<!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;
      padding: 12px 14px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      min-height: 100%;
      user-select: none;
    }
    .header {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 8px;
      margin-bottom: 8px;
    }
    .title {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
    }
    .legend {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
    }
    .legend-item {
      display: flex;
      align-items: center;
      gap: 4px;
      font-size: 11px;
      font-weight: 600;
      color: #475569;
      background: #f8fafc;
      padding: 2px 6px;
      border-radius: 4px;
      border: 1px solid #e2e8f0;
    }
    .swatch {
      width: 10px;
      height: 10px;
      border-radius: 2px;
    }
    .swatch-supply { background: #64748b; }
    .swatch-demand { background: #1e2945; }
    .swatch-cracked { background: #0284c7; }

    .fractions-container {
      position: relative;
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin: 4px 0;
    }
    .fraction-card {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 7px 10px;
      position: relative;
    }
    .fraction-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 5px;
    }
    .fraction-label {
      font-size: 12px;
      font-weight: 700;
      color: #1e2945;
    }
    .fraction-sub {
      font-size: 11px;
      font-weight: 500;
      color: #64748b;
      margin-left: 4px;
    }
    .badge {
      font-size: 10px;
      font-weight: 700;
      padding: 2px 7px;
      border-radius: 999px;
      transition: all 0.4s ease;
    }
    .badge-deficit { background: #fee2e2; color: #b91c1c; }
    .badge-balanced { background: #dcfce7; color: #15803d; }
    .badge-surplus { background: #e0e7ff; color: #3730a3; }
    .badge-optimized { background: #dcfce7; color: #15803d; }

    .bar-row {
      display: flex;
      align-items: center;
      gap: 6px;
      margin-top: 3px;
    }
    .bar-title {
      font-size: 10px;
      font-weight: 600;
      color: #64748b;
      width: 46px;
      flex-shrink: 0;
    }
    .track {
      flex: 1;
      height: 12px;
      background: #e2e8f0;
      border-radius: 4px;
      overflow: hidden;
      display: flex;
      position: relative;
    }
    .bar-seg {
      height: 100%;
      transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .bar-supply { background: #64748b; }
    .bar-demand { background: #1e2945; }
    .bar-cracked {
      background: repeating-linear-gradient(
        -45deg,
        #0284c7,
        #0284c7 4px,
        #38bdf8 4px,
        #38bdf8 8px
      );
    }
    .val-label {
      font-size: 10px;
      font-weight: 700;
      color: #334155;
      width: 28px;
      text-align: right;
      flex-shrink: 0;
    }

    .transfer-arrow-layer {
      position: absolute;
      right: 36px;
      top: 14px;
      bottom: 14px;
      width: 40px;
      pointer-events: none;
      opacity: 0.2;
      transition: opacity 0.5s ease;
    }
    .transfer-arrow-layer.active {
      opacity: 1;
    }

    .controls {
      margin-top: 6px;
      display: flex;
      justify-content: center;
    }
    .btn-toggle {
      width: 100%;
      background: #0284c7;
      color: #ffffff;
      border: none;
      padding: 9px 16px;
      font-size: 13px;
      font-weight: 700;
      border-radius: 6px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      transition: background 0.2s ease, box-shadow 0.2s ease;
    }
    .btn-toggle:active {
      background: #0369a1;
    }
    .btn-toggle.reset {
      background: #475569;
    }
  </style>
</head>
<body>

  <div class="header">
    <div class="title">Refinery Supply vs Demand</div>
    <div class="legend">
      <div class="legend-item"><div class="swatch swatch-supply"></div>Supply</div>
      <div class="legend-item"><div class="swatch swatch-demand"></div>Demand</div>
      <div class="legend-item"><div class="swatch swatch-cracked"></div>Cracked</div>
    </div>
  </div>

  <div class="fractions-container">
    
    <div class="fraction-card">
      <div class="fraction-top">
        <div class="fraction-label">Short Fractions <span class="fraction-sub">Petrol (C1–C8)</span></div>
        <div id="badge-short" class="badge badge-deficit">-30% Deficit</div>
      </div>
      <div class="bar-row">
        <span class="bar-title">Supply</span>
        <div class="track">
          <div id="bar-short-supply" class="bar-seg bar-supply" style="width: 20%;"></div>
          <div id="bar-short-cracked" class="bar-seg bar-cracked" style="width: 0%;"></div>
        </div>
        <span id="val-short-supply" class="val-label">20%</span>
      </div>
      <div class="bar-row">
        <span class="bar-title">Demand</span>
        <div class="track">
          <div class="bar-seg bar-demand" style="width: 50%;"></div>
        </div>
        <span class="val-label">50%</span>
      </div>
    </div>

    
    <div class="fraction-card">
      <div class="fraction-top">
        <div class="fraction-label">Medium Fractions <span class="fraction-sub">Diesel (C9–C16)</span></div>
        <div class="badge badge-balanced">Balanced</div>
      </div>
      <div class="bar-row">
        <span class="bar-title">Supply</span>
        <div class="track">
          <div class="bar-seg bar-supply" style="width: 25%;"></div>
        </div>
        <span class="val-label">25%</span>
      </div>
      <div class="bar-row">
        <span class="bar-title">Demand</span>
        <div class="track">
          <div class="bar-seg bar-demand" style="width: 25%;"></div>
        </div>
        <span class="val-label">25%</span>
      </div>
    </div>

    
    <div class="fraction-card">
      <div class="fraction-top">
        <div class="fraction-label">Heavy Fractions <span class="fraction-sub">Bitumen (C17+)</span></div>
        <div id="badge-heavy" class="badge badge-surplus">+30% Surplus</div>
      </div>
      <div class="bar-row">
        <span class="bar-title">Supply</span>
        <div class="track">
          <div id="bar-heavy-supply" class="bar-seg bar-supply" style="width: 55%;"></div>
        </div>
        <span id="val-heavy-supply" class="val-label">55%</span>
      </div>
      <div class="bar-row">
        <span class="bar-title">Demand</span>
        <div class="track">
          <div class="bar-seg bar-demand" style="width: 25%;"></div>
        </div>
        <span class="val-label">25%</span>
      </div>
    </div>
  </div>

  <div class="controls">
    <button id="toggle-btn" class="btn-toggle">
      <span>⚡ Catalytic Cracking (C17+ → C1–C8)</span>
    </button>
  </div>

  <script>
    let cracked = false;

    const btn = document.getElementById('toggle-btn');
    const barShortCracked = document.getElementById('bar-short-cracked');
    const valShortSupply = document.getElementById('val-short-supply');
    const badgeShort = document.getElementById('badge-short');

    const barHeavySupply = document.getElementById('bar-heavy-supply');
    const valHeavySupply = document.getElementById('val-heavy-supply');
    const badgeHeavy = document.getElementById('badge-heavy');

    btn.addEventListener('click', () => {
      cracked = !cracked;
      if (cracked) {
        // Apply cracking
        barShortCracked.style.width = '30%';
        valShortSupply.textContent = '50%';
        badgeShort.textContent = 'Demand Met';
        badgeShort.className = 'badge badge-balanced';

        barHeavySupply.style.width = '25%';
        valHeavySupply.textContent = '25%';
        badgeHeavy.textContent = 'Optimized';
        badgeHeavy.className = 'badge badge-optimized';

        btn.innerHTML = '<span>↺ Reset to Raw Crude</span>';
        btn.classList.add('reset');
      } else {
        // Reset to raw
        barShortCracked.style.width = '0%';
        valShortSupply.textContent = '20%';
        badgeShort.textContent = '-30% Deficit';
        badgeShort.className = 'badge badge-deficit';

        barHeavySupply.style.width = '55%';
        valHeavySupply.textContent = '55%';
        badgeHeavy.textContent = '+30% Surplus';
        badgeHeavy.className = 'badge badge-surplus';

        btn.innerHTML = '<span>⚡ Catalytic Cracking (C17+ → C1–C8)</span>';
        btn.classList.remove('reset');
      }
    });
  </script>
</body>
</html>

Fractional Distillation, Thermal Cracking, and Catalytic Cracking

<!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%;
      background: #ffffff;
      color: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-start;
    }

    .nav-toggle {
      display: flex;
      background: #f1f5f9;
      padding: 4px;
      border-radius: 24px;
      margin-bottom: 12px;
      gap: 4px;
      border: 1px solid #e2e8f0;
    }

    .toggle-btn {
      border: none;
      background: transparent;
      color: #64748b;
      font-size: 14px;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 20px;
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .toggle-btn.active {
      background: #1e2945;
      color: #ffffff;
      box-shadow: 0 2px 6px rgba(30, 41, 69, 0.2);
    }

    .cards-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      width: 100%;
      max-width: 620px;
    }

    @media (max-width: 440px) {
      .cards-grid {
        grid-template-columns: 1fr;
      }
    }

    .process-card {
      border-radius: 12px;
      padding: 14px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      position: relative;
      border: 1.5px solid #e2e8f0;
      background: #fafafa;
    }

    .thermal-card {
      border-color: #fed7aa;
      background: linear-gradient(180deg, #fff7ed 0%, #ffffff 100%);
    }

    .catalytic-card {
      border-color: #bae6fd;
      background: linear-gradient(180deg, #f0f9ff 0%, #ffffff 100%);
    }

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

    .header-icon {
      font-size: 22px;
      width: 36px;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 8px;
      background: #ffffff;
      box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    }

    .thermal-card .header-icon {
      border: 1px solid #fdba74;
    }

    .catalytic-card .header-icon {
      border: 1px solid #7dd3fc;
    }

    .card-title {
      font-size: 15px;
      font-weight: 700;
      color: #1e2945;
      line-height: 1.2;
    }

    .view-panel {
      display: flex;
      flex-direction: column;
      gap: 8px;
      min-height: 190px;
    }

    .info-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 6px 10px;
      border-radius: 6px;
      background: #ffffff;
      border: 1px solid #f1f5f9;
      font-size: 13px;
    }

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

    .info-val {
      font-weight: 700;
      color: #1e2945;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .tag {
      display: inline-block;
      padding: 2px 6px;
      border-radius: 4px;
      font-size: 11px;
      font-weight: 700;
    }

    .tag-orange {
      background: #ffedd5;
      color: #c2410c;
    }

    .tag-blue {
      background: #e0f2fe;
      color: #0369a1;
    }

    .product-box {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 10px;
      display: flex;
      flex-direction: column;
      gap: 8px;
      flex-grow: 1;
      justify-content: center;
    }

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

    .molecule-list {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
    }

    .mol-badge {
      background: #f8fafc;
      border: 1px solid #cbd5e1;
      border-radius: 6px;
      padding: 4px 8px;
      font-size: 12px;
      font-weight: 600;
      color: #334155;
    }

    .use-tag {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 12px;
      font-weight: 600;
      padding: 6px 8px;
      border-radius: 6px;
    }

    .use-orange {
      background: #fff7ed;
      color: #9a3412;
      border: 1px dashed #fdba74;
    }

    .use-blue {
      background: #f0f9ff;
      color: #075985;
      border: 1px dashed #7dd3fc;
    }

    .hidden {
      display: none !important;
    }
  </style>
</head>
<body>

  <div class="nav-toggle">
    <button class="toggle-btn active" id="btnCond" onclick="setView('cond')">⚙️ Operating Conditions</button>
    <button class="toggle-btn" id="btnProd" onclick="setView('prod')">🎯 Target Products</button>
  </div>

  <div class="cards-grid">
    
    
    <div class="process-card thermal-card">
      <div class="card-header">
        <div class="header-icon">🔥</div>
        <div>
          <div class="card-title">Thermal Cracking</div>
          <span class="tag tag-orange">Free Radical (•)</span>
        </div>
      </div>

      
      <div class="view-panel" id="thermalCond">
        <div class="info-row">
          <span class="info-label">Temperature</span>
          <span class="info-val">700 – 1000 °C</span>
        </div>
        <div class="info-row">
          <span class="info-label">Pressure</span>
          <span class="info-val">High (up to 70 atm)</span>
        </div>
        <div class="info-row">
          <span class="info-label">Catalyst</span>
          <span class="info-val">None</span>
        </div>
        <div class="info-row">
          <span class="info-label">Intermediate</span>
          <span class="info-val">Homolytic Fission</span>
        </div>
      </div>

      
      <div class="view-panel hidden" id="thermalProd">
        <div class="product-box">
          <div class="product-highlight">🌱 Short-Chain Alkenes</div>
          <div class="molecule-list">
            <span class="mol-badge">Ethene (C₂H₄)</span>
            <span class="mol-badge">Propene (C₃H₆)</span>
          </div>
          <div class="use-tag use-orange">
            🛍️ Feedstock for Plastics & Polymers
          </div>
        </div>
      </div>
    </div>

    
    <div class="process-card catalytic-card">
      <div class="card-header">
        <div class="header-icon">⬡</div>
        <div>
          <div class="card-title">Catalytic Cracking</div>
          <span class="tag tag-blue">Carbocation (C⁺)</span>
        </div>
      </div>

      
      <div class="view-panel" id="catalyticCond">
        <div class="info-row">
          <span class="info-label">Temperature</span>
          <span class="info-val">~450 – 500 °C</span>
        </div>
        <div class="info-row">
          <span class="info-label">Pressure</span>
          <span class="info-val">Slight (1 – 2 atm)</span>
        </div>
        <div class="info-row">
          <span class="info-label">Catalyst</span>
          <span class="info-val">Zeolite (Aluminosilicate)</span>
        </div>
        <div class="info-row">
          <span class="info-label">Intermediate</span>
          <span class="info-val">Heterolytic Fission</span>
        </div>
      </div>

      
      <div class="view-panel hidden" id="catalyticProd">
        <div class="product-box">
          <div class="product-highlight">⛽ Branched & Aromatic Chains</div>
          <div class="molecule-list">
            <span class="mol-badge">Iso-octane</span>
            <span class="mol-badge">Benzene rings</span>
          </div>
          <div class="use-tag use-blue">
            🚗 High-Octane Motor Fuels (Gasoline)
          </div>
        </div>
      </div>
    </div>

  </div>

  <script>
    function setView(view) {
      const btnCond = document.getElementById('btnCond');
      const btnProd = document.getElementById('btnProd');
      const thermalCond = document.getElementById('thermalCond');
      const thermalProd = document.getElementById('thermalProd');
      const catalyticCond = document.getElementById('catalyticCond');
      const catalyticProd = document.getElementById('catalyticProd');

      if (view === 'cond') {
        btnCond.classList.add('active');
        btnProd.classList.remove('active');
        thermalCond.classList.remove('hidden');
        thermalProd.classList.add('hidden');
        catalyticCond.classList.remove('hidden');
        catalyticProd.classList.add('hidden');
      } else {
        btnProd.classList.add('active');
        btnCond.classList.remove('active');
        thermalCond.classList.add('hidden');
        thermalProd.classList.remove('hidden');
        catalyticCond.classList.add('hidden');
        catalyticProd.classList.remove('hidden');
      }
    }
  </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: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
      padding: 10px 12px;
      gap: 8px;
    }

    /* Equation Header */
    .equation-bar {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      flex-wrap: wrap;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 6px 14px;
      font-size: 14px;
      font-weight: 700;
      width: 100%;
      max-width: 640px;
    }
    .eq-dec { color: #475569; }
    .eq-arr { color: #94a3b8; font-weight: 900; }
    .eq-oct { color: #0369a1; }
    .eq-eth { color: #0f766e; }

    /* Canvas Container */
    .canvas-box {
      width: 100%;
      max-width: 640px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 8px 4px;
      position: relative;
      overflow: hidden;
    }

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

    /* SVG Atom & Bond Styles */
    .atom-c { fill: #334155; }
    .atom-h { fill: #0284c7; }
    .atom-text {
      font-family: inherit;
      font-weight: 700;
      font-size: 11px;
      fill: #ffffff;
      text-anchor: middle;
      dominant-baseline: central;
      pointer-events: none;
      user-select: none;
    }
    .bond-line {
      stroke: #94a3b8;
      stroke-width: 3;
      stroke-linecap: round;
    }
    .double-bond {
      stroke: #0d9488;
      stroke-width: 3.5;
      stroke-linecap: round;
      opacity: 0;
      transition: opacity 0.4s ease;
    }
    .cleave-line {
      stroke: #ef4444;
      stroke-width: 2.5;
      stroke-dasharray: 4 3;
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    /* Groups and Animated Transitions */
    #groupOctane, #groupEthene, #hMigrate, #thermalZone, #badgeOctane, #badgeEthene {
      transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease;
    }

    /* Step States */
    .step-1 #groupOctane { transform: translateX(0); }
    .step-1 #groupEthene { transform: translateX(0); }
    .step-1 #cleaveBond { opacity: 1; }
    .step-1 #thermalZone { opacity: 0; }
    .step-1 #singleBondEth { opacity: 1; }
    .step-1 #doubleBondEth { opacity: 0; }
    .step-1 #badgeOctane, .step-1 #badgeEthene { opacity: 0; }
    .step-1 #hMigrate { transform: translate(0, 0); opacity: 1; }
    .step-1 #hMigrateBond { transform: translate(0, 0); opacity: 1; }
    .step-1 #c8NewBond { opacity: 0; }

    .step-2 #groupOctane { transform: translateX(0); }
    .step-2 #groupEthene { transform: translateX(0); }
    .step-2 #cleaveBond { opacity: 0; }
    .step-2 #cleaveCutLine { opacity: 1; animation: pulseCut 0.8s infinite alternate ease-in-out; }
    .step-2 #thermalZone { opacity: 1; }
    .step-2 #singleBondEth { opacity: 1; }
    .step-2 #doubleBondEth { opacity: 0; }
    .step-2 #badgeOctane, .step-2 #badgeEthene { opacity: 0; }
    .step-2 #hMigrate { transform: translate(-30px, 12px); }
    .step-2 #hMigrateBond { opacity: 0; }
    .step-2 #c8NewBond { opacity: 0.5; }

    .step-3 #groupOctane { transform: translateX(-24px); }
    .step-3 #groupEthene { transform: translateX(36px); }
    .step-3 #cleaveBond { opacity: 0; }
    .step-3 #cleaveCutLine { opacity: 0; }
    .step-3 #thermalZone { opacity: 0; }
    .step-3 #singleBondEth { opacity: 0; }
    .step-3 #doubleBondEth { opacity: 1; }
    .step-3 #badgeOctane, .step-3 #badgeEthene { opacity: 1; }
    .step-3 #hMigrate { transform: translate(-78px, 0px); opacity: 1; }
    .step-3 #hMigrateBond { opacity: 0; }
    .step-3 #c8NewBond { opacity: 1; }

    @keyframes pulseCut {
      0% { stroke: #ef4444; stroke-width: 2; }
      100% { stroke: #b91c1c; stroke-width: 4; }
    }

    /* Product Badges */
    .mol-badge {
      font-size: 10px;
      font-weight: 700;
      text-anchor: middle;
    }

    /* Conservation Summary Counters */
    .counters-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      width: 100%;
      max-width: 640px;
    }
    .count-card {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 6px 10px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 12px;
      font-weight: 600;
    }
    .tag-c { color: #334155; }
    .tag-h { color: #0284c7; }
    .check-badge {
      background: #dcfce7;
      color: #15803d;
      font-size: 11px;
      padding: 2px 6px;
      border-radius: 4px;
      font-weight: 700;
    }

    /* Navigation & Stepper Bar */
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      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 6px;
      width: 100%;
      max-width: 640px;
    }
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      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      color: #334155;
      padding: 6px 12px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 4px;
      transition: background 0.2s;
      user-select: none;
    }
    .btn-step:hover { background: #e2e8f0; }
    .step-pills {
      display: flex;
      gap: 4px;
    }
    .pill {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      padding: 5px 10px;
      border-radius: 6px;
      font-size: 12px;
      font-weight: 600;
      color: #475569;
      cursor: pointer;
      user-select: none;
      transition: all 0.2s ease;
    }
    .pill.active {
      background: #0284c7;
      border-color: #0284c7;
      color: #ffffff;
    }
    .btn-play {
      background: #f8fafc;
      border: 1px solid #cbd5e1;
      width: 32px;
      height: 32px;
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 12px;
      color: #334155;
    }
  </style>
</head>
<body class="step-1" id="root">

  
  <div class="equation-bar">
    <span class="eq-dec">C₁₀H₂₂ (Decane)</span>
    <span class="eq-arr">➔</span>
    <span class="eq-oct">C₈H₁₈ (Octane)</span>
    <span class="eq-arr">+</span>
    <span class="eq-eth">C₂H₄ (Ethene)</span>
  </div>

  
  <div class="canvas-box">
    <svg viewBox="0 0 620 180">
      <defs>
        <radialGradient id="heatGlow" cx="50%" cy="50%" r="50%">
          <stop offset="0%" stop-color="#ef4444" stop-opacity="0.45" />
          <stop offset="100%" stop-color="#ef4444" stop-opacity="0" />
        </radialGradient>
      </defs>

      
      <g id="thermalZone" opacity="0">
        <circle cx="395" cy="85" r="42" fill="url(#heatGlow)" />
        <text x="395" y="32" font-size="11" font-weight="700" fill="#b91c1c" text-anchor="middle">⚡ High Heat / Catalyst</text>
      </g>

      
      <line id="cleaveBond" x1="365" y1="85" x2="425" y2="85" class="bond-line" />
      <line id="cleaveCutLine" x1="395" y1="52" x2="395" y2="118" class="cleave-line" />

      
      <g id="groupOctane">
        
        <line x1="28" y1="85" x2="50" y2="85" class="bond-line" />
        <circle cx="20" cy="85" r="9" class="atom-h" />
        <text x="20" y="85" class="atom-text">H</text>

        
        <line id="c8NewBond" x1="365" y1="85" x2="387" y2="85" class="bond-line" opacity="0" />

        
        <line x1="50" y1="85" x2="95" y2="85" class="bond-line" />
        <line x1="95" y1="85" x2="140" y2="85" class="bond-line" />
        <line x1="140" y1="85" x2="185" y2="85" class="bond-line" />
        <line x1="185" y1="85" x2="230" y2="85" class="bond-line" />
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        <line x1="275" y1="85" x2="320" y2="85" class="bond-line" />
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        <line x1="50" y1="85" x2="50" y2="52" class="bond-line" /><circle cx="50" cy="45" r="9" class="atom-h" /><text x="50" y="45" class="atom-text">H</text>
        <line x1="50" y1="85" x2="50" y2="118" class="bond-line" /><circle cx="50" cy="125" r="9" class="atom-h" /><text x="50" y="125" class="atom-text">H</text>
        
        <line x1="95" y1="85" x2="95" y2="52" class="bond-line" /><circle cx="95" cy="45" r="9" class="atom-h" /><text x="95" y="45" class="atom-text">H</text>
        <line x1="95" y1="85" x2="95" y2="118" class="bond-line" /><circle cx="95" cy="125" r="9" class="atom-h" /><text x="95" y="125" class="atom-text">H</text>
        
        <line x1="140" y1="85" x2="140" y2="52" class="bond-line" /><circle cx="140" cy="45" r="9" class="atom-h" /><text x="140" y="45" class="atom-text">H</text>
        <line x1="140" y1="85" x2="140" y2="118" class="bond-line" /><circle cx="140" cy="125" r="9" class="atom-h" /><text x="140" y="125" class="atom-text">H</text>
        
        <line x1="185" y1="85" x2="185" y2="52" class="bond-line" /><circle cx="185" cy="45" r="9" class="atom-h" /><text x="185" y="45" class="atom-text">H</text>
        <line x1="185" y1="85" x2="185" y2="118" class="bond-line" /><circle cx="185" cy="125" r="9" class="atom-h" /><text x="185" y="125" class="atom-text">H</text>
        
        <line x1="230" y1="85" x2="230" y2="52" class="bond-line" /><circle cx="230" cy="45" r="9" class="atom-h" /><text x="230" y="45" class="atom-text">H</text>
        <line x1="230" y1="85" x2="230" y2="118" class="bond-line" /><circle cx="230" cy="125" r="9" class="atom-h" /><text x="230" y="125" class="atom-text">H</text>
        
        <line x1="275" y1="85" x2="275" y2="52" class="bond-line" /><circle cx="275" cy="45" r="9" class="atom-h" /><text x="275" y="45" class="atom-text">H</text>
        <line x1="275" y1="85" x2="275" y2="118" class="bond-line" /><circle cx="275" cy="125" r="9" class="atom-h" /><text x="275" y="125" class="atom-text">H</text>
        
        <line x1="320" y1="85" x2="320" y2="52" class="bond-line" /><circle cx="320" cy="45" r="9" class="atom-h" /><text x="320" y="45" class="atom-text">H</text>
        <line x1="320" y1="85" x2="320" y2="118" class="bond-line" /><circle cx="320" cy="125" r="9" class="atom-h" /><text x="320" y="125" class="atom-text">H</text>
        
        <line x1="365" y1="85" x2="365" y2="52" class="bond-line" /><circle cx="365" cy="45" r="9" class="atom-h" /><text x="365" y="45" class="atom-text">H</text>
        <line x1="365" y1="85" x2="365" y2="118" class="bond-line" /><circle cx="365" cy="125" r="9" class="atom-h" /><text x="365" y="125" class="atom-text">H</text>

        
        <circle cx="50" cy="85" r="13" class="atom-c" /><text x="50" y="85" class="atom-text">C</text>
        <circle cx="95" cy="85" r="13" class="atom-c" /><text x="95" y="85" class="atom-text">C</text>
        <circle cx="140" cy="85" r="13" class="atom-c" /><text x="140" y="85" class="atom-text">C</text>
        <circle cx="185" cy="85" r="13" class="atom-c" /><text x="185" y="85" class="atom-text">C</text>
        <circle cx="230" cy="85" r="13" class="atom-c" /><text x="230" y="85" class="atom-text">C</text>
        <circle cx="275" cy="85" r="13" class="atom-c" /><text x="275" y="85" class="atom-text">C</text>
        <circle cx="320" cy="85" r="13" class="atom-c" /><text x="320" y="85" class="atom-text">C</text>
        <circle cx="365" cy="85" r="13" class="atom-c" /><text x="365" y="85" class="atom-text">C</text>

        
        <g id="badgeOctane" opacity="0">
          <rect x="140" y="152" width="135" height="20" rx="10" fill="#e0f2fe" />
          <text x="207" y="166" class="mol-badge" fill="#0369a1">Octane: Fuel Alkane</text>
        </g>
      </g>

      
      <g id="groupEthene">
        
        <line id="singleBondEth" x1="425" y1="85" x2="480" y2="85" class="bond-line" />
        
        <g id="doubleBondEth" opacity="0">
          <line x1="425" y1="80" x2="480" y2="80" class="double-bond" style="opacity: 1;" />
          <line x1="425" y1="90" x2="480" y2="90" class="double-bond" style="opacity: 1;" />
        </g>

        
        <line x1="425" y1="85" x2="425" y2="52" class="bond-line" /><circle cx="425" cy="45" r="9" class="atom-h" /><text x="425" y="45" class="atom-text">H</text>
        
        
        <line id="hMigrateBond" x1="425" y1="85" x2="425" y2="118" class="bond-line" />

        
        <line x1="480" y1="85" x2="480" y2="52" class="bond-line" /><circle cx="480" cy="45" r="9" class="atom-h" /><text x="480" y="45" class="atom-text">H</text>
        <line x1="480" y1="85" x2="480" y2="118" class="bond-line" /><circle cx="480" cy="125" r="9" class="atom-h" /><text x="480" y="125" class="atom-text">H</text>

        
        <line x1="480" y1="85" x2="502" y2="85" class="bond-line" />
        <circle cx="510" cy="85" r="9" class="atom-h" />
        <text x="510" y="85" class="atom-text">H</text>

        
        <circle cx="425" cy="85" r="13" class="atom-c" /><text x="425" y="85" class="atom-text">C</text>
        <circle cx="480" cy="85" r="13" class="atom-c" /><text x="480" y="85" class="atom-text">C</text>

        
        <g id="badgeEthene" opacity="0">
          <rect x="405" y="152" width="130" height="20" rx="10" fill="#ccfbf1" />
          <text x="470" y="166" class="mol-badge" fill="#0f766e">Ethene: Monomer (C=C)</text>
        </g>
      </g>

      
      <g id="hMigrate">
        <circle cx="425" cy="125" r="9" class="atom-h" />
        <text x="425" y="125" class="atom-text">H</text>
      </g>
    </svg>
  </div>

  
  <div class="counters-grid">
    <div class="count-card">
      <span class="tag-c">Carbons: 10 C ➔ 8 + 2</span>
      <span class="check-badge">✓ Conserved</span>
    </div>
    <div class="count-card">
      <span class="tag-h">Hydrogens: 22 H ➔ 18 + 4</span>
      <span class="check-badge">✓ Conserved</span>
    </div>
  </div>

  
  <div class="controls-bar">
    <button class="btn-step" id="btnPrev">◀ Back</button>
    <div class="step-pills">
      <div class="pill active" id="pill0">1. Saturated Chain</div>
      <div class="pill" id="pill1">2. Bond Cleavage</div>
      <div class="pill" id="pill2">3. Products</div>
    </div>
    <button class="btn-step" id="btnNext">Next ▶</button>
    <button class="btn-play" id="btnPlay" title="Toggle Auto-Play">⏸</button>
  </div>

  <script>
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    const root = document.getElementById('root');
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    // Start auto loop
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</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Fractional Distillation of Crude Oil</title>
  <style>
    * { 
      box-sizing: border-box; 
      margin: 0; 
      padding: 0; 
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; 
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    body { 
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      color: #1e2945; 
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      display: flex; 
      flex-direction: column; 
      align-items: center; 
      justify-content: center; 
      min-height: 100vh;
      user-select: none; 
      -webkit-tap-highlight-color: transparent;
    }
    
    .diagram-root {
      width: 100%;
      max-width: 620px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    /* Top interactive property dashboard */
    .card-info {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 8px 12px;
      display: grid;
      grid-template-columns: 1.25fr 1fr 1.15fr;
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    .info-title {
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      color: #0f172a;
      display: flex;
      align-items: center;
      gap: 6px;
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    .info-title .badge {
      display: inline-block;
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: #0284c7;
      flex-shrink: 0;
      box-shadow: 0 0 0 2px rgba(2, 132, 199, 0.2);
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    .info-sub {
      font-size: 11px;
      color: #64748b;
      font-weight: 500;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      margin-top: 1px;
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    .info-stat {
      font-size: 11.5px;
      color: #334155;
      line-height: 1.25;
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    .info-stat strong {
      display: block;
      font-size: 9.5px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: #64748b;
      margin-bottom: 1px;
    }

    /* Main SVG illustration layout */
    .column-svg {
      width: 100%;
      height: auto;
      display: block;
      overflow: visible;
    }

    /* Interactive Tray Outlets */
    .tray-row {
      cursor: pointer;
      outline: none;
    }
    .tray-hit {
      transition: fill 0.15s ease, stroke 0.15s ease;
    }
    .tray-row:hover .tray-hit,
    .tray-row:focus-visible .tray-hit {
      fill: #f0f9ff;
      stroke: #38bdf8;
      stroke-width: 1.5;
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    .tray-row.active .tray-hit {
      fill: #e0f2fe;
      stroke: #0284c7;
      stroke-width: 1.5;
    }
    .tray-row:hover .pipe-arrow,
    .tray-row:focus-visible .pipe-arrow,
    .tray-row.active .pipe-arrow {
      stroke: #0284c7;
      stroke-width: 2.5;
    }
    .tray-row:hover text.fraction-name,
    .tray-row:focus-visible text.fraction-name,
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    }

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      display: flex;
      justify-content: space-between;
      gap: 6px;
    }
    .trend-pill {
      flex: 1;
      font-size: 10.5px;
      font-weight: 600;
      color: #475569;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      padding: 5px 8px;
      border-radius: 6px;
      display: flex;
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      justify-content: center;
      gap: 4px;
      text-align: center;
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    .trend-pill span {
      color: #0284c7;
      font-weight: 700;
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    @media (max-width: 480px) {
      body {
        padding: 4px;
      }
      .card-info {
        grid-template-columns: 1fr;
        gap: 5px;
        padding: 7px 10px;
      }
      .info-sub {
        white-space: normal;
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        flex-direction: column;
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      }
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        font-size: 10px;
        padding: 4px 6px;
        justify-content: flex-start;
        text-align: left;
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    }
  </style>
</head>
<body>

<div class="diagram-root">
  
  <div class="card-info" id="inspectorCard">
    <div>
      <div class="info-title">
        <span class="badge" id="badgeDot"></span>
        <span id="fracName">Refinery Gases</span>
      </div>
      <div class="info-sub" id="fracUse">Bottled gas, camping fuel, heating</div>
    </div>
    <div class="info-stat">
      <strong>Boiling & Chain Length</strong>
      <span id="fracChain">&lt;25°C • C₁–C₄</span>
    </div>
    <div class="info-stat">
      <strong>Physical Properties</strong>
      <span id="fracProp">Lowest boiling • Very runny • Highly volatile</span>
    </div>
  </div>

  
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    <text x="238" y="12" font-size="11" font-weight="700" fill="#64748b" letter-spacing="0.5">FRACTION / USE</text>
    <text x="395" y="12" font-size="11" font-weight="700" fill="#64748b" letter-spacing="0.5">BOILING PT</text>
    <text x="472" y="12" font-size="11" font-weight="700" fill="#64748b" letter-spacing="0.5">CHAIN</text>

    
    
    <text x="4" y="236" font-size="9.5" font-weight="700" fill="#475569">Crude In</text>
    <path d="M 0 275 L 8 275" fill="none" stroke="#475569" stroke-width="6" stroke-linecap="round"/>

    
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    <text x="36" y="299" font-size="10" font-weight="800" fill="#ffffff" text-anchor="middle">~380°C</text>

    
    <path d="M 64 275 L 125 275" fill="none" stroke="url(#feedPipeGrad)" stroke-width="7" stroke-linecap="square"/>
    
    <path d="M 115 271 L 122 275 L 115 279" fill="none" stroke="#ffffff" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>

    
    <line x1="96" y1="28" x2="96" y2="215" stroke="url(#tempBarGrad)" stroke-width="3" stroke-linecap="round"/>
    
    
    <circle cx="96" cy="28" r="3.5" fill="#0284c7"/>
    <text x="88" y="32" font-size="10" font-weight="700" fill="#0284c7" text-anchor="end">25°C (Cool)</text>

    
    <circle cx="96" cy="215" r="3.5" fill="#dc2626"/>
    <text x="88" y="219" font-size="10" font-weight="700" fill="#dc2626" text-anchor="end">350°C (Hot)</text>

    
    <text x="91" y="122" font-size="8" font-weight="700" fill="#94a3b8" text-anchor="middle" transform="rotate(-90 91 122)" letter-spacing="0.8">TEMP GRADIENT</text>

    
    
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    <rect x="127" y="20" width="66" height="296" rx="10" fill="url(#colTemp)"/>

    
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    <g class="tray-row active" data-index="0" id="tray0" tabindex="0" role="button" aria-label="Refinery Gases fraction">
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      <line x1="132" y1="42" x2="188" y2="42" stroke="#94a3b8" stroke-width="1.5"/>
      <path d="M 145 42 A 3 3 0 0 1 151 42 M 169 42 A 3 3 0 0 1 175 42" fill="none" stroke="#64748b" stroke-width="1.5"/>
      
      <path class="pipe-arrow" d="M 195 34 L 226 34" fill="none" stroke="#0284c7" stroke-width="2" stroke-linecap="round"/>
      <polygon points="225,30.5 231,34 225,37.5" fill="#0284c7"/>
      
      <text class="fraction-name" x="238" y="38" font-size="12.5" font-weight="600" fill="#1e2945">Refinery Gases</text>
      <text x="395" y="38" font-size="12" font-weight="600" fill="#475569">&lt;25°C</text>
      <text x="472" y="38" font-size="12" font-weight="700" fill="#0284c7">C₁–C₄</text>
    </g>

    
    <g class="tray-row" data-index="1" id="tray1" tabindex="0" role="button" aria-label="Gasoline and Petrol fraction">
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      <path d="M 145 84 A 3 3 0 0 1 151 84 M 169 84 A 3 3 0 0 1 175 84" fill="none" stroke="#64748b" stroke-width="1.5"/>
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      <text x="395" y="80" font-size="12" font-weight="600" fill="#475569">40–100°C</text>
      <text x="472" y="80" font-size="12" font-weight="700" fill="#0284c7">C₅–C₈</text>
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      <path d="M 145 126 A 3 3 0 0 1 151 126 M 169 126 A 3 3 0 0 1 175 126" fill="none" stroke="#64748b" stroke-width="1.5"/>
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      <text class="fraction-name" x="238" y="122" font-size="12.5" font-weight="600" fill="#1e2945">Naphtha (Chemicals)</text>
      <text x="395" y="122" font-size="12" font-weight="600" fill="#475569">110–180°C</text>
      <text x="472" y="122" font-size="12" font-weight="700" fill="#0284c7">C₉–C₁₀</text>
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    <g class="tray-row" data-index="3" id="tray3" tabindex="0" role="button" aria-label="Kerosene fraction">
      <rect class="tray-hit" x="120" y="144" width="395" height="32" rx="5" fill="transparent" stroke="transparent"/>
      <line x1="132" y1="168" x2="188" y2="168" stroke="#94a3b8" stroke-width="1.5"/>
      <path d="M 145 168 A 3 3 0 0 1 151 168 M 169 168 A 3 3 0 0 1 175 168" fill="none" stroke="#64748b" stroke-width="1.5"/>
      <path class="pipe-arrow" d="M 195 160 L 226 160" fill="none" stroke="#0284c7" stroke-width="2" stroke-linecap="round"/>
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      <text class="fraction-name" x="238" y="164" font-size="12.5" font-weight="600" fill="#1e2945">Kerosene (Jet Fuel)</text>
      <text x="395" y="164" font-size="12" font-weight="600" fill="#475569">180–260°C</text>
      <text x="472" y="164" font-size="12" font-weight="700" fill="#0284c7">C₁₁–C₁₅</text>
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    <g class="tray-row" data-index="4" id="tray4" tabindex="0" role="button" aria-label="Diesel fraction">
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      <line x1="132" y1="210" x2="188" y2="210" stroke="#94a3b8" stroke-width="1.5"/>
      <path d="M 145 210 A 3 3 0 0 1 151 210 M 169 210 A 3 3 0 0 1 175 210" fill="none" stroke="#64748b" stroke-width="1.5"/>
      <path class="pipe-arrow" d="M 195 202 L 226 202" fill="none" stroke="#0284c7" stroke-width="2" stroke-linecap="round"/>
      <polygon points="225,198.5 231,202 225,205.5" fill="#0284c7"/>
      <text class="fraction-name" x="238" y="206" font-size="12.5" font-weight="600" fill="#1e2945">Diesel (Car Fuel)</text>
      <text x="395" y="206" font-size="12" font-weight="600" fill="#475569">260–340°C</text>
      <text x="472" y="206" font-size="12" font-weight="700" fill="#0284c7">C₁₆–C₂₀</text>
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    <g class="tray-row" data-index="5" id="tray5" tabindex="0" role="button" aria-label="Fuel Oil fraction">
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      <line x1="132" y1="252" x2="188" y2="252" stroke="#94a3b8" stroke-width="1.5"/>
      <path d="M 145 252 A 3 3 0 0 1 151 252 M 169 252 A 3 3 0 0 1 175 252" fill="none" stroke="#64748b" stroke-width="1.5"/>
      <path class="pipe-arrow" d="M 195 244 L 226 244" fill="none" stroke="#0284c7" stroke-width="2" stroke-linecap="round"/>
      <polygon points="225,240.5 231,244 225,247.5" fill="#0284c7"/>
      <text class="fraction-name" x="238" y="248" font-size="12.5" font-weight="600" fill="#1e2945">Fuel Oil (Ships / Boilers)</text>
      <text x="395" y="248" font-size="12" font-weight="600" fill="#475569">340–400°C</text>
      <text x="472" y="248" font-size="12" font-weight="700" fill="#0284c7">C₂₀–C₅₀</text>
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    <g class="tray-row" data-index="6" id="tray6" tabindex="0" role="button" aria-label="Bitumen fraction">
      <rect class="tray-hit" x="120" y="272" width="395" height="34" rx="5" fill="transparent" stroke="transparent"/>
      
      <rect x="127" y="300" width="66" height="14" rx="2" fill="#0f172a"/>
      
      <path class="pipe-arrow" d="M 195 288 L 226 288" fill="none" stroke="#0f172a" stroke-width="2.5" stroke-linecap="round"/>
      <polygon points="225,284.5 231,288 225,291.5" fill="#0f172a"/>
      
      <text class="fraction-name" x="238" y="292" font-size="12.5" font-weight="600" fill="#1e2945">Bitumen (Roads / Asphalt)</text>
      <text x="395" y="292" font-size="12" font-weight="600" fill="#475569">&gt;400°C</text>
      <text x="472" y="292" font-size="12" font-weight="700" fill="#0284c7">C₅₀₊</text>
    </g>
  </svg>

  
  <div class="controls">
    <div class="trend-pill">
      <span>▲ Top of Column:</span> Low Boiling Pt • Small Molecules • Runny &amp; Volatile
    </div>
    <div class="trend-pill">
      <span>▼ Bottom of Column:</span> High Boiling Pt • Large Molecules • Viscous &amp; Thick
    </div>
  </div>
</div>

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      color: "#0284c7",
      use: "Bottled gas, camping fuel, heating, cooking",
      chain: "<25°C • C₁–C₄",
      prop: "Lowest boiling point • Very runny • Highly volatile & flammable"
    },
    {
      name: "Gasoline / Petrol",
      color: "#0284c7",
      use: "Fuel for petrol cars & light motor vehicles",
      chain: "40–100°C • C₅–C₈",
      prop: "Low viscosity • Highly volatile liquid • Ignites easily"
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      name: "Naphtha",
      color: "#0284c7",
      use: "Chemical feedstock for manufacturing plastics & drugs",
      chain: "110–180°C • C₉–C₁₀",
      prop: "Light hydrocarbon liquid • Thermal cracking feed"
    },
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      name: "Kerosene (Paraffin)",
      color: "#0284c7",
      use: "Aviation jet fuel & domestic heating paraffin",
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      use: "Fuel for diesel cars, trucks, buses & trains",
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      prop: "Higher viscosity • Higher energy density • Less volatile"
    },
    {
      name: "Fuel Oil",
      color: "#ea580c",
      use: "Fuel for cargo ships, power stations & industrial boilers",
      chain: "340–400°C • C₂₀–C₅₀",
      prop: "Thick & viscous liquid • High boiling point • Burns with smoky flame"
    },
    {
      name: "Bitumen (Residue)",
      color: "#0f172a",
      use: "Surfacing roads (asphalt) & waterproofing roofs",
      chain: ">400°C • C₅₀+",
      prop: "Solid/sludge at room temperature • Extremely viscous • Non-volatile"
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  const fracUse = document.getElementById('fracUse');
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</body>
</html>

OGS.11.PS.OR.3

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