object.values(btns).forEach(b => b.classList.remove('active'));
      btns[mode].classList.add('active');

      if (mode === 'object') {
        objLabels.forEach(el => {
          el.style.transform = 'scale(1.08)';
          el.style.boxShadow = '0 0 0 2px #3b82f6';
          el.style.opacity = '1';
        });
        matLabels.forEach(el => {
          el.style.transform = 'scale(1)';
          el.style.boxShadow = 'none';
          el.style.opacity = '0.4';
        });
      } else if (mode === 'material') {
        objLabels.forEach(el => {
          el.style.transform = 'scale(1)';
          el.style.boxShadow = 'none';
          el.style.opacity = '0.4';
        });
        matLabels.forEach(el => {
          el.style.transform = 'scale(1.08)';
          el.style.boxShadow = '0 0 0 2px #22b7ff';
          el.style.opacity = '1';
        });
      } else {
        objLabels.forEach(el => {
          el.style.transform = 'scale(1)';
          el.style.boxShadow = 'none';
          el.style.opacity = '1';
        });
        matLabels.forEach(el => {
          el.style.transform = 'scale(1)';
          el.style.boxShadow = 'none';
          el.style.opacity = '1';
        });
      }
    }

    function selectCol(index) {
      columns.forEach((col, i) => {
        if (i === index) {
          col.classList.toggle('active');
        } else {
          col.classList.remove('active');
        }
      });
    }
  </script>
</body>
</html>

What Is an Object and What Is a Material?

<!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;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
      padding: 12px;
      user-select: none;
    }
    .diagram-area {
      position: relative;
      width: 100%;
      max-width: 480px;
      aspect-ratio: 1 / 1;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    /* Connecting lines SVG */
    .connections-svg {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      z-index: 1;
    }
    .connector-line {
      stroke: #cbd5e1;
      stroke-width: 3;
      stroke-dasharray: 6 4;
      transition: stroke 0.3s ease, stroke-width 0.3s ease;
    }
    .connector-line.active {
      stroke: #8b5a2b;
      stroke-width: 4;
      stroke-dasharray: none;
    }
    /* Center Hub: Material */
    .material-hub {
      position: absolute;
      z-index: 3;
      width: 124px;
      height: 124px;
      border-radius: 50%;
      background: #fdf6ec;
      border: 3px solid #8b5a2b;
      box-shadow: 0 4px 12px rgba(139, 90, 43, 0.15);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      cursor: pointer;
      transition: box-shadow 0.3s ease, background-color 0.3s ease;
    }
    .material-hub:hover, .material-hub.active {
      box-shadow: 0 0 0 4px rgba(139, 90, 43, 0.25), 0 6px 16px rgba(139, 90, 43, 0.2);
    }
    .hub-emoji {
      font-size: 32px;
      line-height: 1.1;
    }
    .hub-type {
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: #8b5a2b;
      margin-top: 2px;
    }
    .hub-title {
      font-size: 15px;
      font-weight: 800;
      color: #4a2c11;
    }

    /* Satellite Cards: Objects */
    .object-card {
      position: absolute;
      z-index: 2;
      width: 104px;
      padding: 8px 6px;
      border-radius: 12px;
      background: #ffffff;
      border: 2px solid #e2e8f0;
      box-shadow: 0 2px 6px rgba(0,0,0,0.06);
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      cursor: pointer;
      transition: border-color 0.3s ease, box-shadow 0.3s ease;
    }
    .object-card:hover, .object-card.active {
      border-color: #22b7ff;
      box-shadow: 0 0 0 3px rgba(34, 183, 255, 0.2), 0 4px 12px rgba(0,0,0,0.08);
    }
    .card-emoji {
      font-size: 26px;
      line-height: 1.1;
      margin-bottom: 2px;
    }
    .card-type {
      font-size: 10px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.4px;
      color: #64748b;
    }
    .card-title {
      font-size: 13px;
      font-weight: 700;
      color: #1e2945;
    }

    /* Positioning Cards in 4 corners */
    .pos-tl { top: 8%; left: 8%; }
    .pos-tr { top: 8%; right: 8%; }
    .pos-bl { bottom: 8%; left: 8%; }
    .pos-br { bottom: 8%; right: 8%; }

    @media (max-width: 380px) {
      .material-hub {
        width: 108px;
        height: 108px;
      }
      .hub-emoji { font-size: 26px; }
      .hub-type { font-size: 10px; }
      .hub-title { font-size: 14px; }
      
      .object-card {
        width: 90px;
        padding: 6px 4px;
      }
      .card-emoji { font-size: 22px; }
      .card-type { font-size: 9px; }
      .card-title { font-size: 12px; }

      .pos-tl { top: 6%; left: 4%; }
      .pos-tr { top: 6%; right: 4%; }
      .pos-bl { bottom: 6%; left: 4%; }
      .pos-br { bottom: 6%; right: 4%; }
    }
  </style>
</head>
<body>

  <div class="diagram-area" id="diagram">
    <svg class="connections-svg" viewBox="0 0 100 100" preserveAspectRatio="none">
      <defs>
        <marker id="arrow" viewBox="0 0 6 6" refX="4" refY="3" markerWidth="4" markerHeight="4" orient="auto-start-reverse">
          <path d="M 0 0 L 6 3 L 0 6 z" fill="#8b5a2b"/>
        </marker>
        <marker id="arrow-muted" viewBox="0 0 6 6" refX="4" refY="3" markerWidth="4" markerHeight="4" orient="auto-start-reverse">
          <path d="M 0 0 L 6 3 L 0 6 z" fill="#cbd5e1"/>
        </marker>
      </defs>
      
      <line id="line-0" class="connector-line active" x1="50" y1="50" x2="25" y2="25" marker-end="url(#arrow)" />
      
      <line id="line-1" class="connector-line active" x1="50" y1="50" x2="75" y2="25" marker-end="url(#arrow)" />
      
      <line id="line-2" class="connector-line active" x1="50" y1="50" x2="25" y2="75" marker-end="url(#arrow)" />
      
      <line id="line-3" class="connector-line active" x1="50" y1="50" x2="75" y2="75" marker-end="url(#arrow)" />
    </svg>

    
    <div class="material-hub active" id="hub" title="1 Material">
      <span class="hub-emoji">🪵</span>
      <span class="hub-type">Material</span>
      <span class="hub-title">Wood</span>
    </div>

    
    <div class="object-card pos-tl active" data-index="0">
      <span class="card-emoji">🪑</span>
      <span class="card-type">Object</span>
      <span class="card-title">Desk</span>
    </div>

    
    <div class="object-card pos-tr active" data-index="1">
      <span class="card-emoji">✏️</span>
      <span class="card-type">Object</span>
      <span class="card-title">Pencil</span>
    </div>

    
    <div class="object-card pos-bl active" data-index="2">
      <span class="card-emoji">🏏</span>
      <span class="card-type">Object</span>
      <span class="card-title">Bat</span>
    </div>

    
    <div class="object-card pos-br active" data-index="3">
      <span class="card-emoji">🚪</span>
      <span class="card-type">Object</span>
      <span class="card-title">Door</span>
    </div>
  </div>

  <script>
    const cards = document.querySelectorAll('.object-card');
    const lines = [
      document.getElementById('line-0'),
      document.getElementById('line-1'),
      document.getElementById('line-2'),
      document.getElementById('line-3')
    ];
    const hub = document.getElementById('hub');

    function highlight(idx) {
      if (idx === -1) {
        cards.forEach(c => c.classList.add('active'));
        lines.forEach(l => {
          l.classList.add('active');
          l.setAttribute('marker-end', 'url(#arrow)');
        });
        hub.classList.add('active');
        return;
      }

      cards.forEach((c, i) => {
        if (i === idx) {
          c.classList.add('active');
          lines[i].classList.add('active');
          lines[i].setAttribute('marker-end', 'url(#arrow)');
        } else {
          c.classList.remove('active');
          lines[i].classList.remove('active');
          lines[i].setAttribute('marker-end', 'url(#arrow-muted)');
        }
      });
      hub.classList.add('active');
    }

    cards.forEach((card, idx) => {
      card.addEventListener('click', () => {
        highlight(idx);
      });
    });

    hub.addEventListener('click', () => {
      highlight(-1);
    });
  </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: #ffffff;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
      padding: 12px;
    }

    .wrapper {
      width: 100%;
      max-width: 520px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
    }

    /* Object Section */
    .object-card {
      width: 100%;
      max-width: 320px;
      background: #f8fafc;
      border: 2px solid #e2e8f0;
      border-radius: 16px;
      padding: 12px 16px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      position: relative;
    }

    .badge-object {
      background: #2563eb;
      color: #ffffff;
      font-size: 13px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 20px;
      letter-spacing: 0.3px;
    }

    .object-title {
      font-size: 16px;
      font-weight: 700;
      color: #0f172a;
    }

    .object-sub {
      font-size: 13px;
      color: #64748b;
      margin-top: -2px;
    }

    .spoon-stage {
      width: 160px;
      height: 70px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .spoon-svg {
      width: 150px;
      height: 48px;
      transition: filter 0.3s ease;
    }

    .spoon-body {
      transition: fill 0.3s ease, stroke 0.3s ease;
    }

    .spoon-highlight {
      transition: opacity 0.3s ease;
    }

    /* Connector Branch */
    .branch-svg {
      width: 100%;
      max-width: 440px;
      height: 32px;
      display: block;
    }

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

    .material-card {
      background: #ffffff;
      border: 2px solid #e2e8f0;
      border-radius: 14px;
      padding: 10px 8px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      cursor: pointer;
      user-select: none;
      transition: border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
    }

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

    .material-card.active {
      border-color: #2563eb;
      box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
      background: #f0f7ff;
    }

    .swatch {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: inset 0 1px 3px rgba(0,0,0,0.15);
    }

    .swatch-plastic {
      background: linear-gradient(135deg, #38bdf8, #0284c7);
    }

    .swatch-metal {
      background: linear-gradient(135deg, #f1f5f9, #94a3b8, #cbd5e1);
      border: 1px solid #94a3b8;
    }

    .swatch-wood {
      background: linear-gradient(135deg, #d97706, #92400e);
    }

    .mat-name {
      font-size: 14px;
      font-weight: 700;
      color: #1e2945;
      margin-bottom: 2px;
    }

    .mat-desc {
      font-size: 12px;
      color: #64748b;
      line-height: 1.2;
    }

    /* Spoon Styles by Material */
    .theme-plastic .spoon-body {
      fill: #38bdf8;
      stroke: #0284c7;
      stroke-width: 2;
    }
    .theme-plastic .spoon-highlight {
      fill: #ffffff;
      opacity: 0.6;
    }

    .theme-metal .spoon-body {
      fill: #cbd5e1;
      stroke: #64748b;
      stroke-width: 2;
    }
    .theme-metal .spoon-highlight {
      fill: #ffffff;
      opacity: 0.85;
    }

    .theme-wood .spoon-body {
      fill: #b45309;
      stroke: #78350f;
      stroke-width: 2;
    }
    .theme-wood .spoon-highlight {
      fill: #fde68a;
      opacity: 0.35;
    }

    @media (max-width: 380px) {
      .materials-grid {
        gap: 6px;
      }
      .material-card {
        padding: 8px 4px;
      }
      .mat-name {
        font-size: 13px;
      }
      .mat-desc {
        font-size: 11px;
      }
    }
  </style>
</head>
<body>

  <div class="wrapper" id="scene">
    
    <div class="object-card">
      <span class="badge-object">Object</span>
      <div class="object-title">Spoon</div>
      <div class="object-sub">The thing you use</div>

      <div class="spoon-stage">
        <svg class="spoon-svg theme-metal" id="spoonSvg" viewBox="0 0 160 50">
          
          <path class="spoon-body" d="M 45 23 C 70 22, 125 21, 148 20 C 153 20, 155 27, 148 28 C 125 27, 70 26, 45 25 Z" />
          
          <ellipse class="spoon-body" cx="30" cy="24" rx="24" ry="16" />
          
          <path class="spoon-highlight" d="M 16 20 C 20 13, 38 13, 44 19 C 38 16, 22 16, 16 20 Z" />
          <path class="spoon-highlight" d="M 60 23 L 135 22" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" />
        </svg>
      </div>
    </div>

    
    <svg class="branch-svg" viewBox="0 0 400 32" preserveAspectRatio="none">
      
      <line x1="200" y1="0" x2="200" y2="10" stroke="#94a3b8" stroke-width="2" stroke-dasharray="3,3" />
      
      <line x1="66" y1="10" x2="334" y2="10" stroke="#94a3b8" stroke-width="2" />
      
      <path d="M 66 10 L 66 26 M 62 21 L 66 26 L 70 21" stroke="#94a3b8" stroke-width="2" fill="none" stroke-linejoin="round" />
      <path d="M 200 10 L 200 26 M 196 21 L 200 26 L 204 21" stroke="#94a3b8" stroke-width="2" fill="none" stroke-linejoin="round" />
      <path d="M 334 10 L 334 26 M 330 21 L 334 26 L 338 21" stroke="#94a3b8" stroke-width="2" fill="none" stroke-linejoin="round" />
    </svg>

    
    <div class="materials-grid" role="radiogroup" aria-label="Spoon Materials">
      <div class="material-card" data-material="plastic" role="radio" aria-checked="false" tabindex="0">
        <div class="swatch swatch-plastic"></div>
        <div class="mat-name">Plastic</div>
        <div class="mat-desc">Smooth &amp; light</div>
      </div>

      <div class="material-card active" data-material="metal" role="radio" aria-checked="true" tabindex="0">
        <div class="swatch swatch-metal"></div>
        <div class="mat-name">Metal</div>
        <div class="mat-desc">Shiny &amp; strong</div>
      </div>

      <div class="material-card" data-material="wood" role="radio" aria-checked="false" tabindex="0">
        <div class="swatch swatch-wood"></div>
        <div class="mat-name">Wood</div>
        <div class="mat-desc">Hard &amp; natural</div>
      </div>
    </div>
  </div>

  <script>
    const spoon = document.getElementById('spoonSvg');
    const cards = document.querySelectorAll('.material-card');

    function selectMaterial(matName) {
      cards.forEach(card => {
        const isMatch = card.dataset.material === matName;
        card.classList.toggle('active', isMatch);
        card.setAttribute('aria-checked', isMatch ? 'true' : 'false');
      });

      spoon.classList.remove('theme-plastic', 'theme-metal', 'theme-wood');
      spoon.classList.add('theme-' + matName);
    }

    cards.forEach(card => {
      card.addEventListener('click', () => selectMaterial(card.dataset.material));
      card.addEventListener('keydown', (e) => {
        if (e.key === 'Enter' || e.key === ' ') {
          e.preventDefault();
          selectMaterial(card.dataset.material);
        }
      });
    });
  </script>
</body>
</html>

science.ks1.y1.t3.s1

Aligned learning resources

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