<!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">
  <title>Key Organic Functional Groups</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      background: transparent;
      color: #0f172a;
      padding: 8px;
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100%;
    }

    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 10px;
      width: 100%;
      max-width: 680px;
    }

    @media (max-width: 440px) {
      .gallery-grid {
        grid-template-columns: 1fr;
        gap: 8px;
      }
    }

    .group-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 10px 12px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
      cursor: pointer;
      user-select: none;
    }

    .group-card:hover {
      transform: translateY(-2px);
    }

    /* Functional group accent hover glows */
    .group-card[data-type="alkene"]:hover {
      border-color: #ea580c;
      box-shadow: 0 4px 12px rgba(234, 88, 12, 0.12);
    }
    .group-card[data-type="alcohol"]:hover {
      border-color: #0891b2;
      box-shadow: 0 4px 12px rgba(8, 145, 178, 0.12);
    }
    .group-card[data-type="haloalkane"]:hover {
      border-color: #7c3aed;
      box-shadow: 0 4px 12px rgba(124, 58, 237, 0.12);
    }
    .group-card[data-type="aldehyde"]:hover {
      border-color: #059669;
      box-shadow: 0 4px 12px rgba(5, 150, 105, 0.12);
    }
    .group-card[data-type="ketone"]:hover {
      border-color: #d97706;
      box-shadow: 0 4px 12px rgba(217, 119, 6, 0.12);
    }
    .group-card[data-type="carboxylic"]:hover {
      border-color: #dc2626;
      box-shadow: 0 4px 12px rgba(220, 38, 38, 0.12);
    }

    .card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 4px;
    }

    .group-title {
      font-size: 14px;
      font-weight: 700;
      color: #0f172a;
    }

    .formula-badge {
      font-size: 11px;
      font-weight: 600;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      padding: 2px 6px;
      border-radius: 4px;
      background: #f1f5f9;
      color: #475569;
      border: 1px solid #e2e8f0;
    }

    .card-structure {
      width: 100%;
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 4px 0;
    }

    .card-structure svg {
      width: 100%;
      height: 100%;
      max-width: 220px;
    }

    .card-footer {
      display: flex;
      justify-content: flex-start;
      margin-top: 4px;
    }

    .imf-pill {
      font-size: 11px;
      font-weight: 500;
      padding: 2px 8px;
      border-radius: 12px;
      background: #f8fafc;
      color: #64748b;
      border: 1px solid #e2e8f0;
    }

    /* SVG Styling */
    .bond {
      stroke: #1e293b;
      stroke-width: 2.2;
      stroke-linecap: round;
    }

    .atom-text {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      font-size: 14px;
      font-weight: 700;
      dominant-baseline: central;
      text-anchor: middle;
    }

    .r-group { fill: #94a3b8; }
    .alkene-atom { fill: #ea580c; }
    .alcohol-atom { fill: #0891b2; }
    .haloalkane-atom { fill: #7c3aed; }
    .aldehyde-atom { fill: #059669; }
    .ketone-atom { fill: #d97706; }
    .carboxylic-atom { fill: #dc2626; }
    .lone-pair { fill: #0891b2; }
  </style>
</head>
<body>

  <div class="gallery-grid">
    
    <div class="group-card" data-type="alkene">
      <div class="card-header">
        <span class="group-title">Alkene</span>
        <span class="formula-badge">C=C</span>
      </div>
      <div class="card-structure">
        <svg viewBox="0 0 200 60" aria-hidden="true">
          
          <rect x="75" y="8" width="50" height="44" rx="8" fill="#ffedd5" stroke="#ea580c" stroke-width="1.5"/>
          
          <text x="32" y="30" class="atom-text r-group">R</text>
          <line x1="45" y1="30" x2="80" y2="30" class="bond" />
          <text x="168" y="30" class="atom-text r-group">R'</text>
          <line x1="120" y1="30" x2="155" y2="30" class="bond" />
          
          <text x="86" y="30" class="atom-text alkene-atom">C</text>
          <line x1="94" y1="26" x2="106" y2="26" stroke="#ea580c" stroke-width="2.2" stroke-linecap="round" />
          <line x1="94" y1="34" x2="106" y2="34" stroke="#ea580c" stroke-width="2.2" stroke-linecap="round" />
          <text x="114" y="30" class="atom-text alkene-atom">C</text>
        </svg>
      </div>
      <div class="card-footer">
        <span class="imf-pill">London dispersion only</span>
      </div>
    </div>

    
    <div class="group-card" data-type="alcohol">
      <div class="card-header">
        <span class="group-title">Alcohol</span>
        <span class="formula-badge">—OH</span>
      </div>
      <div class="card-structure">
        <svg viewBox="0 0 200 60" aria-hidden="true">
          
          <rect x="92" y="8" width="76" height="44" rx="8" fill="#cffafe" stroke="#0891b2" stroke-width="1.5"/>
          
          <text x="45" y="30" class="atom-text r-group">R</text>
          <line x1="60" y1="30" x2="100" y2="30" class="bond" />
          
          <text x="110" y="30" class="atom-text alcohol-atom">O</text>
          
          <circle cx="106" cy="18" r="1.5" class="lone-pair" />
          <circle cx="114" cy="18" r="1.5" class="lone-pair" />
          <circle cx="106" cy="42" r="1.5" class="lone-pair" />
          <circle cx="114" cy="42" r="1.5" class="lone-pair" />
          <line x1="120" y1="30" x2="142" y2="30" stroke="#0891b2" stroke-width="2.2" stroke-linecap="round" />
          <text x="154" y="30" class="atom-text alcohol-atom">H</text>
        </svg>
      </div>
      <div class="card-footer">
        <span class="imf-pill">Strong H-Bonding</span>
      </div>
    </div>

    
    <div class="group-card" data-type="haloalkane">
      <div class="card-header">
        <span class="group-title">Haloalkane</span>
        <span class="formula-badge">—X</span>
      </div>
      <div class="card-structure">
        <svg viewBox="0 0 200 60" aria-hidden="true">
          
          <rect x="110" y="8" width="52" height="44" rx="8" fill="#ede9fe" stroke="#7c3aed" stroke-width="1.5"/>
          
          <text x="50" y="30" class="atom-text r-group">R</text>
          <line x1="65" y1="30" x2="120" y2="30" class="bond" />
          
          <text x="136" y="30" class="atom-text haloalkane-atom">X</text>
        </svg>
      </div>
      <div class="card-footer">
        <span class="imf-pill">Dipole-Dipole (Polar)</span>
      </div>
    </div>

    
    <div class="group-card" data-type="aldehyde">
      <div class="card-header">
        <span class="group-title">Aldehyde</span>
        <span class="formula-badge">—CHO</span>
      </div>
      <div class="card-structure">
        <svg viewBox="0 0 200 60" aria-hidden="true">
          
          <rect x="85" y="4" width="80" height="52" rx="8" fill="#d1fae5" stroke="#059669" stroke-width="1.5"/>
          
          <text x="40" y="36" class="atom-text r-group">R</text>
          <line x1="55" y1="36" x2="100" y2="36" class="bond" />
          
          <text x="110" y="36" class="atom-text aldehyde-atom">C</text>
          
          <line x1="107" y1="26" x2="107" y2="16" stroke="#059669" stroke-width="2" stroke-linecap="round" />
          <line x1="113" y1="26" x2="113" y2="16" stroke="#059669" stroke-width="2" stroke-linecap="round" />
          <text x="110" y="11" class="atom-text aldehyde-atom" style="font-size: 12px;">O</text>
          
          <line x1="120" y1="36" x2="144" y2="36" stroke="#059669" stroke-width="2.2" stroke-linecap="round" />
          <text x="154" y="36" class="atom-text aldehyde-atom">H</text>
        </svg>
      </div>
      <div class="card-footer">
        <span class="imf-pill">Dipole-Dipole (Polar)</span>
      </div>
    </div>

    
    <div class="group-card" data-type="ketone">
      <div class="card-header">
        <span class="group-title">Ketone</span>
        <span class="formula-badge">—CO—</span>
      </div>
      <div class="card-structure">
        <svg viewBox="0 0 200 60" aria-hidden="true">
          
          <rect x="80" y="4" width="40" height="52" rx="8" fill="#fef3c7" stroke="#d97706" stroke-width="1.5"/>
          
          <text x="40" y="36" class="atom-text r-group">R</text>
          <line x1="55" y1="36" x2="90" y2="36" class="bond" />
          <text x="160" y="36" class="atom-text r-group">R'</text>
          <line x1="110" y1="36" x2="145" y2="36" class="bond" />
          
          <text x="100" y="36" class="atom-text ketone-atom">C</text>
          
          <line x1="97" y1="26" x2="97" y2="16" stroke="#d97706" stroke-width="2" stroke-linecap="round" />
          <line x1="103" y1="26" x2="103" y2="16" stroke="#d97706" stroke-width="2" stroke-linecap="round" />
          <text x="100" y="11" class="atom-text ketone-atom" style="font-size: 12px;">O</text>
        </svg>
      </div>
      <div class="card-footer">
        <span class="imf-pill">Dipole-Dipole (Polar)</span>
      </div>
    </div>

    
    <div class="group-card" data-type="carboxylic">
      <div class="card-header">
        <span class="group-title">Carboxylic Acid</span>
        <span class="formula-badge">—COOH</span>
      </div>
      <div class="card-structure">
        <svg viewBox="0 0 200 60" aria-hidden="true">
          
          <rect x="75" y="4" width="95" height="52" rx="8" fill="#fee2e2" stroke="#dc2626" stroke-width="1.5"/>
          
          <text x="35" y="36" class="atom-text r-group">R</text>
          <line x1="50" y1="36" x2="85" y2="36" class="bond" />
          
          <text x="95" y="36" class="atom-text carboxylic-atom">C</text>
          
          <line x1="92" y1="26" x2="92" y2="16" stroke="#dc2626" stroke-width="2" stroke-linecap="round" />
          <line x1="98" y1="26" x2="98" y2="16" stroke="#dc2626" stroke-width="2" stroke-linecap="round" />
          <text x="95" y="11" class="atom-text carboxylic-atom" style="font-size: 12px;">O</text>
          
          <line x1="105" y1="36" x2="120" y2="36" stroke="#dc2626" stroke-width="2.2" stroke-linecap="round" />
          <text x="130" y="36" class="atom-text carboxylic-atom">O</text>
          <line x1="138" y1="36" x2="150" y2="36" stroke="#dc2626" stroke-width="2.2" stroke-linecap="round" />
          <text x="158" y="36" class="atom-text carboxylic-atom">H</text>
        </svg>
      </div>
      <div class="card-footer">
        <span class="imf-pill">Very Strong H-Bonding</span>
      </div>
    </div>
  </div>

</body>
</html>

Organic Chemistry: Functional Groups and Homologous Series

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Hierarchy of Intermolecular Forces</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: transparent;
      color: #1e293b;
      padding: 10px 6px;
      width: 100%;
      user-select: none;
      -webkit-tap-highlight-color: transparent;
    }

    .main-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      width: 100%;
      max-width: 760px;
      margin: 0 auto;
    }

    .imf-col {
      display: flex;
      flex-direction: column;
      align-items: center;
      background: transparent;
      border: none;
      border-radius: 0;
      box-shadow: none;
      padding: 4px 2px;
      cursor: pointer;
      position: relative;
      transition: opacity 0.25s ease;
    }

    .imf-col:focus-visible {
      outline: 2px solid #0284c7;
      outline-offset: 4px;
      border-radius: 6px;
    }

    .header-area {
      display: flex;
      flex-direction: column;
      align-items: center;
      width: 100%;
      text-align: center;
    }

    .badge {
      font-size: 10px;
      font-weight: 700;
      letter-spacing: 0.04em;
      padding: 3px 9px;
      border-radius: 999px;
      margin-bottom: 5px;
      text-transform: uppercase;
      text-align: center;
      white-space: nowrap;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .col-ldf .badge { background: #e0f2fe; color: #0369a1; }
    .col-dip .badge { background: #fef3c7; color: #b45309; }
    .col-hbd .badge { background: #ede9fe; color: #6d28d9; }

    .col-title {
      font-size: 13.5px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 3px;
      text-align: center;
      line-height: 1.25;
    }

    .sub-note {
      font-size: 10px;
      color: #64748b;
      text-align: center;
      margin-bottom: 6px;
      line-height: 1.3;
      min-height: 26px;
      padding: 0 4px;
    }

    .svg-container {
      width: 100%;
      max-width: 210px;
      aspect-ratio: 1.15 / 1;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 2px 0 6px;
    }

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

    .energy-gauge {
      width: 100%;
      padding: 0 4px;
      margin-top: auto;
    }

    .bar-track {
      height: 7px;
      width: 100%;
      background: #e2e8f0;
      border-radius: 4px;
      overflow: hidden;
      margin-bottom: 4px;
    }

    .bar-fill {
      height: 100%;
      border-radius: 4px;
    }

    .fill-ldf { width: 15%; background: #0284c7; }
    .fill-dip { width: 50%; background: #d97706; }
    .fill-hbd { width: 95%; background: #7c3aed; }

    .energy-label {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 10.5px;
      font-weight: 600;
      color: #64748b;
    }

    .energy-val {
      font-weight: 700;
    }

    .col-ldf .energy-val { color: #0284c7; }
    .col-dip .energy-val { color: #d97706; }
    .col-hbd .energy-val { color: #7c3aed; }

    /* SVG typography & chemical styling */
    .delta-neg { fill: #dc2626; font-weight: 800; font-size: 12px; }
    .delta-pos { fill: #0284c7; font-weight: 800; font-size: 12px; }
    .atom-lbl { font-size: 12px; font-weight: bold; font-family: system-ui, sans-serif; text-anchor: middle; dominant-baseline: central; }
    .force-lbl { font-size: 8.5px; font-weight: 700; text-anchor: middle; dominant-baseline: central; }

    /* Smooth animations without rapid flickering */
    @keyframes pulse-dash {
      0% { stroke-dashoffset: 24; }
      100% { stroke-dashoffset: 0; }
    }

    .force-line {
      stroke-dasharray: 5, 4;
      animation: pulse-dash 3s linear infinite;
    }

    @keyframes cloud-shift {
      0%, 100% { transform: translateX(0); opacity: 0.25; }
      50% { transform: translateX(6px); opacity: 0.4; }
    }

    .cloud-anim {
      animation: cloud-shift 3s ease-in-out infinite;
    }

    /* Uniform Mobile Responsive Layout */
    @media (max-width: 560px) {
      .main-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        max-width: 340px;
      }

      .imf-col {
        padding: 0 4px 12px;
        border-bottom: 1px solid rgba(226, 232, 240, 0.6);
      }

      .imf-col:last-child {
        border-bottom: none;
      }

      .sub-note {
        min-height: auto;
        margin-bottom: 8px;
      }

      .svg-container {
        max-width: 220px;
        aspect-ratio: 1.25 / 1;
      }
    }
  </style>
</head>
<body>

  <div class="main-grid" role="region" aria-label="Intermolecular Forces Comparison">
    
    
    <div class="imf-col col-ldf" onclick="selectCol(this)" tabindex="0" role="button" aria-label="London Dispersion Forces Details">
      <div class="header-area">
        <span class="badge">Weak · ~1–10 kJ/mol</span>
        <div class="col-title">London Dispersion</div>
        <div class="sub-note">Temporary induced dipoles in nonpolar molecules (e.g., pentane)</div>
      </div>
      
      <div class="svg-container">
        <svg viewBox="0 0 170 140" aria-label="London Dispersion Force Diagram">
          <defs>
            <radialGradient id="cloudGrad" cx="50%" cy="50%" r="50%">
              <stop offset="0%" stop-color="#0284c7" stop-opacity="0.65"/>
              <stop offset="100%" stop-color="#0284c7" stop-opacity="0"/>
            </radialGradient>
          </defs>

          
          <g transform="translate(15, 14)">
            <ellipse class="cloud-anim" cx="70" cy="11" rx="58" ry="14" fill="url(#cloudGrad)"/>
            <path d="M 16,18 L 42,6 L 70,18 L 98,6 L 124,18" fill="none" stroke="#64748b" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
            <text x="5" y="10" class="delta-pos">δ⁺</text>
            <text x="127" y="24" class="delta-neg">δ⁻</text>
          </g>

          
          <g>
            <line x1="82" y1="38" x2="82" y2="92" stroke="#0284c7" stroke-width="2" class="force-line"/>
            <line x1="122" y1="38" x2="122" y2="92" stroke="#0284c7" stroke-width="2" class="force-line"/>
            <rect x="12" y="58" width="146" height="18" rx="5" fill="#f0f9ff" stroke="#bae6fd" stroke-width="1" />
            <text x="85" y="67" class="force-lbl" fill="#0369a1">Temporary induced dipole</text>
          </g>

          
          <g transform="translate(15, 92)">
            <ellipse class="cloud-anim" cx="70" cy="11" rx="58" ry="14" fill="url(#cloudGrad)" style="animation-delay: -1.5s;"/>
            <path d="M 16,18 L 42,6 L 70,18 L 98,6 L 124,18" fill="none" stroke="#64748b" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
            <text x="5" y="24" class="delta-neg">δ⁻</text>
            <text x="127" y="10" class="delta-pos">δ⁺</text>
          </g>
        </svg>
      </div>

      <div class="energy-gauge">
        <div class="bar-track">
          <div class="bar-fill fill-ldf"></div>
        </div>
        <div class="energy-label">
          <span>Relative Strength</span>
          <span class="energy-val">1–10 kJ/mol</span>
        </div>
      </div>
    </div>

    
    <div class="imf-col col-dip" onclick="selectCol(this)" tabindex="0" role="button" aria-label="Dipole-Dipole Forces Details">
      <div class="header-area">
        <span class="badge">Medium · ~5–25 kJ/mol</span>
        <div class="col-title">Dipole–Dipole</div>
        <div class="sub-note">Permanent dipole attraction in polar molecules (e.g., acetone)</div>
      </div>

      <div class="svg-container">
        <svg viewBox="0 0 170 140" aria-label="Dipole-Dipole Force Diagram">
          
          <g transform="translate(12, 10)">
            <path d="M 10,32 L 32,18 L 54,32" fill="none" stroke="#64748b" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
            <line x1="29.5" y1="18" x2="29.5" y2="1" stroke="#64748b" stroke-width="2"/>
            <line x1="34.5" y1="18" x2="34.5" y2="1" stroke="#64748b" stroke-width="2"/>
            
            <circle cx="32" cy="18" r="3" fill="#64748b"/>
            <text x="43" y="21" class="delta-pos">δ⁺</text>
            
            <circle cx="32" cy="-1" r="7" fill="#fee2e2" stroke="#fca5a5" stroke-width="1"/>
            <text x="32" y="-1" class="atom-lbl" fill="#dc2626">O</text>
            <text x="44" y="-1" class="delta-neg">δ⁻</text>
          </g>

          
          <g>
            <line x1="46" y1="16" x2="114" y2="108" stroke="#d97706" stroke-width="2.2" class="force-line"/>
            <rect x="8" y="58" width="154" height="18" rx="5" fill="#fffbeb" stroke="#fde68a" stroke-width="1" />
            <text x="85" y="67" class="force-lbl" fill="#b45309">Permanent dipole attraction</text>
          </g>

          
          <g transform="translate(86, 88)">
            <line x1="30" y1="18" x2="30" y2="35" stroke="#64748b" stroke-width="2"/>
            <line x1="35" y1="18" x2="35" y2="35" stroke="#64748b" stroke-width="2"/>
            <path d="M 12,5 L 32,18 L 54,5" fill="none" stroke="#64748b" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
            
            <circle cx="32" cy="18" r="3" fill="#64748b"/>
            <text x="43" y="19" class="delta-pos">δ⁺</text>
            
            <circle cx="32" cy="38" r="7" fill="#fee2e2" stroke="#fca5a5" stroke-width="1"/>
            <text x="32" y="38" class="atom-lbl" fill="#dc2626">O</text>
            <text x="44" y="39" class="delta-neg">δ⁻</text>
          </g>
        </svg>
      </div>

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          <span>Relative Strength</span>
          <span class="energy-val">5–25 kJ/mol</span>
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        <span class="badge">Strong · ~10–40 kJ/mol</span>
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        <div class="bar-track">
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          <span>Relative Strength</span>
          <span class="energy-val">10–40 kJ/mol</span>
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<head>
  <meta charset="UTF-8">
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  <title>C5H12 Isomers: Branching and Intermolecular Forces</title>
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<body>

  <div class="header-banner">
    <h1>Effect of Molecular Shape on London Dispersion Forces (C₅H₁₂)</h1>
    <p>Straight chains allow closer contact; branching creates compact spherical shapes with less surface contact</p>
  </div>

  <div class="grid">
    
    <div class="isomer-card">
      <div class="card-header">
        <div class="title-group">
          <span class="title">Pentane</span>
          <span class="subtitle">Straight-chain isomer (5 Carbons)</span>
        </div>
        <span class="bp-tag bp-high">bp 36.1°C</span>
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      <div class="callout-box pentane-box">
        <strong>✓ Larger surface contact area</strong>
        Molecules interlock more completely &rarr; stronger London dispersion forces &rarr; requires more thermal energy to vaporize (bp 36.1°C).
      </div>
    </div>

    
    <div class="isomer-card">
      <div class="card-header">
        <div class="title-group">
          <span class="title">2,2-Dimethylpropane</span>
          <span class="subtitle">Neopentane (Branched, 5 Carbons)</span>
        </div>
        <span class="bp-tag bp-low">bp 9.5°C</span>
      </div>

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        <strong>✗ Minimal surface contact area</strong>
        Compact spherical shape touches at small tangent &rarr; weaker dispersion forces &rarr; boils at a much lower temp (bp 9.5°C).
      </div>
    </div>
  </div>

  
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        grid-column: 1 / 2;
        grid-row: 1 / 2;
      }
      .bp-col {
        grid-column: 2 / 3;
        grid-row: 1 / 2;
        min-width: 60px;
      }
      .structure-box {
        grid-column: 1 / 3;
        grid-row: 2 / 2;
        padding-top: 5px;
        border-top: 1px dashed #e2e8f0;
        justify-content: space-between;
        gap: 6px;
      }
      .mol-name { font-size: 13px; }
      .mol-mw { font-size: 10.5px; }
      .badge { font-size: 10px; padding: 2px 6px; }
      .bp-temp { font-size: 13px; }
      .bp-bar-wrap { width: 50px; }
      .chem-svg { height: 26px; max-width: 90px; }
      .axis-legend { font-size: 10px; }
    }
  </style>
</head>
<body>

  <div class="header-bar">
    <div class="title-label">
      <span>▲ Boiling Point vs IMF</span>
    </div>
    <div class="controls">
      <button class="btn-ctrl" id="playBtn" type="button">⏸ Pause</button>
    </div>
  </div>

  <div class="ladder" id="ladder">
    
    <div class="rung active" data-step="0">
      <div class="rung-main">
        <div class="step-num">1</div>
        <div class="mol-info">
          <span class="mol-name">Butane</span>
          <span class="mol-mw">MW 58 g/mol</span>
        </div>
      </div>
      <div class="structure-box">
        <svg class="chem-svg" viewBox="0 0 105 32" fill="none" stroke="#1e2945" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
          <polyline points="8,22 34,10 62,22 90,10" />
          <circle cx="8" cy="22" r="2.5" fill="#1e2945" stroke="none" />
          <circle cx="34" cy="10" r="2.5" fill="#1e2945" stroke="none" />
          <circle cx="62" cy="22" r="2.5" fill="#1e2945" stroke="none" />
          <circle cx="90" cy="10" r="2.5" fill="#1e2945" stroke="none" />
        </svg>
        <span class="badge badge-dispersion">London Dispersion</span>
      </div>
      <div class="bp-col">
        <span class="bp-temp t1">-0.5°C</span>
        <div class="bp-bar-wrap">
          <div class="bp-bar-fill bg-t1" style="width: 12%;"></div>
        </div>
      </div>
    </div>

    
    <div class="rung" data-step="1">
      <div class="rung-main">
        <div class="step-num">2</div>
        <div class="mol-info">
          <span class="mol-name">Propanal</span>
          <span class="mol-mw">MW 58 g/mol</span>
        </div>
      </div>
      <div class="structure-box">
        <svg class="chem-svg" viewBox="0 0 105 34" fill="none" stroke="#1e2945" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
          <polyline points="8,24 34,11 60,24" />
          <line x1="58" y1="24" x2="58" y2="8" stroke="#d97706" />
          <line x1="62" y1="24" x2="62" y2="8" stroke="#d97706" />
          <text x="60" y="7" font-size="9" font-weight="700" fill="#d97706" stroke="none" text-anchor="middle">O</text>
          <line x1="60" y1="24" x2="82" y2="24" />
          <text x="88" y="27" font-size="9" font-weight="700" fill="#64748b" stroke="none">H</text>
        </svg>
        <span class="badge badge-dipole">Dipole–Dipole (C=O)</span>
      </div>
      <div class="bp-col">
        <span class="bp-temp t2">48°C</span>
        <div class="bp-bar-wrap">
          <div class="bp-bar-fill bg-t2" style="width: 45%;"></div>
        </div>
      </div>
    </div>

    
    <div class="rung" data-step="2">
      <div class="rung-main">
        <div class="step-num">3</div>
        <div class="mol-info">
          <span class="mol-name">Propan-1-ol</span>
          <span class="mol-mw">MW 60 g/mol</span>
        </div>
      </div>
      <div class="structure-box">
        <svg class="chem-svg" viewBox="0 0 105 32" fill="none" stroke="#1e2945" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
          <polyline points="8,22 34,10 60,22 78,11" />
          <text x="83" y="14" font-size="10" font-weight="700" fill="#0284c7" stroke="none">OH</text>
        </svg>
        <span class="badge badge-hbond">H-Bonding (–OH)</span>
      </div>
      <div class="bp-col">
        <span class="bp-temp t3">97°C</span>
        <div class="bp-bar-wrap">
          <div class="bp-bar-fill bg-t3" style="width: 78%;"></div>
        </div>
      </div>
    </div>

    
    <div class="rung" data-step="3">
      <div class="rung-main">
        <div class="step-num">4</div>
        <div class="mol-info">
          <span class="mol-name">Ethanoic Acid</span>
          <span class="mol-mw">MW 60 g/mol</span>
        </div>
      </div>
      <div class="structure-box">
        <svg class="chem-svg" viewBox="0 0 105 34" fill="none" stroke="#1e2945" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
          <line x1="10" y1="23" x2="36" y2="23" />
          <line x1="34" y1="23" x2="34" y2="8" stroke="#9333ea" />
          <line x1="38" y1="23" x2="38" y2="8" stroke="#9333ea" />
          <text x="36" y="7" font-size="9" font-weight="700" fill="#9333ea" stroke="none" text-anchor="middle">O</text>
          <line x1="36" y1="23" x2="56" y2="23" stroke="#9333ea" />
          <text x="62" y="26" font-size="10" font-weight="700" fill="#9333ea" stroke="none">OH</text>
        </svg>
        <span class="badge badge-dimer">2× H-Bond Dimer</span>
      </div>
      <div class="bp-col">
        <span class="bp-temp t4">118°C</span>
        <div class="bp-bar-wrap">
          <div class="bp-bar-fill bg-t4" style="width: 95%;"></div>
        </div>
      </div>
    </div>
  </div>

  <div class="axis-legend">
    <span>Similar mass (~58–60 g/mol)</span>
    <span class="axis-arrow">Stronger IMF → Higher Boiling Point ▲</span>
  </div>

  <script>
    const rungs = document.querySelectorAll('.rung');
    const playBtn = document.getElementById('playBtn');
    let currentIdx = 0;
    let timer = null;
    let isPlaying = true;

    function setActive(index) {
      rungs.forEach((r, i) => {
        if (i === index) {
          r.classList.add('active');
        } else {
          r.classList.remove('active');
        }
      });
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    }

    function nextStep() {
      const next = (currentIdx + 1) % rungs.length;
      setActive(next);
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      timer = setInterval(nextStep, 3000);
      isPlaying = true;
      playBtn.textContent = '⏸ Pause';
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        clearInterval(timer);
        timer = null;
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      isPlaying = false;
      playBtn.textContent = '▶ Play';
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      rung.addEventListener('click', () => {
        setActive(index);
        stopTimer();
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    playBtn.addEventListener('click', () => {
      if (isPlaying) {
        stopTimer();
      } else {
        nextStep();
        startTimer();
      }
    });

    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">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #f8fafc;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
      padding: 16px 12px;
      user-select: none;
    }

    .beakers-row {
      display: flex;
      justify-content: center;
      align-items: flex-end;
      gap: 20px;
      width: 100%;
      max-width: 520px;
      flex: 1;
      padding-top: 8px;
    }

    .beaker-card {
      flex: 1;
      max-width: 220px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      transition: opacity 0.3s ease;
    }

    .title-tag {
      font-size: 14px;
      font-weight: 700;
      color: #0f172a;
      text-align: center;
      line-height: 1.2;
    }

    .formula-tag {
      font-size: 13px;
      font-weight: 600;
      color: #64748b;
      margin-top: -4px;
    }

    .beaker-svg {
      width: 100%;
      height: auto;
      max-height: 200px;
      filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.05));
    }

    .phase-label {
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.02em;
    }

    /* Spectrum Bar */
    .spectrum-container {
      width: 100%;
      max-width: 520px;
      margin-top: 12px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .spectrum-bar {
      display: flex;
      width: 100%;
      height: 38px;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    }

    .spectrum-segment {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      font-weight: 700;
      text-align: center;
      padding: 2px 4px;
      line-height: 1.15;
      cursor: pointer;
      transition: filter 0.2s ease, opacity 0.2s ease;
    }

    .seg-miscible {
      background: #0ea5e9;
      color: #ffffff;
      flex: 1.1;
    }

    .seg-partial {
      background: #f59e0b;
      color: #ffffff;
      flex: 0.9;
    }

    .seg-insoluble {
      background: #ef4444;
      color: #ffffff;
      flex: 1.2;
    }

    .spectrum-segment:hover {
      filter: brightness(1.08);
    }

    .dimmed {
      opacity: 0.45;
    }
  </style>
</head>
<body>

  
  <div class="beakers-row">
    
    <div class="beaker-card" id="cardMethanol">
      <div class="title-tag">Methanol</div>
      <div class="formula-tag">CH₃OH + H₂O</div>
      <svg class="beaker-svg" viewBox="0 0 160 190">
        
        <rect x="25" y="25" width="110" height="150" rx="8" fill="none" stroke="#94a3b8" stroke-width="4" />
        <path d="M 20 25 L 30 25 M 130 25 L 140 25" stroke="#94a3b8" stroke-width="4" stroke-linecap="round" />
        
        
        <line x1="25" y1="60" x2="42" y2="60" stroke="#cbd5e1" stroke-width="2" />
        <line x1="25" y1="90" x2="50" y2="90" stroke="#cbd5e1" stroke-width="2" />
        <line x1="25" y1="120" x2="42" y2="120" stroke="#cbd5e1" stroke-width="2" />
        <line x1="25" y1="150" x2="50" y2="150" stroke="#cbd5e1" stroke-width="2" />

        
        <rect x="27" y="55" width="106" height="118" rx="6" fill="#38bdf8" fill-opacity="0.55" />
        
        
        <g fill="#0284c7" opacity="0.85">
          <circle cx="50" cy="80" r="4" />
          <circle cx="80" cy="70" r="4" />
          <circle cx="110" cy="85" r="4" />
          <circle cx="65" cy="110" r="4" />
          <circle cx="95" cy="115" r="4" />
          <circle cx="45" cy="140" r="4" />
          <circle cx="80" cy="150" r="4" />
          <circle cx="115" cy="142" r="4" />
        </g>
        
        
        <rect x="36" y="100" width="88" height="24" rx="12" fill="#ffffff" filter="drop-shadow(0 2px 4px rgba(0,0,0,0.1))" />
        <text x="80" y="116" text-anchor="middle" fill="#0284c7" font-size="11" font-weight="800">1 LAYER</text>
      </svg>
      <div class="phase-label" style="color: #0284c7;">Miscible</div>
    </div>

    
    <div class="beaker-card" id="cardOctanol">
      <div class="title-tag">Octan-1-ol</div>
      <div class="formula-tag">C₈H₁₇OH + H₂O</div>
      <svg class="beaker-svg" viewBox="0 0 160 190">
        
        <rect x="25" y="25" width="110" height="150" rx="8" fill="none" stroke="#94a3b8" stroke-width="4" />
        <path d="M 20 25 L 30 25 M 130 25 L 140 25" stroke="#94a3b8" stroke-width="4" stroke-linecap="round" />

        
        <line x1="25" y1="60" x2="42" y2="60" stroke="#cbd5e1" stroke-width="2" />
        <line x1="25" y1="90" x2="50" y2="90" stroke="#cbd5e1" stroke-width="2" />
        <line x1="25" y1="120" x2="42" y2="120" stroke="#cbd5e1" stroke-width="2" />
        <line x1="25" y1="150" x2="50" y2="150" stroke="#cbd5e1" stroke-width="2" />

        
        <rect x="27" y="100" width="106" height="73" rx="6" fill="#38bdf8" fill-opacity="0.55" />
        
        
        <rect x="27" y="55" width="106" height="45" fill="#f87171" fill-opacity="0.75" />
        
        
        <line x1="27" y1="100" x2="133" y2="100" stroke="#b91c1c" stroke-width="2" stroke-dasharray="3 2" />

        
        <rect x="36" y="118" width="88" height="24" rx="12" fill="#ffffff" filter="drop-shadow(0 2px 4px rgba(0,0,0,0.1))" />
        <text x="80" y="134" text-anchor="middle" fill="#dc2626" font-size="11" font-weight="800">2 LAYERS</text>
      </svg>
      <div class="phase-label" style="color: #dc2626;">Insoluble</div>
    </div>
  </div>

  
  <div class="spectrum-container">
    <div class="spectrum-bar">
      <div class="spectrum-segment seg-miscible" id="seg1">
        <span>1–3 Carbons:</span>
        <span>Completely Miscible</span>
      </div>
      <div class="spectrum-segment seg-partial" id="seg2">
        <span>4–5 Carbons:</span>
        <span>Partially Soluble</span>
      </div>
      <div class="spectrum-segment seg-insoluble" id="seg3">
        <span>6+ Carbons:</span>
        <span>Insoluble</span>
      </div>
    </div>
  </div>

  <script>
    const cardMethanol = document.getElementById('cardMethanol');
    const cardOctanol = document.getElementById('cardOctanol');
    const seg1 = document.getElementById('seg1');
    const seg2 = document.getElementById('seg2');
    const seg3 = document.getElementById('seg3');

    function selectMode(mode) {
      if (mode === 'miscible') {
        cardMethanol.classList.remove('dimmed');
        cardOctanol.classList.add('dimmed');
        seg1.style.filter = 'brightness(1.15)';
        seg2.style.filter = 'none';
        seg3.style.filter = 'none';
      } else if (mode === 'insoluble') {
        cardMethanol.classList.add('dimmed');
        cardOctanol.classList.remove('dimmed');
        seg1.style.filter = 'none';
        seg2.style.filter = 'none';
        seg3.style.filter = 'brightness(1.15)';
      } else {
        cardMethanol.classList.remove('dimmed');
        cardOctanol.classList.remove('dimmed');
        seg1.style.filter = 'none';
        seg2.style.filter = 'none';
        seg3.style.filter = 'none';
      }
    }

    seg1.addEventListener('click', () => selectMode('miscible'));
    cardMethanol.addEventListener('click', () => selectMode('miscible'));
    seg3.addEventListener('click', () => selectMode('insoluble'));
    cardOctanol.addEventListener('click', () => selectMode('insoluble'));
    seg2.addEventListener('click', () => selectMode('all'));
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <title>Alkane Homologous Series</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      background-color: #f8fafc;
      color: #1e2945;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      padding: 12px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      min-height: 100%;
    }
    .series-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 8px;
      width: 100%;
    }
    .molecule-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 8px 4px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }
    .molecule-name {
      font-size: 15px;
      font-weight: 700;
      color: #1e2945;
      margin-bottom: 2px;
    }
    .formula {
      font-size: 13px;
      font-weight: 600;
      color: #2563eb;
      margin-bottom: 6px;
    }
    .formula sub {
      font-size: 10px;
    }
    .structure-svg {
      width: 100%;
      height: 125px;
    }
    .data-box {
      margin-top: 6px;
      padding-top: 6px;
      border-top: 1px solid #f1f5f9;
      width: 100%;
      display: flex;
      flex-direction: column;
      gap: 2px;
    }
    .mass {
      font-size: 12px;
      font-weight: 600;
      color: #475569;
    }
    .temp {
      font-size: 13px;
      font-weight: 700;
      color: #0f172a;
    }
    .state-badge {
      display: inline-block;
      align-self: center;
      margin-top: 3px;
      padding: 2px 8px;
      background: #e0f2fe;
      color: #0284c7;
      font-size: 11px;
      font-weight: 700;
      border-radius: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .trend-container {
      margin-top: 10px;
      padding: 6px 12px;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      display: flex;
      align-items: center;
      position: relative;
    }
    .trend-arrow-wrap {
      width: 100%;
      height: 28px;
      display: flex;
      align-items: center;
      position: relative;
    }
    .trend-line {
      position: absolute;
      left: 0;
      right: 12px;
      height: 6px;
      background: linear-gradient(90deg, #93c5fd, #2563eb);
      border-radius: 3px;
    }
    .trend-head {
      position: absolute;
      right: 0;
      width: 0;
      height: 0;
      border-top: 7px solid transparent;
      border-bottom: 7px solid transparent;
      border-left: 14px solid #2563eb;
    }
    .trend-label {
      position: relative;
      z-index: 1;
      width: 100%;
      text-align: center;
      font-size: 13px;
      font-weight: 700;
      color: #1e2945;
      text-shadow: 0 0 6px #ffffff, 0 0 3px #ffffff;
    }
    @media (max-width: 480px) {
      .series-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
      }
      .structure-svg {
        height: 100px;
      }
      .molecule-name {
        font-size: 14px;
      }
      .trend-label {
        font-size: 11px;
      }
    }
  </style>
</head>
<body>

  <div class="series-grid">
    
    <div class="molecule-card">
      <div class="molecule-name">Methane</div>
      <div class="formula">CH<sub>4</sub></div>
      <svg class="structure-svg" viewBox="0 0 100 125">
        
        <line x1="50" y1="36" x2="50" y2="48" stroke="#1e2945" stroke-width="2"/>
        <line x1="50" y1="77" x2="50" y2="89" stroke="#1e2945" stroke-width="2"/>
        <line x1="28" y1="62.5" x2="40" y2="62.5" stroke="#1e2945" stroke-width="2"/>
        <line x1="60" y1="62.5" x2="72" y2="62.5" stroke="#1e2945" stroke-width="2"/>

        <text x="50" y="68" font-size="16" font-weight="bold" fill="#1e2945" text-anchor="middle">C</text>
        <text x="50" y="32" font-size="14" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="50" y="103" font-size="14" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="20" y="67" font-size="14" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="80" y="67" font-size="14" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
      </svg>
      <div class="data-box">
        <div class="mass">16 g/mol</div>
        <div class="temp">-161°C</div>
        <span class="state-badge">Gas</span>
      </div>
    </div>

    
    <div class="molecule-card">
      <div class="molecule-name">Ethane</div>
      <div class="formula">C<sub>2</sub>H<sub>6</sub></div>
      <svg class="structure-svg" viewBox="0 0 100 125">
        
        <rect x="51" y="14" width="34" height="96" rx="6" fill="#dbeafe" stroke="#93c5fd" stroke-width="1.5" stroke-dasharray="3 2"/>
        <text x="68" y="10" font-size="9" font-weight="bold" fill="#2563eb" text-anchor="middle">+CH₂</text>

        
        <line x1="32" y1="36" x2="32" y2="48" stroke="#1e2945" stroke-width="2"/>
        <line x1="32" y1="77" x2="32" y2="89" stroke="#1e2945" stroke-width="2"/>
        <line x1="68" y1="36" x2="68" y2="48" stroke="#2563eb" stroke-width="2"/>
        <line x1="68" y1="77" x2="68" y2="89" stroke="#2563eb" stroke-width="2"/>

        <line x1="12" y1="62.5" x2="23" y2="62.5" stroke="#1e2945" stroke-width="2"/>
        <line x1="41" y1="62.5" x2="59" y2="62.5" stroke="#1e2945" stroke-width="2"/>
        <line x1="77" y1="62.5" x2="88" y2="62.5" stroke="#2563eb" stroke-width="2"/>

        
        <text x="32" y="68" font-size="15" font-weight="bold" fill="#1e2945" text-anchor="middle">C</text>
        <text x="32" y="32" font-size="13" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="32" y="102" font-size="13" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="6" y="67" font-size="13" font-weight="600" fill="#64748b" text-anchor="middle">H</text>

        <text x="68" y="68" font-size="15" font-weight="bold" fill="#2563eb" text-anchor="middle">C</text>
        <text x="68" y="32" font-size="13" font-weight="bold" fill="#2563eb" text-anchor="middle">H</text>
        <text x="68" y="102" font-size="13" font-weight="bold" fill="#2563eb" text-anchor="middle">H</text>
        <text x="94" y="67" font-size="13" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
      </svg>
      <div class="data-box">
        <div class="mass">30 g/mol</div>
        <div class="temp">-89°C</div>
        <span class="state-badge">Gas</span>
      </div>
    </div>

    
    <div class="molecule-card">
      <div class="molecule-name">Propane</div>
      <div class="formula">C<sub>3</sub>H<sub>8</sub></div>
      <svg class="structure-svg" viewBox="0 0 100 125">
        
        <rect x="36" y="14" width="28" height="96" rx="6" fill="#dbeafe" stroke="#93c5fd" stroke-width="1.5" stroke-dasharray="3 2"/>
        <text x="50" y="10" font-size="9" font-weight="bold" fill="#2563eb" text-anchor="middle">+CH₂</text>

        
        <line x1="22" y1="36" x2="22" y2="48" stroke="#1e2945" stroke-width="2"/>
        <line x1="22" y1="77" x2="22" y2="89" stroke="#1e2945" stroke-width="2"/>
        <line x1="50" y1="36" x2="50" y2="48" stroke="#2563eb" stroke-width="2"/>
        <line x1="50" y1="77" x2="50" y2="89" stroke="#2563eb" stroke-width="2"/>
        <line x1="78" y1="36" x2="78" y2="48" stroke="#1e2945" stroke-width="2"/>
        <line x1="78" y1="77" x2="78" y2="89" stroke="#1e2945" stroke-width="2"/>

        
        <line x1="7" y1="62.5" x2="14" y2="62.5" stroke="#1e2945" stroke-width="2"/>
        <line x1="29" y1="62.5" x2="42" y2="62.5" stroke="#1e2945" stroke-width="2"/>
        <line x1="57" y1="62.5" x2="70" y2="62.5" stroke="#1e2945" stroke-width="2"/>
        <line x1="85" y1="62.5" x2="93" y2="62.5" stroke="#1e2945" stroke-width="2"/>

        
        <text x="22" y="68" font-size="14" font-weight="bold" fill="#1e2945" text-anchor="middle">C</text>
        <text x="22" y="32" font-size="12" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="22" y="102" font-size="12" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="3" y="67" font-size="12" font-weight="600" fill="#64748b" text-anchor="middle">H</text>

        
        <text x="50" y="68" font-size="14" font-weight="bold" fill="#2563eb" text-anchor="middle">C</text>
        <text x="50" y="32" font-size="12" font-weight="bold" fill="#2563eb" text-anchor="middle">H</text>
        <text x="50" y="102" font-size="12" font-weight="bold" fill="#2563eb" text-anchor="middle">H</text>

        
        <text x="78" y="68" font-size="14" font-weight="bold" fill="#1e2945" text-anchor="middle">C</text>
        <text x="78" y="32" font-size="12" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="78" y="102" font-size="12" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="97" y="67" font-size="12" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
      </svg>
      <div class="data-box">
        <div class="mass">44 g/mol</div>
        <div class="temp">-42°C</div>
        <span class="state-badge">Gas</span>
      </div>
    </div>

    
    <div class="molecule-card">
      <div class="molecule-name">Butane</div>
      <div class="formula">C<sub>4</sub>H<sub>10</sub></div>
      <svg class="structure-svg" viewBox="0 0 100 125">
        
        <rect x="52" y="14" width="22" height="96" rx="5" fill="#dbeafe" stroke="#93c5fd" stroke-width="1.5" stroke-dasharray="3 2"/>
        <text x="63" y="10" font-size="9" font-weight="bold" fill="#2563eb" text-anchor="middle">+CH₂</text>

        
        <line x1="17" y1="36" x2="17" y2="48" stroke="#1e2945" stroke-width="1.8"/>
        <line x1="17" y1="77" x2="17" y2="89" stroke="#1e2945" stroke-width="1.8"/>
        <line x1="40" y1="36" x2="40" y2="48" stroke="#1e2945" stroke-width="1.8"/>
        <line x1="40" y1="77" x2="40" y2="89" stroke="#1e2945" stroke-width="1.8"/>
        <line x1="63" y1="36" x2="63" y2="48" stroke="#2563eb" stroke-width="1.8"/>
        <line x1="63" y1="77" x2="63" y2="89" stroke="#2563eb" stroke-width="1.8"/>
        <line x1="85" y1="36" x2="85" y2="48" stroke="#1e2945" stroke-width="1.8"/>
        <line x1="85" y1="77" x2="85" y2="89" stroke="#1e2945" stroke-width="1.8"/>

        
        <line x1="5" y1="62.5" x2="11" y2="62.5" stroke="#1e2945" stroke-width="1.8"/>
        <line x1="23" y1="62.5" x2="34" y2="62.5" stroke="#1e2945" stroke-width="1.8"/>
        <line x1="46" y1="62.5" x2="57" y2="62.5" stroke="#1e2945" stroke-width="1.8"/>
        <line x1="69" y1="62.5" x2="79" y2="62.5" stroke="#1e2945" stroke-width="1.8"/>
        <line x1="91" y1="62.5" x2="96" y2="62.5" stroke="#1e2945" stroke-width="1.8"/>

        
        <text x="17" y="67" font-size="13" font-weight="bold" fill="#1e2945" text-anchor="middle">C</text>
        <text x="17" y="32" font-size="11" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="17" y="102" font-size="11" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="2" y="66.5" font-size="11" font-weight="600" fill="#64748b" text-anchor="middle">H</text>

        
        <text x="40" y="67" font-size="13" font-weight="bold" fill="#1e2945" text-anchor="middle">C</text>
        <text x="40" y="32" font-size="11" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="40" y="102" font-size="11" font-weight="600" fill="#64748b" text-anchor="middle">H</text>

        
        <text x="63" y="67" font-size="13" font-weight="bold" fill="#2563eb" text-anchor="middle">C</text>
        <text x="63" y="32" font-size="11" font-weight="bold" fill="#2563eb" text-anchor="middle">H</text>
        <text x="63" y="102" font-size="11" font-weight="bold" fill="#2563eb" text-anchor="middle">H</text>

        
        <text x="85" y="67" font-size="13" font-weight="bold" fill="#1e2945" text-anchor="middle">C</text>
        <text x="85" y="32" font-size="11" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="85" y="102" font-size="11" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
        <text x="98" y="66.5" font-size="11" font-weight="600" fill="#64748b" text-anchor="middle">H</text>
      </svg>
      <div class="data-box">
        <div class="mass">58 g/mol</div>
        <div class="temp">-0.5°C</div>
        <span class="state-badge">Gas</span>
      </div>
    </div>
  </div>

  
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    <div class="trend-arrow-wrap">
      <div class="trend-line"></div>
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Pengenalan Konsep Mol dan Bilangan Avogadro

Konversi Mol ke Jumlah Partikel

OGS.11.PS.OR.1

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