<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Scale Conversion Flowchart</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    }

    body {
      width: 100%;
      min-height: 100%;
      background: transparent;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 12px 8px;
      gap: 14px;
    }

    .flow-container {
      width: 100%;
      max-width: 540px;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .conversion-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 6px;
      background: #f8fafc;
      border: 2px solid #e2e8f0;
      border-radius: 14px;
      padding: 14px 12px;
      transition: box-shadow 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
      cursor: pointer;
      user-select: none;
    }

    .conversion-row:hover {
      border-color: #7dd3fc;
      background: #f0f9ff;
    }

    .conversion-row.active {
      border-color: #0284c7;
      box-shadow: 0 3px 12px rgba(2, 132, 199, 0.18);
      background: #ffffff;
    }

    .card-node {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      flex: 1 1 0;
      min-width: 0;
    }

    .label {
      font-size: 11.5px;
      font-weight: 700;
      color: #64748b;
      text-transform: uppercase;
      letter-spacing: 0.3px;
      margin-bottom: 5px;
      line-height: 1.15;
      text-align: center;
      word-break: normal;
    }

    .pill {
      font-size: 15px;
      font-weight: 800;
      padding: 5px 12px;
      border-radius: 9999px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
      white-space: nowrap;
    }

    .pill-drawing {
      background: #e0f2fe;
      color: #0284c7;
      border: 1.5px solid #bae6fd;
    }

    .pill-actual {
      background: #dcfce7;
      color: #15803d;
      border: 1.5px solid #bbf7d0;
    }

    .arrow-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      flex: 1 1 0;
      min-width: 70px;
      padding: 0 2px;
    }

    .op-pill {
      font-size: 11.5px;
      font-weight: 800;
      padding: 2px 8px;
      border-radius: 9999px;
      background: #fef3c7;
      color: #b45309;
      border: 1px solid #fde68a;
      margin-bottom: 4px;
      white-space: nowrap;
    }

    .arrow-line {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 100%;
      position: relative;
    }

    .arrow-svg {
      width: 100%;
      height: 16px;
      overflow: visible;
    }

    .formula-bar {
      font-size: 13.5px;
      font-weight: 700;
      color: #1e2945;
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
      border-radius: 10px;
      padding: 8px 14px;
      text-align: center;
      width: 100%;
      max-width: 540px;
    }

    .formula-bar .draw-val {
      color: #0284c7;
    }
    .formula-bar .op-val {
      color: #b45309;
      margin: 0 3px;
    }
    .formula-bar .act-val {
      color: #15803d;
    }

    @media (max-width: 380px) {
      .conversion-row {
        padding: 10px 6px;
        gap: 4px;
      }
      .label {
        font-size: 10px;
        letter-spacing: 0.2px;
        margin-bottom: 3px;
      }
      .pill {
        font-size: 13px;
        padding: 4px 8px;
      }
      .op-pill {
        font-size: 10px;
        padding: 2px 6px;
      }
      .arrow-container {
        min-width: 60px;
      }
      .formula-bar {
        font-size: 12.5px;
        padding: 6px 10px;
      }
    }
  </style>
</head>
<body>

  <div class="flow-container">
    
    <div class="conversion-row active" id="row1" onclick="selectRow(1)" role="button" tabindex="0">
      <div class="card-node">
        <span class="label">Drawing Length</span>
        <span class="pill pill-drawing">3.5 in</span>
      </div>

      <div class="arrow-container">
        <span class="op-pill">× 5 ft/in</span>
        <div class="arrow-line">
          <svg class="arrow-svg" viewBox="0 0 100 12" preserveAspectRatio="none">
            <line x1="0" y1="6" x2="90" y2="6" stroke="#0284c7" stroke-width="3" stroke-linecap="round"/>
            <polygon points="88,1 100,6 88,11" fill="#0284c7"/>
          </svg>
        </div>
      </div>

      <div class="card-node">
        <span class="label">Actual Length</span>
        <span class="pill pill-actual">17.5 ft</span>
      </div>
    </div>

    
    <div class="conversion-row" id="row2" onclick="selectRow(2)" role="button" tabindex="0">
      <div class="card-node">
        <span class="label">Actual Length</span>
        <span class="pill pill-actual">20 ft</span>
      </div>

      <div class="arrow-container">
        <span class="op-pill">÷ 5 ft/in</span>
        <div class="arrow-line">
          <svg class="arrow-svg" viewBox="0 0 100 12" preserveAspectRatio="none">
            <line x1="100" y1="6" x2="10" y2="6" stroke="#0284c7" stroke-width="3" stroke-linecap="round"/>
            <polygon points="12,1 0,6 12,11" fill="#0284c7"/>
          </svg>
        </div>
      </div>

      <div class="card-node">
        <span class="label">Drawing Length</span>
        <span class="pill pill-drawing">4 in</span>
      </div>
    </div>
  </div>

  <div class="formula-bar" id="formulaText">
    <span class="draw-val">3.5 in</span> <span class="op-val">× 5</span> = <span class="act-val">17.5 ft</span>
  </div>

  <script>
    function selectRow(index) {
      const r1 = document.getElementById('row1');
      const r2 = document.getElementById('row2');
      const formula = document.getElementById('formulaText');

      if (index === 1) {
        r1.classList.add('active');
        r2.classList.remove('active');
        formula.innerHTML = '<span class="draw-val">3.5 in</span> <span class="op-val">× 5</span> = <span class="act-val">17.5 ft</span>';
      } else {
        r2.classList.add('active');
        r1.classList.remove('active');
        formula.innerHTML = '<span class="act-val">20 ft</span> <span class="op-val">÷ 5</span> = <span class="draw-val">4 in</span>';
      }
    }
  </script>
</body>
</html>

Interpreting Scale Factors and Scale Ratios on Drawings

<!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;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    }

    body {
      width: 100%;
      min-height: 100%;
      background: transparent;
      color: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
    }

    /* Selector buttons */
    .controls {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .btn {
      background: #ffffff;
      border: 1.5px solid #cbd5e1;
      color: #475569;
      font-size: 13px;
      font-weight: 600;
      padding: 5px 14px;
      border-radius: 20px;
      cursor: pointer;
      box-shadow: 0 1px 2px rgba(0,0,0,0.05);
      transition: all 0.2s ease;
    }

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

    /* Main comparison stage */
    .stage {
      width: 100%;
      display: grid;
      grid-template-columns: 1fr auto 1.25fr;
      gap: 8px;
      align-items: center;
    }

    @media (max-width: 480px) {
      .stage {
        grid-template-columns: 1fr;
        gap: 6px;
      }
      .arrow-connector {
        transform: rotate(90deg);
        padding: 4px 0 !important;
      }
    }

    .panel {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 12px 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      height: 185px;
      position: relative;
      box-shadow: 0 2px 5px rgba(0,0,0,0.03);
    }

    .panel-drawing {
      background: #f0f9ff;
      border-color: #bae6fd;
      background-image: 
        linear-gradient(to right, rgba(2, 132, 199, 0.08) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(2, 132, 199, 0.08) 1px, transparent 1px);
      background-size: 12px 12px;
    }

    .panel-header {
      font-size: 13px;
      font-weight: 700;
      color: #0369a1;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .panel-actual .panel-header {
      color: #0f766e;
    }

    /* Visual graphics */
    .graphic-box {
      flex: 1;
      width: 100%;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      position: relative;
    }

    /* SVG Table */
    svg {
      overflow: visible;
    }

    .dim-line {
      stroke: #dc2626;
      stroke-width: 1.5;
    }

    .dim-marker {
      fill: #dc2626;
    }

    .dim-text {
      font-size: 12px;
      font-weight: 700;
      fill: #dc2626;
      text-anchor: middle;
      dominant-baseline: central;
    }

    /* Arrow Connector */
    .arrow-connector {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 4px;
      padding: 0 4px;
    }

    .factor-badge {
      background: #fef08a;
      border: 1px solid #facc15;
      color: #854d0e;
      font-size: 12px;
      font-weight: 800;
      padding: 3px 8px;
      border-radius: 6px;
      white-space: nowrap;
    }

    .arrow-icon {
      font-size: 20px;
      color: #0284c7;
      line-height: 1;
    }

    /* Zoom Glass Badge */
    .zoom-badge {
      font-size: 11px;
      font-weight: 600;
      color: #0369a1;
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid #bae6fd;
      border-radius: 6px;
      padding: 2px 6px;
    }

    .real-badge {
      font-size: 11px;
      font-weight: 600;
      color: #0f766e;
      background: #f0fdf4;
      border: 1px solid #bbf7d0;
      border-radius: 6px;
      padding: 2px 6px;
    }

    /* Formula Card */
    .formula-card {
      width: 100%;
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 10px;
      padding: 10px 14px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    }

    .formula-main {
      font-size: 14px;
      font-weight: 700;
      color: #1e2945;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .formula-tag {
      background: #eff6ff;
      border: 1px solid #bfdbfe;
      color: #1d4ed8;
      padding: 2px 6px;
      border-radius: 4px;
    }

    .match-warning {
      font-size: 12px;
      font-weight: 700;
      color: #b45309;
      background: #fffbeb;
      border: 1px solid #fde68a;
      padding: 3px 8px;
      border-radius: 6px;
    }
  </style>
</head>
<body>

  
  <div class="controls">
    <button class="btn" id="btn1">1 cm</button>
    <button class="btn active" id="btn2">2 cm</button>
    <button class="btn" id="btn3">3 cm</button>
  </div>

  
  <div class="stage">
    
    
    <div class="panel panel-drawing">
      <div class="panel-header">📐 Drawing</div>
      
      <div class="graphic-box">
        <svg width="100" height="75" viewBox="0 0 100 75">
          
          <g id="drawTable">
            
            <rect id="drawTop" x="20" y="32" width="60" height="6" rx="2" fill="#0284c7" />
            
            <rect id="drawLegL" x="25" y="38" width="4" height="24" rx="1" fill="#0369a1" />
            <rect id="drawLegR" x="71" y="38" width="4" height="24" rx="1" fill="#0369a1" />
            
            <line id="drawDimLine" x1="20" y1="20" x2="80" y2="20" class="dim-line" />
            <circle id="drawDimL" cx="20" cy="20" r="2" class="dim-marker" />
            <circle id="drawDimR" cx="80" cy="20" r="2" class="dim-marker" />
            <rect id="drawDimBg" x="38" y="12" width="24" height="15" rx="3" fill="#f0f9ff" />
            <text id="drawText" x="50" y="20" class="dim-text">2 cm</text>
          </g>
        </svg>
      </div>

      <div class="zoom-badge">🔍 1 cm on paper</div>
    </div>

    
    <div class="arrow-connector">
      <div class="factor-badge">× 100</div>
      <div class="arrow-icon">➔</div>
    </div>

    
    <div class="panel panel-actual">
      <div class="panel-header">🪑 Real Life</div>

      <div class="graphic-box">
        <svg width="140" height="85" viewBox="0 0 140 85">
          
          <g id="realTable">
            
            <rect id="realTop" x="15" y="30" width="110" height="10" rx="3" fill="#b45309" />
            
            <rect id="realLegL" x="22" y="40" width="8" height="34" rx="2" fill="#78350f" />
            <rect id="realLegR" x="110" y="40" width="8" height="34" rx="2" fill="#78350f" />
            
            <line id="realDimLine" x1="15" y1="16" x2="125" y2="16" class="dim-line" />
            <circle id="realDimL" cx="15" cy="16" r="2.5" class="dim-marker" />
            <circle id="realDimR" cx="125" cy="16" r="2.5" class="dim-marker" />
            <rect id="realDimBg" x="20" y="8" width="100" height="15" rx="3" fill="#ffffff" />
            <text id="realText" x="70" y="16" class="dim-text">200 cm (2 m)</text>
          </g>
        </svg>
      </div>

      <div class="real-badge" id="realDesc">100 cm (1 meter) in real life</div>
    </div>

  </div>

  
  <div class="formula-card">
    <div class="formula-main">
      <span>Drawing : Actual</span>
      <span>=</span>
      <span class="formula-tag">1 : 100</span>
    </div>
    <div class="match-warning">⚠️ Units must match!</div>
  </div>

  <script>
    const data = {
      1: {
        drawWidth: 36,
        drawLabel: "1 cm",
        realWidth: 70,
        realLabel: "100 cm (1 m)",
        realDesc: "100 cm (1 meter) in real life"
      },
      2: {
        drawWidth: 60,
        drawLabel: "2 cm",
        realWidth: 110,
        realLabel: "200 cm (2 m)",
        realDesc: "200 cm (2 meters) in real life"
      },
      3: {
        drawWidth: 84,
        drawLabel: "3 cm",
        realWidth: 130,
        realLabel: "300 cm (3 m)",
        realDesc: "300 cm (3 meters) in real life"
      }
    };

    function setScale(cm) {
      const d = data[cm];
      
      // Update buttons
      [1, 2, 3].forEach(n => {
        document.getElementById(`btn${n}`).classList.toggle('active', n === cm);
      });

      // Update Left Drawing Table
      const drawX = (100 - d.drawWidth) / 2;
      const drawRight = drawX + d.drawWidth;
      
      document.getElementById('drawTop').setAttribute('x', drawX);
      document.getElementById('drawTop').setAttribute('width', d.drawWidth);
      document.getElementById('drawLegL').setAttribute('x', drawX + 4);
      document.getElementById('drawLegR').setAttribute('x', drawRight - 8);
      
      document.getElementById('drawDimLine').setAttribute('x1', drawX);
      document.getElementById('drawDimLine').setAttribute('x2', drawRight);
      document.getElementById('drawDimL').setAttribute('cx', drawX);
      document.getElementById('drawDimR').setAttribute('cx', drawRight);
      document.getElementById('drawDimBg').setAttribute('x', 50 - 13);
      document.getElementById('drawText').textContent = d.drawLabel;

      // Update Right Real Table
      const realX = (140 - d.realWidth) / 2;
      const realRight = realX + d.realWidth;
      
      document.getElementById('realTop').setAttribute('x', realX);
      document.getElementById('realTop').setAttribute('width', d.realWidth);
      document.getElementById('realLegL').setAttribute('x', realX + 6);
      document.getElementById('realLegR').setAttribute('x', realRight - 14);

      document.getElementById('realDimLine').setAttribute('x1', realX);
      document.getElementById('realDimLine').setAttribute('x2', realRight);
      document.getElementById('realDimL').setAttribute('cx', realX);
      document.getElementById('realDimR').setAttribute('cx', realRight);
      document.getElementById('realDimBg').setAttribute('x', 70 - 45);
      document.getElementById('realDimBg').setAttribute('width', 90);
      document.getElementById('realText').textContent = d.realLabel;
      document.getElementById('realDesc').textContent = d.realDesc;
    }

    document.getElementById('btn1').addEventListener('click', () => setScale(1));
    document.getElementById('btn2').addEventListener('click', () => setScale(2));
    document.getElementById('btn3').addEventListener('click', () => setScale(3));
  </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, sans-serif;
      background: transparent;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
      padding: 16px;
    }

    .diagram-wrap {
      width: 100%;
      max-width: 480px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    /* Controls */
    .controls {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 8px;
    }
    .pill-tabs {
      display: flex;
      gap: 6px;
      flex: 1;
    }
    .pill-btn {
      flex: 1;
      padding: 6px 10px;
      font-size: 13px;
      font-weight: 600;
      border: 1px solid #e2e8f0;
      border-radius: 20px;
      background: #ffffff;
      color: #64748b;
      cursor: pointer;
      text-align: center;
      transition: all 0.2s ease;
    }
    .pill-btn.active.b1 { background: #eff6ff; color: #2563eb; border-color: #93c5fd; }
    .pill-btn.active.b2 { background: #f5f3ff; color: #7c3aed; border-color: #c4b5fd; }
    .pill-btn.active.b3 { background: #f0fdf4; color: #16a34a; border-color: #86efac; }

    .play-btn {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: #1e2945;
      font-size: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
    }

    /* Step Cards Stack */
    .steps-container {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 12px 14px;
      display: flex;
      align-items: center;
      gap: 12px;
      transition: opacity 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
      opacity: 0.45;
    }
    .step-card.active {
      opacity: 1;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    }
    .step-card.active.s1 { border-color: #60a5fa; }
    .step-card.active.s2 { border-color: #a78bfa; }
    .step-card.active.s3 { border-color: #4ade80; }

    .badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 4px 10px;
      border-radius: 16px;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.5px;
      white-space: nowrap;
      min-width: 60px;
    }
    .badge-blue { background: #dbeafe; color: #1d4ed8; }
    .badge-purple { background: #ede9fe; color: #6d28d9; }
    .badge-green { background: #dcfce7; color: #15803d; }

    .card-content {
      display: flex;
      flex-direction: column;
      gap: 2px;
      flex: 1;
    }
    .card-label {
      font-size: 13px;
      font-weight: 600;
      color: #64748b;
    }
    .card-math {
      font-size: 17px;
      font-weight: 700;
      color: #0f172a;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    }

    /* Scale Indicator */
    .scale-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 8px 12px;
      background: #f8fafc;
      border-radius: 8px;
      border: 1px dashed #cbd5e1;
      font-size: 12px;
      font-weight: 600;
      color: #64748b;
    }
    .ratio-badge {
      background: #e2e8f0;
      color: #334155;
      padding: 2px 8px;
      border-radius: 6px;
      font-weight: 700;
    }
  </style>
</head>
<body>
  <div class="diagram-wrap">
    
    <div class="controls">
      <div class="pill-tabs">
        <button class="pill-btn b1 active" onclick="setStep(0)">Step 1</button>
        <button class="pill-btn b2" onclick="setStep(1)">Step 2</button>
        <button class="pill-btn b3" onclick="setStep(2)">Step 3</button>
      </div>
      <button class="play-btn" id="playBtn" onclick="togglePlay()" aria-label="Play or Pause">⏸</button>
    </div>

    
    <div class="steps-container">
      
      <div class="step-card s1 active" id="card0" onclick="setStep(0)">
        <span class="badge badge-blue">Step 1</span>
        <div class="card-content">
          <div class="card-label">Start with Real</div>
          <div class="card-math">3.5 m</div>
        </div>
      </div>

      
      <div class="step-card s2" id="card1" onclick="setStep(1)">
        <span class="badge badge-purple">Step 2</span>
        <div class="card-content">
          <div class="card-label">Convert to cm</div>
          <div class="card-math">3.5 × 100 = 350 cm</div>
        </div>
      </div>

      
      <div class="step-card s3" id="card2" onclick="setStep(2)">
        <span class="badge badge-green">Step 3</span>
        <div class="card-content">
          <div class="card-label">Divide by Scale (50)</div>
          <div class="card-math">350 ÷ 50 = 7 cm</div>
        </div>
      </div>
    </div>

    
    <div class="scale-footer">
      <span>Scale Ratio</span>
      <span class="ratio-badge">1 : 50</span>
    </div>
  </div>

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

    const cards = [document.getElementById('card0'), document.getElementById('card1'), document.getElementById('card2')];
    const buttons = document.querySelectorAll('.pill-btn');
    const playBtn = document.getElementById('playBtn');

    function updateView() {
      cards.forEach((card, i) => {
        card.classList.toggle('active', i === currentStep);
      });
      buttons.forEach((btn, i) => {
        btn.classList.toggle('active', i === currentStep);
      });
    }

    function setStep(idx) {
      currentStep = idx;
      updateView();
      if (isPlaying) resetTimer();
    }

    function nextStep() {
      currentStep = (currentStep + 1) % 3;
      updateView();
    }

    function startTimer() {
      if (timer) clearInterval(timer);
      timer = setInterval(nextStep, 3500);
    }

    function resetTimer() {
      startTimer();
    }

    function togglePlay() {
      isPlaying = !isPlaying;
      playBtn.textContent = isPlaying ? '⏸' : '▶';
      if (isPlaying) {
        startTimer();
      } else {
        clearInterval(timer);
      }
    }

    startTimer();
  </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>Scale Relationship</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;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
      padding: 16px;
    }
    .diagram-container {
      width: 100%;
      max-width: 620px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }
    .cards-row {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 100%;
      gap: 12px;
    }
    .card-item {
      flex: 1;
      background: #ffffff;
      border: 1px solid #e6e6e6;
      border-radius: 12px;
      padding: 14px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
      min-width: 0;
      width: 100%;
    }
    .preview-box {
      width: 100%;
      height: 150px;
      border-radius: 8px;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
    }
    /* Blueprint Side */
    .blueprint-bg {
      background-color: #1d4ed8;
      background-image: 
        linear-gradient(rgba(255, 255, 255, 0.18) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.18) 1px, transparent 1px);
      background-size: 14px 14px;
      border: 1px solid #1e40af;
    }
    /* Real House Side */
    .real-bg {
      background: linear-gradient(180deg, #e0f2fe 0%, #bae6fd 64%, #86efac 64%, #4ade80 100%);
      border: 1px solid #cbd5e1;
    }
    .connector {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      width: 96px;
      padding: 4px;
      gap: 6px;
    }
    .arrow-container {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .connector-badge {
      background: #eff6ff;
      border: 1px solid #bfdbfe;
      color: #1d4ed8;
      font-size: 11px;
      font-weight: 700;
      padding: 4px 8px;
      border-radius: 6px;
      text-align: center;
      line-height: 1.2;
      white-space: nowrap;
    }
    .card-label {
      margin-top: 10px;
      font-size: 15px;
      font-weight: 700;
      color: #1e2945;
    }
    .dimension-text {
      font-size: 13px;
      font-weight: 600;
      color: #2563eb;
      margin-top: 2px;
    }
    svg {
      display: block;
    }

    /* Responsive adjustments for mobile viewports */
    @media (max-width: 520px) {
      body {
        padding: 12px;
        min-height: auto;
      }
      .diagram-container {
        max-width: 320px;
      }
      .cards-row {
        flex-direction: column;
        gap: 6px;
      }
      .card-item {
        max-width: 100%;
        padding: 10px;
      }
      .preview-box {
        height: 125px;
      }
      .connector {
        flex-direction: row-reverse;
        width: auto;
        padding: 2px 0;
        gap: 8px;
      }
      .arrow-container {
        width: 30px;
        height: 30px;
        transform: rotate(90deg);
      }
      .connector-badge {
        font-size: 11px;
        padding: 3px 8px;
      }
      .card-label {
        font-size: 14px;
        margin-top: 6px;
      }
      .dimension-text {
        font-size: 12px;
      }
    }
  </style>
</head>
<body>

  <div class="diagram-container">
    <div class="cards-row">
      
      <div class="card-item">
        <div class="preview-box blueprint-bg">
          <svg width="110" height="110" viewBox="0 0 100 100" aria-label="Blueprint House Drawing">
            
            <polygon points="50,22 20,48 80,48" fill="none" stroke="#ffffff" stroke-width="2.5" stroke-linejoin="round" />
            
            <rect x="65" y="24" width="8" height="16" fill="none" stroke="#ffffff" stroke-width="2" />
            
            <rect x="26" y="48" width="48" height="34" fill="none" stroke="#ffffff" stroke-width="2.5" />
            
            <rect x="43" y="58" width="14" height="24" fill="none" stroke="#ffffff" stroke-width="2" />
            
            <rect x="30" y="54" width="9" height="9" fill="none" stroke="#ffffff" stroke-width="1.5" />
            <rect x="61" y="54" width="9" height="9" fill="none" stroke="#ffffff" stroke-width="1.5" />
            
            <line x1="26" y1="88" x2="74" y2="88" stroke="#93c5fd" stroke-width="1.5" />
            <line x1="26" y1="85" x2="26" y2="91" stroke="#93c5fd" stroke-width="1.5" />
            <line x1="74" y1="85" x2="74" y2="91" stroke="#93c5fd" stroke-width="1.5" />
          </svg>
        </div>
        <div class="card-label">Drawing</div>
        <div class="dimension-text">4 in wide</div>
      </div>

      
      <div class="connector">
        <div class="arrow-container">
          <svg width="60" height="24" viewBox="0 0 60 24" aria-hidden="true">
            
            <polygon points="10,6 2,12 10,18" fill="#0284c7" />
            
            <line x1="8" y1="12" x2="52" y2="12" stroke="#0284c7" stroke-width="3.5" stroke-linecap="round" />
            
            <polygon points="50,6 58,12 50,18" fill="#0284c7" />
          </svg>
        </div>
        <div class="connector-badge">Scale<br>Relationship</div>
      </div>

      
      <div class="card-item">
        <div class="preview-box real-bg">
          <svg width="120" height="120" viewBox="0 0 120 120" aria-label="Actual House">
            
            <circle cx="100" cy="22" r="9" fill="#facc15" />
            
            <rect x="74" y="28" width="10" height="18" fill="#b91c1c" rx="1" />
            
            <rect x="30" y="54" width="60" height="40" fill="#f8fafc" stroke="#64748b" stroke-width="1.5" rx="1" />
            
            <polygon points="60,25 22,54 98,54" fill="#dc2626" stroke="#991b1b" stroke-width="1.5" stroke-linejoin="round" />
            
            <rect x="36" y="60" width="12" height="12" fill="#bae6fd" stroke="#0284c7" stroke-width="1.5" rx="1" />
            <line x1="42" y1="60" x2="42" y2="72" stroke="#0284c7" stroke-width="1" />
            <line x1="36" y1="66" x2="48" y2="66" stroke="#0284c7" stroke-width="1" />

            <rect x="72" y="60" width="12" height="12" fill="#bae6fd" stroke="#0284c7" stroke-width="1.5" rx="1" />
            <line x1="78" y1="60" x2="78" y2="72" stroke="#0284c7" stroke-width="1" />
            <line x1="72" y1="66" x2="84" y2="66" stroke="#0284c7" stroke-width="1" />
            
            
            <rect x="52" y="66" width="16" height="28" fill="#9a3412" rx="1" />
            <circle cx="64" cy="80" r="1.5" fill="#fef08a" />
            
            
            <circle cx="27" cy="92" r="7" fill="#16a34a" />
            <circle cx="93" cy="92" r="7" fill="#16a34a" />

            
            <line x1="30" y1="102" x2="90" y2="102" stroke="#1e2945" stroke-width="1.5" />
            <line x1="30" y1="99" x2="30" y2="105" stroke="#1e2945" stroke-width="1.5" />
            <line x1="90" y1="99" x2="90" y2="105" stroke="#1e2945" stroke-width="1.5" />
          </svg>
        </div>
        <div class="card-label">Actual</div>
        <div class="dimension-text">20 ft wide</div>
      </div>
    </div>
  </div>

</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="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: 16px;
    }

    .scale-container {
      width: 100%;
      max-width: 520px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 16px;
    }

    .diagram-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      gap: 12px;
    }

    .side-col {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      gap: 10px;
    }

    .visual-box {
      width: 100%;
      height: 120px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
    }

    .drawing-visual {
      background: #f0f9ff;
      border: 1.5px dashed #0284c7;
    }

    .real-visual {
      background: #fffbeb;
      border: 1.5px dashed #d97706;
    }

    .value-pill {
      font-size: 26px;
      font-weight: 800;
      padding: 6px 18px;
      border-radius: 10px;
      letter-spacing: -0.5px;
      transition: background-color 0.2s ease, color 0.2s ease;
    }

    .blue-pill {
      background: #e0f2fe;
      color: #0284c7;
      border: 2px solid #bae6fd;
    }

    .amber-pill {
      background: #fef3c7;
      color: #d97706;
      border: 2px solid #fde68a;
    }

    .equals-sign {
      font-size: 32px;
      font-weight: 700;
      color: #94a3b8;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 0 4px;
    }

    .equals-sub {
      font-size: 11px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: #64748b;
      margin-top: -2px;
    }

    .label-group {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 2px;
    }

    .main-label {
      font-size: 14px;
      font-weight: 700;
    }

    .sub-label {
      font-size: 13px;
      color: #64748b;
      font-weight: 500;
    }

    .interactive-stepper {
      display: flex;
      gap: 8px;
      margin-top: 6px;
    }

    .step-btn {
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 600;
      border: 1.5px solid #e2e8f0;
      background: #f8fafc;
      color: #64748b;
      border-radius: 8px;
      cursor: pointer;
      user-select: none;
      transition: all 0.2s ease;
    }

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

    svg {
      overflow: visible;
    }
  </style>
</head>
<body>

  <div class="scale-container">
    <div class="diagram-row">
      
      
      <div class="side-col">
        <div class="visual-box drawing-visual">
          <svg id="rulerSvg" width="120" height="70" viewBox="0 0 120 70">
            
            <rect x="10" y="5" width="100" height="60" rx="4" fill="#ffffff" stroke="#bae6fd" stroke-width="1.5" />
            <path d="M 10 25 L 110 25 M 10 45 L 110 45 M 35 5 L 35 65 M 60 5 L 60 65 M 85 5 L 85 65" stroke="#e0f2fe" stroke-width="1" />
            
            <rect x="15" y="32" width="90" height="24" rx="3" fill="#38bdf8" fill-opacity="0.2" stroke="#0284c7" stroke-width="1.5" />
            
            <line x1="25" y1="32" x2="25" y2="44" stroke="#0284c7" stroke-width="2" />
            <line x1="40" y1="32" x2="40" y2="39" stroke="#0284c7" stroke-width="1.5" />
            <line x1="55" y1="32" x2="55" y2="44" stroke="#0284c7" stroke-width="2" />
            <line x1="70" y1="32" x2="70" y2="39" stroke="#0284c7" stroke-width="1.5" />
            <line x1="85" y1="32" x2="85" y2="44" stroke="#0284c7" stroke-width="2" />
            
            <path id="rulerBracket" d="M 25 24 L 25 18 L 55 18 L 55 24" fill="none" stroke="#0284c7" stroke-width="1.5" />
            <text id="rulerSvgText" x="40" y="14" text-anchor="middle" font-size="11" font-weight="700" fill="#0284c7">1 in</text>
          </svg>
        </div>

        <div id="leftVal" class="value-pill blue-pill">1 in</div>

        <div class="label-group">
          <span class="main-label" style="color: #0284c7;">Drawing Length</span>
          <span class="sub-label">(Paper)</span>
        </div>
      </div>

      
      <div class="equals-sign">
        <span>=</span>
        <span class="equals-sub">matches</span>
      </div>

      
      <div class="side-col">
        <div class="visual-box real-visual">
          <svg width="120" height="90" viewBox="0 0 120 90">
            
            <line x1="15" y1="82" x2="105" y2="82" stroke="#d97706" stroke-width="2" stroke-linecap="round" />
            
            
            
            <circle cx="50" cy="20" r="7" fill="#d97706" />
            
            <rect x="44" y="29" width="12" height="24" rx="4" fill="#d97706" />
            
            <line x1="47" y1="52" x2="46" y2="80" stroke="#d97706" stroke-width="4" stroke-linecap="round" />
            <line x1="53" y1="52" x2="54" y2="80" stroke="#d97706" stroke-width="4" stroke-linecap="round" />

            
            <path d="M 72 13 L 78 13 L 78 82 L 72 82" fill="none" stroke="#d97706" stroke-width="1.5" />
            <text id="personSvgText" x="96" y="52" text-anchor="middle" font-size="12" font-weight="700" fill="#d97706">5 ft</text>
          </svg>
        </div>

        <div id="rightVal" class="value-pill amber-pill">5 ft</div>

        <div class="label-group">
          <span class="main-label" style="color: #d97706;">Actual Length</span>
          <span class="sub-label">(Real World)</span>
        </div>
      </div>

    </div>

    
    <div class="interactive-stepper">
      <button class="step-btn active" onclick="setScale(1)">1× Scale</button>
      <button class="step-btn" onclick="setScale(2)">2× Scale</button>
      <button class="step-btn" onclick="setScale(3)">3× Scale</button>
    </div>
  </div>

  <script>
    function setScale(multiplier) {
      const inVal = multiplier;
      const ftVal = multiplier * 5;

      document.getElementById('leftVal').textContent = inVal + ' in';
      document.getElementById('rightVal').textContent = ftVal + ' ft';
      document.getElementById('rulerSvgText').textContent = inVal + ' in';
      document.getElementById('personSvgText').textContent = ftVal + ' ft';

      // Update ruler bracket width
      const endX = 25 + (multiplier * 30);
      const midX = (25 + endX) / 2;
      document.getElementById('rulerBracket').setAttribute('d', `M 25 24 L 25 18 L ${endX} 18 L ${endX} 24`);
      document.getElementById('rulerSvgText').setAttribute('x', midX);

      // Button state
      const btns = document.querySelectorAll('.step-btn');
      btns.forEach((btn, idx) => {
        btn.classList.toggle('active', idx + 1 === multiplier);
      });
    }
  </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;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      -webkit-tap-highlight-color: transparent;
    }

    body {
      background: #f8fafc;
      color: #1e2945;
      padding: 10px 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-start;
      min-height: 100%;
    }

    .header {
      text-align: center;
      margin-bottom: 8px;
    }

    .header h1 {
      font-size: 17px;
      font-weight: 700;
      color: #0f172a;
      letter-spacing: -0.01em;
    }

    .btn-bar {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 6px;
      margin-bottom: 10px;
    }

    .filter-btn {
      appearance: none;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: #475569;
      padding: 5px 11px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
      cursor: pointer;
      box-shadow: 0 1px 2px rgba(0,0,0,0.04);
      transition: all 0.25s ease;
    }

    .filter-btn.active {
      background: #0891b2;
      border-color: #0891b2;
      color: #ffffff;
      box-shadow: 0 2px 6px rgba(8, 145, 178, 0.35);
    }

    .grid-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      width: 100%;
      max-width: 680px;
    }

    @media (max-width: 480px) {
      .grid-container {
        grid-template-columns: 1fr;
        gap: 10px;
      }
    }

    .prism-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 10px;
      box-shadow: 0 2px 6px rgba(15, 23, 42, 0.04);
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .prism-title {
      font-size: 14px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 4px;
      display: flex;
      align-items: center;
      gap: 5px;
    }

    .svg-wrap {
      width: 100%;
      max-width: 220px;
      height: 145px;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
    }

    svg {
      width: 100%;
      height: 100%;
      overflow: visible;
    }

    /* SVG Base Styles & Transitions */
    .face-base {
      fill: rgba(6, 182, 212, 0.45);
      stroke: #0891b2;
      stroke-width: 1.8;
      stroke-linejoin: round;
      transition: all 0.3s ease;
    }

    .face-lat {
      fill: rgba(226, 232, 240, 0.55);
      stroke: #94a3b8;
      stroke-width: 1.2;
      stroke-linejoin: round;
      transition: all 0.3s ease;
    }

    .edge-solid {
      stroke: #475569;
      stroke-width: 1.5;
      stroke-linecap: round;
      stroke-linejoin: round;
      transition: all 0.3s ease;
    }

    .edge-dash {
      stroke: #94a3b8;
      stroke-width: 1.4;
      stroke-dasharray: 4, 3;
      stroke-linecap: round;
      transition: all 0.3s ease;
    }

    .vertex {
      fill: #0e7490;
      stroke: #ffffff;
      stroke-width: 1.5;
      r: 3.5;
      transition: all 0.3s ease;
    }

    .callout-line {
      stroke: #0891b2;
      stroke-width: 1.2;
      stroke-dasharray: 2, 2;
    }

    .callout-text {
      font-size: 10.5px;
      font-weight: 700;
      fill: #0e7490;
    }

    /* Interactive Filter Highlights */
    .state-bases .face-base {
      fill: rgba(6, 182, 212, 0.85);
      stroke: #0284c7;
      stroke-width: 2.6;
      filter: drop-shadow(0 0 5px rgba(6, 182, 212, 0.55));
    }
    .state-bases .face-lat {
      fill: rgba(241, 245, 249, 0.2);
      stroke: rgba(148, 163, 184, 0.3);
    }
    .state-bases .edge-solid,
    .state-bases .edge-dash {
      opacity: 0.35;
    }
    .state-bases .vertex {
      opacity: 0.25;
    }

    .state-lateral .face-lat {
      fill: rgba(245, 158, 11, 0.65);
      stroke: #d97706;
      stroke-width: 2.2;
      filter: drop-shadow(0 0 5px rgba(245, 158, 11, 0.45));
    }
    .state-lateral .face-base {
      fill: rgba(6, 182, 212, 0.15);
      stroke: rgba(8, 145, 178, 0.3);
    }
    .state-lateral .edge-solid,
    .state-lateral .edge-dash {
      opacity: 0.4;
    }
    .state-lateral .vertex {
      opacity: 0.25;
    }

    .state-vertices .vertex {
      fill: #f43f5e;
      stroke: #ffffff;
      stroke-width: 2;
      r: 5.5;
      animation: pulse 1.2s infinite ease-in-out;
    }
    .state-vertices .face-base {
      fill: rgba(6, 182, 212, 0.12);
      stroke: rgba(8, 145, 178, 0.25);
    }
    .state-vertices .face-lat {
      fill: rgba(226, 232, 240, 0.2);
      stroke: rgba(148, 163, 184, 0.25);
    }
    .state-vertices .edge-solid,
    .state-vertices .edge-dash {
      opacity: 0.35;
    }

    .state-edges .edge-solid {
      stroke: #2563eb;
      stroke-width: 2.8;
    }
    .state-edges .edge-dash {
      stroke: #3b82f6;
      stroke-width: 2.4;
      stroke-dasharray: 4, 3;
    }
    .state-edges .face-base {
      fill: rgba(6, 182, 212, 0.1);
      stroke: #2563eb;
      stroke-width: 2.8;
    }
    .state-edges .face-lat {
      fill: rgba(226, 232, 240, 0.15);
      stroke: #2563eb;
      stroke-width: 2.8;
    }
    .state-edges .vertex {
      opacity: 0.3;
    }

    @keyframes pulse {
      0%, 100% { transform: scale(1); }
      50% { transform: scale(1.25); }
    }

    /* Data Table / Badges */
    .data-box {
      width: 100%;
      margin-top: 6px;
      display: flex;
      flex-direction: column;
      gap: 4px;
      font-size: 11.5px;
    }

    .info-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 3px 8px;
      border-radius: 6px;
      background: #f8fafc;
      border: 1px solid #edf2f7;
      transition: all 0.25s ease;
    }

    .info-label {
      color: #64748b;
      font-weight: 500;
    }

    .info-val {
      font-weight: 700;
      color: #0f172a;
    }

    .stat-pills {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 4px;
      margin-top: 2px;
      text-align: center;
    }

    .pill {
      padding: 4px 2px;
      border-radius: 6px;
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
      font-size: 11px;
      font-weight: 600;
      color: #334155;
      transition: all 0.25s ease;
    }

    .pill span {
      display: block;
      font-size: 13px;
      font-weight: 800;
      color: #0f172a;
    }

    /* Active Highlight States on Info Rows */
    .state-bases .row-bases {
      background: #e0f2fe;
      border-color: #bae6fd;
      color: #0369a1;
    }
    .state-bases .row-bases .info-val {
      color: #0284c7;
    }

    .state-lateral .row-lateral {
      background: #fef3c7;
      border-color: #fde68a;
      color: #92400e;
    }
    .state-lateral .row-lateral .info-val {
      color: #b45309;
    }

    .state-vertices .pill-vertices {
      background: #ffe4e6;
      border-color: #fecdd3;
      color: #be123c;
    }
    .state-vertices .pill-vertices span {
      color: #e11d48;
    }

    .state-edges .pill-edges {
      background: #dbeafe;
      border-color: #bfdbfe;
      color: #1d4ed8;
    }
    .state-edges .pill-edges span {
      color: #2563eb;
    }
  </style>
</head>
<body>

  <div class="header">
    <h1>Parts of a Prism: Named by Their Bases</h1>
  </div>

  <div class="btn-bar" id="filterBar">
    <button class="filter-btn active" onclick="setMode('overview', this)">Overview</button>
    <button class="filter-btn" onclick="setMode('bases', this)">Bases Only</button>
    <button class="filter-btn" onclick="setMode('lateral', this)">Lateral Faces</button>
    <button class="filter-btn" onclick="setMode('edges', this)">Edges</button>
    <button class="filter-btn" onclick="setMode('vertices', this)">Vertices</button>
  </div>

  <div class="grid-container state-overview" id="diagramRoot">

    
    <div class="prism-card">
      <div class="prism-title">Triangular Prism</div>
      
      <div class="svg-wrap">
        <svg viewBox="0 0 220 150">
          <defs>
            
            <filter id="glow" x="-20%" y="-20%" width="140%" height="140%">
              <feGaussianBlur stdDeviation="1.5" result="blur" />
              <feComposite in="SourceGraphic" in2="blur" operator="over" />
            </filter>
          </defs>

          
          <polygon class="face-lat" points="110,24 55,56 55,124 110,92" />
          <polygon class="face-lat" points="110,24 165,56 165,124 110,92" />

          
          <line class="edge-dash" x1="110" y1="24" x2="110" y2="92" />
          <line class="edge-dash" x1="110" y1="92" x2="55" y2="124" />
          <line class="edge-dash" x1="110" y1="92" x2="165" y2="124" />

          
          <polygon class="face-base" points="110,92 55,124 165,124" />

          
          <polygon class="face-lat" points="55,56 165,56 165,124 55,124" />

          
          <polygon class="face-base" points="110,24 55,56 165,56" />

          
          <line class="edge-solid" x1="110" y1="24" x2="55" y2="56" />
          <line class="edge-solid" x1="110" y1="24" x2="165" y2="56" />
          <line class="edge-solid" x1="55" y1="56" x2="165" y2="56" />
          <line class="edge-solid" x1="55" y1="56" x2="55" y2="124" />
          <line class="edge-solid" x1="165" y1="56" x2="165" y2="124" />
          <line class="edge-solid" x1="55" y1="124" x2="165" y2="124" />

          
          <g>
            <circle class="vertex" cx="110" cy="24" />
            <circle class="vertex" cx="55" cy="56" />
            <circle class="vertex" cx="165" cy="56" />
            <circle class="vertex" cx="110" cy="92" />
            <circle class="vertex" cx="55" cy="124" />
            <circle class="vertex" cx="165" cy="124" />
          </g>

          
          <line class="callout-line" x1="110" y1="24" x2="185" y2="16" />
          <text class="callout-text" x="146" y="12">Base 1: Triangle</text>

          <line class="callout-line" x1="165" y1="124" x2="195" y2="140" />
          <text class="callout-text" x="120" y="146">Base 2: Triangle</text>
        </svg>
      </div>

      <div class="data-box">
        <div class="info-row row-bases">
          <span class="info-label">Base Shape</span>
          <span class="info-val">2 Triangles</span>
        </div>
        <div class="info-row row-lateral">
          <span class="info-label">Lateral Faces</span>
          <span class="info-val">3 Rectangles</span>
        </div>
        <div class="stat-pills">
          <div class="pill">Faces <span>5</span></div>
          <div class="pill pill-vertices">Vertices <span>6</span></div>
          <div class="pill pill-edges">Edges <span>9</span></div>
        </div>
      </div>
    </div>

    
    <div class="prism-card">
      <div class="prism-title">Rectangular Prism</div>
      
      <div class="svg-wrap">
        <svg viewBox="0 0 220 150">
          
          <polygon class="face-lat" points="110,18 45,42 45,108 110,84" />
          <polygon class="face-lat" points="110,18 175,42 175,108 110,84" />

          
          <line class="edge-dash" x1="110" y1="18" x2="110" y2="84" />
          <line class="edge-dash" x1="110" y1="84" x2="45" y2="108" />
          <line class="edge-dash" x1="110" y1="84" x2="175" y2="108" />

          
          <polygon class="face-base" points="110,84 175,108 110,132 45,108" />

          
          <polygon class="face-lat" points="45,42 110,66 110,132 45,108" />
          <polygon class="face-lat" points="110,66 175,42 175,108 110,132" />

          
          <polygon class="face-base" points="110,18 175,42 110,66 45,42" />

          
          <line class="edge-solid" x1="110" y1="18" x2="45" y2="42" />
          <line class="edge-solid" x1="110" y1="18" x2="175" y2="42" />
          <line class="edge-solid" x1="45" y1="42" x2="110" y2="66" />
          <line class="edge-solid" x1="175" y1="42" x2="110" y2="66" />
          <line class="edge-solid" x1="45" y1="42" x2="45" y2="108" />
          <line class="edge-solid" x1="110" y1="66" x2="110" y2="132" />
          <line class="edge-solid" x1="175" y1="42" x2="175" y2="108" />
          <line class="edge-solid" x1="45" y1="108" x2="110" y2="132" />
          <line class="edge-solid" x1="175" y1="108" x2="110" y2="132" />

          
          <g>
            <circle class="vertex" cx="110" cy="18" />
            <circle class="vertex" cx="45" cy="42" />
            <circle class="vertex" cx="175" cy="42" />
            <circle class="vertex" cx="110" cy="66" />
            <circle class="vertex" cx="110" cy="84" />
            <circle class="vertex" cx="45" cy="108" />
            <circle class="vertex" cx="175" cy="108" />
            <circle class="vertex" cx="110" cy="132" />
          </g>

          
          <line class="callout-line" x1="110" y1="18" x2="185" y2="12" />
          <text class="callout-text" x="136" y="10">Base 1: Rectangle</text>

          <line class="callout-line" x1="110" y1="132" x2="185" y2="144" />
          <text class="callout-text" x="108" y="146">Base 2: Rectangle</text>
        </svg>
      </div>

      <div class="data-box">
        <div class="info-row row-bases">
          <span class="info-label">Base Shape</span>
          <span class="info-val">2 Rectangles</span>
        </div>
        <div class="info-row row-lateral">
          <span class="info-label">Lateral Faces</span>
          <span class="info-val">4 Rectangles</span>
        </div>
        <div class="stat-pills">
          <div class="pill">Faces <span>6</span></div>
          <div class="pill pill-vertices">Vertices <span>8</span></div>
          <div class="pill pill-edges">Edges <span>12</span></div>
        </div>
      </div>
    </div>

  </div>

  <script>
    function setMode(mode, btnElement) {
      // Update active button state
      const buttons = document.querySelectorAll('.filter-btn');
      buttons.forEach(btn => btn.classList.remove('active'));
      if (btnElement) {
        btnElement.classList.add('active');
      }

      // Update root state class for CSS transitions
      const root = document.getElementById('diagramRoot');
      root.className = 'grid-container state-' + mode;
    }
  </script>
</body>
</html>

Classifying Prisms, Pyramids, Cylinders, Cones, and Spheres

<!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;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    }

    body {
      background: transparent;
      color: #0f172a;
      padding: 10px 12px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    /* Top Selector */
    .toolbar {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 6px;
    }

    .pill-btn {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      color: #475569;
      font-size: 13px;
      font-weight: 600;
      padding: 5px 12px;
      border-radius: 9999px;
      cursor: pointer;
      transition: all 0.25s ease;
      user-select: none;
    }

    .pill-btn:hover {
      background: #e2e8f0;
      color: #0f172a;
    }

    .pill-btn.active {
      background: #0284c7;
      border-color: #0284c7;
      color: #ffffff;
      box-shadow: 0 2px 6px rgba(2, 132, 199, 0.35);
    }

    /* Side-by-side Columns */
    .comparison-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    @media (max-width: 460px) {
      .comparison-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }
    }

    .pyramid-col {
      display: flex;
      flex-direction: column;
      align-items: center;
      background: #f8fafc;
      border-radius: 12px;
      padding: 8px 10px 10px;
      border: 1px solid #e2e8f0;
    }

    .col-header {
      font-size: 14px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 2px;
      text-align: center;
    }

    .col-sub {
      font-size: 11px;
      color: #64748b;
      margin-bottom: 4px;
    }

    .svg-wrap {
      width: 100%;
      max-width: 220px;
      height: 140px;
    }

    svg {
      width: 100%;
      height: 100%;
      overflow: visible;
    }

    /* Property Badges */
    .badges-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 5px;
      width: 100%;
      margin-top: 8px;
    }

    .badge {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 4px 6px;
      font-size: 11px;
      color: #334155;
      text-align: center;
      transition: all 0.25s ease;
    }

    .badge-val {
      font-weight: 700;
      color: #0f172a;
      display: block;
      font-size: 12px;
    }

    .badge.highlight {
      background: #eff6ff;
      border-color: #38bdf8;
      box-shadow: 0 0 0 1.5px #0284c7;
      color: #0369a1;
    }
    .badge.highlight .badge-val {
      color: #0284c7;
    }

    /* SVG Interactive Elements */
    .geo-base {
      fill: #f97316;
      fill-opacity: 0.28;
      transition: all 0.3s ease;
    }

    .geo-face-l {
      fill: #38bdf8;
      fill-opacity: 0.22;
      transition: all 0.3s ease;
    }

    .geo-face-r {
      fill: #0284c7;
      fill-opacity: 0.32;
      transition: all 0.3s ease;
    }

    .geo-face-front {
      fill: #0ea5e9;
      fill-opacity: 0.18;
      transition: all 0.3s ease;
    }

    .geo-edge {
      stroke: #0f172a;
      stroke-width: 2;
      stroke-linecap: round;
      stroke-linejoin: round;
      transition: all 0.3s ease;
    }

    .geo-edge-hidden {
      stroke: #94a3b8;
      stroke-width: 1.5;
      stroke-dasharray: 4,3;
      transition: all 0.3s ease;
    }

    .geo-apex {
      fill: #ef4444;
      stroke: #ffffff;
      stroke-width: 1.5;
      transition: all 0.3s ease;
    }

    .geo-vertex {
      fill: #0f172a;
      stroke: #ffffff;
      stroke-width: 1.5;
      opacity: 0;
      transition: all 0.3s ease;
    }

    .apex-label {
      font-size: 10px;
      font-weight: 700;
      fill: #b91c1c;
      transition: all 0.3s ease;
    }

    /* State Highlighting */
    .mode-base .geo-base {
      fill-opacity: 0.65;
      filter: drop-shadow(0 0 3px rgba(249, 115, 22, 0.5));
    }
    .mode-base .geo-face-l,
    .mode-base .geo-face-r,
    .mode-base .geo-face-front {
      fill-opacity: 0.06;
    }

    .mode-apex .geo-apex {
      r: 6;
      fill: #dc2626;
      filter: drop-shadow(0 0 5px rgba(239, 68, 68, 0.8));
    }
    .mode-apex .apex-label {
      font-size: 11px;
      fill: #ef4444;
    }

    .mode-faces .geo-face-l { fill-opacity: 0.45; }
    .mode-faces .geo-face-r { fill-opacity: 0.55; }
    .mode-faces .geo-face-front { fill-opacity: 0.35; }
    .mode-faces .geo-base { fill-opacity: 0.35; }

    .mode-edges .geo-edge {
      stroke: #0284c7;
      stroke-width: 3.2;
    }
    .mode-edges .geo-edge-hidden {
      stroke: #38bdf8;
      stroke-width: 2.2;
    }

    .mode-vertices .geo-vertex {
      opacity: 1;
      r: 4.5;
      fill: #0284c7;
    }
    .mode-vertices .geo-apex {
      r: 5.5;
      fill: #ef4444;
    }

    /* Bottom Rule Callout */
    .rule-callout {
      background: #f0fdf4;
      border: 1px solid #bbf7d0;
      border-radius: 8px;
      padding: 6px 12px;
      font-size: 12px;
      color: #166534;
      text-align: center;
      font-weight: 500;
    }
    .rule-callout strong {
      color: #14532d;
      font-weight: 700;
    }
  </style>
</head>
<body>

  
  <div class="toolbar" id="toolbar">
    <button class="pill-btn active" data-mode="all">All Parts</button>
    <button class="pill-btn" data-mode="base">Base</button>
    <button class="pill-btn" data-mode="apex">Apex</button>
    <button class="pill-btn" data-mode="faces">Faces</button>
    <button class="pill-btn" data-mode="edges">Edges</button>
    <button class="pill-btn" data-mode="vertices">Vertices</button>
  </div>

  
  <div class="comparison-grid" id="modelsGrid">

    
    <div class="pyramid-col">
      <div class="col-header">Square Pyramid</div>
      <div class="col-sub">Quadrilateral Base</div>
      <div class="svg-wrap">
        <svg viewBox="0 0 200 140" id="svgSquare">
          
          <polygon class="geo-base" points="40,95 24,124 140,132 166,104" />

          
          <polygon class="geo-face-l" points="98,18 40,95 24,124" />
          <polygon class="geo-face-front" points="98,18 24,124 140,132" />
          <polygon class="geo-face-r" points="98,18 140,132 166,104" />

          
          <line class="geo-edge-hidden" x1="40" y1="95" x2="166" y2="104" />
          <line class="geo-edge-hidden" x1="40" y1="95" x2="24" y2="124" />
          <line class="geo-edge-hidden" x1="98" y1="18" x2="40" y2="95" />

          
          <line class="geo-edge" x1="24" y1="124" x2="140" y2="132" />
          <line class="geo-edge" x1="140" y1="132" x2="166" y2="104" />
          <line class="geo-edge" x1="98" y1="18" x2="24" y2="124" />
          <line class="geo-edge" x1="98" y1="18" x2="140" y2="132" />
          <line class="geo-edge" x1="98" y1="18" x2="166" y2="104" />

          
          <circle class="geo-vertex" cx="40" cy="95" r="3.5" />
          <circle class="geo-vertex" cx="24" cy="124" r="3.5" />
          <circle class="geo-vertex" cx="140" cy="132" r="3.5" />
          <circle class="geo-vertex" cx="166" cy="104" r="3.5" />

          
          <line x1="98" y1="18" x2="125" y2="14" stroke="#ef4444" stroke-width="1" stroke-dasharray="2,2" />
          <text x="128" y="17" class="apex-label">Apex</text>
          <circle class="geo-apex" cx="98" cy="18" r="4.5" />
        </svg>
      </div>

      
      <div class="badges-grid">
        <div class="badge" data-part="base">
          <span class="badge-val">1 Square</span> Base (4 sides)
        </div>
        <div class="badge" data-part="faces">
          <span class="badge-val">5 Faces</span> 1 base + 4 sides
        </div>
        <div class="badge" data-part="vertices apex">
          <span class="badge-val">5 Vertices</span> 4 base + 1 apex
        </div>
        <div class="badge" data-part="edges">
          <span class="badge-val">8 Edges</span> 4 base + 4 sides
        </div>
      </div>
    </div>

    
    <div class="pyramid-col">
      <div class="col-header">Triangular Pyramid</div>
      <div class="col-sub">Tetrahedron (3-sided base)</div>
      <div class="svg-wrap">
        <svg viewBox="0 0 200 140" id="svgTriangle">
          
          <polygon class="geo-base" points="30,124 165,124 106,94" />

          
          <polygon class="geo-face-l" points="98,18 30,124 106,94" />
          <polygon class="geo-face-r" points="98,18 106,94 165,124" />
          <polygon class="geo-face-front" points="98,18 30,124 165,124" />

          
          <line class="geo-edge-hidden" x1="98" y1="18" x2="106" y2="94" />
          <line class="geo-edge-hidden" x1="30" y1="124" x2="106" y2="94" />
          <line class="geo-edge-hidden" x1="165" y1="124" x2="106" y2="94" />

          
          <line class="geo-edge" x1="30" y1="124" x2="165" y2="124" />
          <line class="geo-edge" x1="98" y1="18" x2="30" y2="124" />
          <line class="geo-edge" x1="98" y1="18" x2="165" y2="124" />

          
          <circle class="geo-vertex" cx="30" cy="124" r="3.5" />
          <circle class="geo-vertex" cx="165" cy="124" r="3.5" />
          <circle class="geo-vertex" cx="106" cy="94" r="3.5" />

          
          <line x1="98" y1="18" x2="125" y2="14" stroke="#ef4444" stroke-width="1" stroke-dasharray="2,2" />
          <text x="128" y="17" class="apex-label">Apex</text>
          <circle class="geo-apex" cx="98" cy="18" r="4.5" />
        </svg>
      </div>

      
      <div class="badges-grid">
        <div class="badge" data-part="base">
          <span class="badge-val">1 Triangle</span> Base (3 sides)
        </div>
        <div class="badge" data-part="faces">
          <span class="badge-val">4 Faces</span> 1 base + 3 sides
        </div>
        <div class="badge" data-part="vertices apex">
          <span class="badge-val">4 Vertices</span> 3 base + 1 apex
        </div>
        <div class="badge" data-part="edges">
          <span class="badge-val">6 Edges</span> 3 base + 3 sides
        </div>
      </div>
    </div>

  </div>

  
  <div class="rule-callout">
    <strong>Pyramid Rule (<em>n</em>-sided base):</strong> Faces = <strong><em>n</em> + 1</strong> &nbsp;|&nbsp; Vertices = <strong><em>n</em> + 1</strong> &nbsp;|&nbsp; Edges = <strong>2<em>n</em></strong>
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</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">
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</head>
<body>

  <div class="diagram-grid">
    
    <div class="solid-col">
      <div class="solid-title">Cylinder</div>
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          <ellipse cx="60" cy="94" rx="42" ry="14" fill="none" stroke="#0284c7" stroke-width="2" stroke-dasharray="3,3" opacity="0.6"/>
          
          
          <path d="M 18 94 L 60 18 L 102 94 A 42 14 0 0 1 18 94 Z" fill="url(#coneGrad)" stroke="#b45309" stroke-width="1.5" stroke-linejoin="round"/>
          
          
          <path d="M 18 94 A 42 14 0 0 0 102 94" fill="none" stroke="#0284c7" stroke-width="2.5"/>
          
          
          <circle cx="60" cy="18" r="4.5" fill="#ea580c" stroke="#ffffff" stroke-width="1.5"/>
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      </div>
      <div class="chip-list">
        <div class="chip chip-blue">1 Flat Base</div>
        <div class="chip chip-amber">1 Curved Surface</div>
        <div class="chip chip-coral">1 Apex Point</div>
      </div>
    </div>

    
    <div class="solid-col">
      <div class="solid-title">Sphere</div>
      <div class="svg-wrap">
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          <circle cx="60" cy="60" r="44" fill="url(#sphereGrad)" stroke="#b45309" stroke-width="1.5"/>
          
          
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          <line x1="60" y1="60" x2="98" y2="45" stroke="#0f172a" stroke-width="1.5" stroke-linecap="round" stroke-dasharray="2,2"/>
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          <circle cx="98" cy="45" r="2" fill="#0f172a"/>
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      <div class="chip-list">
        <div class="chip chip-amber">1 Curved Surface</div>
        <div class="chip chip-slate">0 Flat Faces</div>
        <div class="chip chip-slate">Equal Radius (r)</div>
      </div>
    </div>
  </div>

  
  <div class="legend-bar">
    <div class="legend-item">
      <span class="swatch swatch-blue"></span>
      <span>Flat Face</span>
    </div>
    <div class="legend-item">
      <span class="swatch swatch-amber"></span>
      <span>Curved Surface</span>
    </div>
    <div class="legend-item">
      <span class="swatch swatch-coral"></span>
      <span>Apex Point</span>
    </div>
  </div>

</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="1:1">
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</head>
<body>

  
  <div class="nav-bar" role="tablist">
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    <button id="btn-face" class="tab-btn" onclick="setHighlight('face')">Face</button>
    <button id="btn-edge" class="tab-btn" onclick="setHighlight('edge')">Edge</button>
    <button id="btn-vertex" class="tab-btn" onclick="setHighlight('vertex')">Vertex</button>
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        <line x1="170" y1="40" x2="170" y2="125" />
        <line x1="110" y1="160" x2="170" y2="125" />
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        <path d="M 276,48 L 246,48 L 235,66" fill="none" stroke="#ea580c" stroke-width="1.75" marker-end="url(#arrow-orange)" />
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    </svg>
  </div>

  
  <div class="stats-row">
    <div id="card-face" class="stat-card" onclick="setHighlight('face')">
      <div class="stat-val" style="color: #0284c7;">6</div>
      <div class="stat-name">Faces</div>
    </div>
    <div id="card-edge" class="stat-card" onclick="setHighlight('edge')">
      <div class="stat-val" style="color: #7c3aed;">12</div>
      <div class="stat-name">Edges</div>
    </div>
    <div id="card-vertex" class="stat-card" onclick="setHighlight('vertex')">
      <div class="stat-val" style="color: #ea580c;">8</div>
      <div class="stat-name">Vertices</div>
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      document.getElementById('card-vertex').classList.toggle('vertex-active', type === 'vertex');
    }
  </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, sans-serif;
      color: #1e2945;
      background: #ffffff;
      padding: 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
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    .grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      width: 100%;
      max-width: 600px;
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      flex-direction: column;
      gap: 8px;
      border-radius: 12px;
      padding: 10px;
      transition: background 0.2s ease;
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    .col-poly {
      background: #f0fdf4;
      border: 1px solid #bbf7d0;
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    .col-curved {
      background: #faf5ff;
      border: 1px solid #e9d5ff;
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    .header {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
      text-align: center;
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    .badge {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 20px;
      letter-spacing: 0.2px;
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    .badge-poly {
      background: #dcfce7;
      color: #166534;
      border: 1px solid #86efac;
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    .badge-curved {
      background: #f3e8ff;
      color: #6b21a8;
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      font-size: 11px;
      font-weight: 600;
      opacity: 0.75;
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      letter-spacing: 0.5px;
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      gap: 6px;
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      border-radius: 8px;
      padding: 6px 8px;
      display: flex;
      align-items: center;
      gap: 10px;
      border: 1px solid rgba(0,0,0,0.06);
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
      cursor: pointer;
      user-select: none;
      transition: transform 0.15s ease, box-shadow 0.15s ease;
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    .shape-card:active {
      transform: scale(0.98);
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    .shape-card.active {
      box-shadow: 0 0 0 2px #22b7ff;
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    .svg-box {
      width: 48px;
      height: 48px;
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    .shape-name {
      font-size: 12px;
      font-weight: 600;
      color: #1e2945;
      line-height: 1.2;
    }

    svg {
      width: 100%;
      height: 100%;
      overflow: visible;
    }

    .solid-edge {
      stroke: #1e2945;
      stroke-width: 1.8;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    .hidden-edge {
      stroke: #1e2945;
      stroke-width: 1.4;
      stroke-linecap: round;
      stroke-linejoin: round;
      stroke-dasharray: 3 2.5;
      opacity: 0.45;
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    .face-poly-1 { fill: #86efac; fill-opacity: 0.25; }
    .face-poly-2 { fill: #4ade80; fill-opacity: 0.45; }
    .face-poly-top { fill: #bbf7d0; fill-opacity: 0.55; }

    .face-curved-1 { fill: #d8b4fe; fill-opacity: 0.25; }
    .face-curved-2 { fill: #c084fc; fill-opacity: 0.4; }
    .face-curved-top { fill: #e9d5ff; fill-opacity: 0.6; }
  </style>
</head>
<body>

  <div class="grid">
    
    <div class="column col-poly">
      <div class="header">
        <span class="badge badge-poly">Polyhedra</span>
        <span class="subtitle">Flat Faces</span>
      </div>

      <div class="shapes-wrap">
        
        <div class="shape-card">
          <div class="svg-box">
            <svg viewBox="0 0 100 100">
              
              <line class="hidden-edge" x1="48" y1="52" x2="16" y2="68" />
              <line class="hidden-edge" x1="48" y1="52" x2="88" y2="60" />
              <line class="hidden-edge" x1="48" y1="52" x2="68" y2="16" />
              
              
              <polygon class="face-poly-top" points="36,32 68,16 88,60 56,76" />
              <polygon class="face-poly-1" points="16,68 36,32 56,76" />
              
              
              <line class="solid-edge" x1="16" y1="68" x2="36" y2="32" />
              <line class="solid-edge" x1="36" y1="32" x2="56" y2="76" />
              <line class="solid-edge" x1="56" y1="76" x2="16" y2="68" />

              <line class="solid-edge" x1="36" y1="32" x2="68" y2="16" />
              <line class="solid-edge" x1="56" y1="76" x2="88" y2="60" />
              <line class="solid-edge" x1="68" y1="16" x2="88" y2="60" />
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          </div>
          <div class="shape-name">Triangular<br>Prism</div>
        </div>

        
        <div class="shape-card">
          <div class="svg-box">
            <svg viewBox="0 0 100 100">
              
              <line class="hidden-edge" x1="50" y1="14" x2="50" y2="46" />
              <line class="hidden-edge" x1="16" y1="64" x2="50" y2="46" />
              <line class="hidden-edge" x1="84" y1="64" x2="50" y2="46" />

              
              <polygon class="face-poly-1" points="50,14 16,64 50,82" />
              <polygon class="face-poly-2" points="50,14 50,82 84,64" />

              
              <line class="solid-edge" x1="16" y1="64" x2="50" y2="82" />
              <line class="solid-edge" x1="50" y1="82" x2="84" y2="64" />
              <line class="solid-edge" x1="50" y1="14" x2="16" y2="64" />
              <line class="solid-edge" x1="50" y1="14" x2="50" y2="82" />
              <line class="solid-edge" x1="50" y1="14" x2="84" y2="64" />
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          </div>
          <div class="shape-name">Square<br>Pyramid</div>
        </div>
      </div>
    </div>

    
    <div class="column col-curved">
      <div class="header">
        <span class="badge badge-curved">Curved Solids</span>
        <span class="subtitle">Rounded</span>
      </div>

      <div class="shapes-wrap">
        
        <div class="shape-card">
          <div class="svg-box">
            <svg viewBox="0 0 100 100">
              
              <path class="face-curved-1" d="M 22 28 A 28 10 0 0 0 78 28 L 78 72 A 28 10 0 0 1 22 72 Z" />
              <ellipse class="face-curved-top" cx="50" cy="28" rx="28" ry="10" />

              
              <path class="hidden-edge" d="M 78 72 A 28 10 0 0 0 22 72" />
              <path class="solid-edge" d="M 22 72 A 28 10 0 0 0 78 72" fill="none" />
              <ellipse class="solid-edge" cx="50" cy="28" rx="28" ry="10" fill="none" />
              <line class="solid-edge" x1="22" y1="28" x2="22" y2="72" />
              <line class="solid-edge" x1="78" y1="28" x2="78" y2="72" />
            </svg>
          </div>
          <div class="shape-name">Cylinder</div>
        </div>

        
        <div class="shape-card">
          <div class="svg-box">
            <svg viewBox="0 0 100 100">
              
              <path class="face-curved-1" d="M 50 16 L 22 72 A 28 10 0 0 0 78 72 Z" />

              
              <path class="hidden-edge" d="M 78 72 A 28 10 0 0 0 22 72" />
              <path class="solid-edge" d="M 22 72 A 28 10 0 0 0 78 72" fill="none" />
              <line class="solid-edge" x1="50" y1="16" x2="22" y2="72" />
              <line class="solid-edge" x1="50" y1="16" x2="78" y2="72" />
            </svg>
          </div>
          <div class="shape-name">Cone</div>
        </div>

        
        <div class="shape-card">
          <div class="svg-box">
            <svg viewBox="0 0 100 100">
              <defs>
                <radialGradient id="sphereGrad" cx="38%" cy="35%" r="60%">
                  <stop offset="0%" stop-color="#f3e8ff" />
                  <stop offset="70%" stop-color="#d8b4fe" stop-opacity="0.6" />
                  <stop offset="100%" stop-color="#a855f7" stop-opacity="0.4" />
                </radialGradient>
              </defs>
              <circle cx="50" cy="50" r="32" fill="url(#sphereGrad)" />
              <path class="hidden-edge" d="M 82 50 A 32 9 0 0 0 18 50" />
              <path class="solid-edge" d="M 18 50 A 32 9 0 0 0 82 50" fill="none" opacity="0.6" />
              <circle class="solid-edge" cx="50" cy="50" r="32" fill="none" />
            </svg>
          </div>
          <div class="shape-name">Sphere</div>
        </div>
      </div>
    </div>
  </div>

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</body>
</html>

OGM.7.GEO.9

Aligned learning resources

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