<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Acetone Fragmentation (Mass Spectrometry)</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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      display: flex;
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      max-width: 640px;
      display: flex;
      flex-direction: column;
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    /* Step Navigation */
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      gap: 12px;
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    /* Molecule Cards */
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      border-radius: 10px;
      padding: 12px 10px;
      display: flex;
      flex-direction: column;
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      gap: 8px;
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      border: 2px solid #cbd5e1;
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    .mol-formula {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 15px;
      font-weight: 700;
      letter-spacing: -0.2px;
      line-height: 1.3;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
      font-size: 11px;
      font-weight: 700;
      padding: 4px 9px;
      border-radius: 6px;
      line-height: 1.2;
    }

    /* Parent Box */
    .parent-card {
      border-color: #64748b;
      background: #f8fafc;
      color: #0f172a;
    }
    
    .parent-card .badge-title {
      background: #e2e8f0;
      color: #0f172a;
    }
    
    .parent-card .badge-mz {
      background: #0f172a;
      color: #ffffff;
    }

    /* Cleavage Indicator */
    .arrow-col {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 6px;
      color: #334155;
      font-size: 11px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      text-align: center;
      transition: opacity 0.3s ease;
      padding: 4px;
    }
    
    .arrow-label {
      line-height: 1.2;
      white-space: nowrap;
    }
    
    .arrow-svg {
      width: 28px;
      height: 28px;
      fill: none;
      stroke: #334155;
      stroke-width: 2.5;
      stroke-linecap: round;
      stroke-linejoin: round;
      transition: transform 0.2s ease;
    }

    /* Right Products Group */
    .products-container {
      display: flex;
      flex-direction: column;
      gap: 10px;
      transition: opacity 0.3s ease;
    }

    /* High contrast product boxes */
    /* Neutral Radical (Red tint) */
    .product-radical {
      background: #fff1f2;
      border: 2px solid #be123c;
      color: #4c0519;
    }
    
    .product-radical .mol-formula {
      color: #881337;
    }
    
    .product-radical .status-tag {
      color: #701a2e;
      font-weight: 700;
      font-size: 11.5px;
    }
    
    .product-radical .badge {
      background: #9f1239;
      color: #ffffff;
    }

    /* Acylium Cation (Blue tint) */
    .product-ion {
      background: #f0f9ff;
      border: 2px solid #0284c7;
      color: #082f49;
    }
    
    .product-ion .mol-formula {
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    }
    
    .product-ion .status-tag {
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      font-weight: 700;
      font-size: 11.5px;
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    .product-ion .badge {
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    /* Status Tags */
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      align-items: center;
      justify-content: center;
      gap: 4px;
      line-height: 1.2;
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    /* Stepper States */
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      opacity: 0.35;
    }
    
    .highlighted {
      border-color: #0284c7;
      box-shadow: 0 0 0 2px #0284c7;
    }
    
    .bond-cut {
      color: #b91c1c;
      font-weight: 900;
      padding: 0 1px;
    }

    /* Responsive Mobile Layout */
    @media (max-width: 520px) {
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        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
        gap: 10px;
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      .arrow-col {
        flex-direction: row;
        gap: 8px;
        padding: 4px 0;
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        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
      }
      
      .mol-formula {
        font-size: 13.5px;
      }
    }
  </style>
</head>
<body>

  <div class="diagram-stage">
    
    <div class="controls">
      <div class="step-tabs">
        <button class="step-btn active" data-step="0">1. Molecular Ion</button>
        <button class="step-btn" data-step="1">2. C–C Cleavage</button>
        <button class="step-btn" data-step="2">3. Products</button>
      </div>
      <button id="playBtn" class="play-btn" aria-label="Toggle autoplay">⏸</button>
    </div>

    
    <div class="reaction-flow">
      
      
      <div id="parentBox" class="mol-card parent-card">
        <span class="badge badge-title">Molecular Ion</span>
        <div class="mol-formula" id="parentFormula">[CH<sub>3</sub>–CO–CH<sub>3</sub>]<sup>+•</sup></div>
        <span class="badge badge-mz">m/z = 58</span>
      </div>

      
      <div id="arrowBox" class="arrow-col">
        <span class="arrow-label">C–C Cleavage</span>
        <svg class="arrow-svg" viewBox="0 0 24 24" aria-hidden="true">
          <line x1="4" y1="12" x2="18" y2="12"></line>
          <polyline points="12 6 18 12 12 18"></polyline>
        </svg>
      </div>

      
      <div id="productsBox" class="products-container">
        
        
        <div id="radCard" class="mol-card product-radical">
          <div class="mol-formula">•CH<sub>3</sub></div>
          <div class="status-tag">✕ Neutral (Mass 15)</div>
          <div class="badge">Invisible to detector</div>
        </div>

        
        <div id="ionCard" class="mol-card product-ion">
          <div class="mol-formula">[CH<sub>3</sub>–C≡O]<sup>+</sup></div>
          <div class="status-tag">✓ Acylium Ion (m/z 43)</div>
          <div class="badge">Detected as Base Peak</div>
        </div>

      </div>

    </div>
  </div>

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    // Initialize first step & autoplay
    goTo(0);
    startTimer();
  </script>
</body>
</html>

Mass Spectrometry: Molecular Ion Peak and High Resolution

<!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;
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    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: transparent;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      min-height: 100%;
    }
    .cards-row {
      display: flex;
      gap: 12px;
      width: 100%;
      flex-wrap: wrap;
    }
    .spec-card {
      flex: 1 1 240px;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 12px 14px;
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      flex-direction: column;
      gap: 8px;
      cursor: pointer;
      transition: border-color 0.2s, box-shadow 0.2s;
      user-select: none;
    }
    .spec-card:hover, .spec-card.active {
      border-color: #22b7ff;
      box-shadow: 0 0 0 2px rgba(34, 183, 255, 0.25);
    }
    .card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
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    .card-title {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
    }
    .ratio-badge {
      font-size: 13px;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 6px;
      background: #eff6ff;
      color: #2563eb;
      border: 1px solid #bfdbfe;
    }
    .spectrum-box {
      position: relative;
      height: 150px;
      background: #f8fafc;
      border-radius: 8px;
      border-bottom: 2px solid #64748b;
      display: flex;
      align-items: flex-end;
      justify-content: center;
      gap: 40px;
      padding: 0 20px 10px;
    }
    .grid-lines {
      position: absolute;
      inset: 0;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      pointer-events: none;
      padding: 8px 0;
      opacity: 0.35;
    }
    .grid-line {
      border-bottom: 1px dashed #94a3b8;
      width: 100%;
    }
    .peak-group {
      position: relative;
      display: flex;
      flex-direction: column;
      align-items: center;
      height: 100%;
      justify-content: flex-end;
      z-index: 1;
    }
    .peak-bar {
      width: 14px;
      border-radius: 3px 3px 0 0;
      transition: height 0.4s ease, background-color 0.2s;
    }
    .peak-val {
      font-size: 11px;
      font-weight: 700;
      margin-bottom: 4px;
      color: #475569;
    }
    .peak-label {
      font-size: 13px;
      font-weight: 700;
      margin-top: 6px;
      color: #1e2945;
    }
    .cl-peak {
      background: #0284c7;
    }
    .br-peak {
      background: #7c3aed;
    }
    .delta-marker {
      position: absolute;
      top: 22px;
      font-size: 12px;
      font-weight: 600;
      color: #64748b;
      background: #ffffff;
      padding: 1px 6px;
      border-radius: 4px;
      border: 1px solid #cbd5e1;
      z-index: 2;
    }
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      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 12px 16px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
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      font-size: 13px;
      font-weight: 700;
      color: #475569;
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      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-size: 15px;
      font-weight: 600;
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      flex-wrap: wrap;
      padding: 4px 0;
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      display: inline-flex;
      flex-direction: column;
      vertical-align: middle;
      text-align: center;
      padding: 0 4px;
    }
    .fraction-top {
      border-bottom: 1.5px solid #1e2945;
      padding-bottom: 2px;
    }
    .fraction-bottom {
      padding-top: 2px;
    }
    .highlight-m1 {
      color: #ea580c;
      font-weight: 700;
    }
    .highlight-m {
      color: #0284c7;
      font-weight: 700;
    }
  </style>
</head>
<body>

  <div class="cards-row">
    
    <div class="spec-card active" id="clCard" onclick="selectCard('cl')">
      <div class="card-header">
        <span class="card-title">Chlorine (<sup>35</sup>Cl : <sup>37</sup>Cl)</span>
        <span class="ratio-badge">3 : 1</span>
      </div>
      <div class="spectrum-box">
        <div class="grid-lines">
          <div class="grid-line"></div>
          <div class="grid-line"></div>
          <div class="grid-line"></div>
        </div>
        <div class="delta-marker">+2 m/z</div>
        
        <div class="peak-group">
          <span class="peak-val">100%</span>
          <div class="peak-bar cl-peak" style="height: 105px;"></div>
          <span class="peak-label">M</span>
        </div>

        <div class="peak-group">
          <span class="peak-val">33%</span>
          <div class="peak-bar cl-peak" style="height: 35px; opacity: 0.85;"></div>
          <span class="peak-label">M+2</span>
        </div>
      </div>
    </div>

    
    <div class="spec-card" id="brCard" onclick="selectCard('br')">
      <div class="card-header">
        <span class="card-title">Bromine (<sup>79</sup>Br : <sup>81</sup>Br)</span>
        <span class="ratio-badge" style="background:#f5f3ff; color:#7c3aed; border-color:#ddd6fe;">1 : 1</span>
      </div>
      <div class="spectrum-box">
        <div class="grid-lines">
          <div class="grid-line"></div>
          <div class="grid-line"></div>
          <div class="grid-line"></div>
        </div>
        <div class="delta-marker">+2 m/z</div>

        <div class="peak-group">
          <span class="peak-val">100%</span>
          <div class="peak-bar br-peak" style="height: 105px;"></div>
          <span class="peak-label">M</span>
        </div>

        <div class="peak-group">
          <span class="peak-val">98%</span>
          <div class="peak-bar br-peak" style="height: 103px; opacity: 0.85;"></div>
          <span class="peak-label">M+2</span>
        </div>
      </div>
    </div>
  </div>

  
  <div class="formula-card">
    <div class="formula-title">Carbon Count Estimation (<sup>13</sup>C Abundance)</div>
    <div class="formula-math">
      <span>Number of Carbons ≈</span>
      <div class="fraction">
        <span class="fraction-top">Abundance of <span class="highlight-m1">(M+1)</span></span>
        <span class="fraction-bottom">Abundance of <span class="highlight-m">M</span> × 0.011</span>
      </div>
    </div>
  </div>

  <script>
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      const br = document.getElementById('brCard');
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        br.classList.remove('active');
      } else {
        br.classList.add('active');
        cl.classList.remove('active');
      }
    }
  </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">
  <link rel="stylesheet" href="{{VENDOR_CDN}}/katex.min.css">
  <script src="{{VENDOR_CDN}}/katex.min.js"></script>
  <style>
    * {
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      -webkit-tap-highlight-color: transparent;
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    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      background: #f8fafc;
      color: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-start;
      gap: 12px;
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    .header-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 620px;
      gap: 8px;
    }

    .badge-nominal {
      background: #e2e8f0;
      color: #475569;
      font-size: 13px;
      font-weight: 700;
      padding: 5px 10px;
      border-radius: 6px;
      letter-spacing: 0.2px;
    }

    .toggle-group {
      display: inline-flex;
      background: #e2e8f0;
      padding: 3px;
      border-radius: 8px;
      gap: 2px;
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      font-weight: 600;
      color: #64748b;
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      transition: all 0.2s ease;
    }

    .toggle-btn.active {
      background: #ffffff;
      color: #0284c7;
      box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    }

    /* Spectrum Graph */
    .spectrum-panel {
      width: 100%;
      max-width: 620px;
      height: 90px;
      background: #ffffff;
      border-radius: 10px;
      border: 1px solid #e2e8f0;
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 0 16px 18px;
    }

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      bottom: 18px;
      left: 16px;
      right: 16px;
      height: 1px;
      background: #cbd5e1;
    }

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      position: absolute;
      bottom: 18px;
      transform: translateX(-50%);
      display: flex;
      flex-direction: column;
      align-items: center;
      transition: left 0.5s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
    }

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      width: 3px;
      border-radius: 2px 2px 0 0;
      background: #0284c7;
      height: 48px;
    }

    .peak-label {
      position: absolute;
      bottom: 50px;
      font-size: 11px;
      font-weight: 700;
      white-space: nowrap;
      padding: 1px 5px;
      border-radius: 4px;
      background: #f1f5f9;
      color: #0f172a;
    }

    .peak-tag-sub {
      position: absolute;
      top: 20px;
      font-size: 10px;
      color: #64748b;
      font-weight: 600;
      white-space: nowrap;
    }

    /* Isobar Cards */
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      width: 100%;
      max-width: 620px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .mol-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 10px;
      padding: 10px 14px;
      display: grid;
      grid-template-columns: 140px 1fr auto;
      align-items: center;
      gap: 12px;
      transition: box-shadow 0.2s ease, border-color 0.2s ease;
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    .mol-card.highlight {
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      box-shadow: 0 2px 8px rgba(56, 189, 248, 0.15);
    }

    .mol-info {
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .mol-name {
      font-size: 12px;
      font-weight: 700;
      color: #334155;
    }

    .mol-formula {
      font-size: 14px;
      color: #0369a1;
      font-weight: 600;
    }

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      font-size: 11.5px;
      color: #475569;
      background: #f8fafc;
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      white-space: nowrap;
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    .mass-result {
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      min-width: 90px;
    }

    .mass-val {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      letter-spacing: -0.3px;
    }

    .decimal-diff {
      background: #fef08a;
      color: #854d0e;
      padding: 1px 3px;
      border-radius: 3px;
      font-weight: 800;
    }

    .mass-sub {
      font-size: 10px;
      color: #64748b;
      font-weight: 600;
    }

    @media (max-width: 520px) {
      body {
        padding: 8px;
        gap: 8px;
      }
      .mol-card {
        grid-template-columns: 1fr auto;
        gap: 6px;
        padding: 8px 10px;
      }
      .calc-box {
        grid-column: 1 / -1;
        order: 3;
        font-size: 10.5px;
        padding: 4px 6px;
      }
      .mol-name { font-size: 11px; }
      .mol-formula { font-size: 13px; }
      .mass-val { font-size: 13.5px; }
    }
  </style>
</head>
<body>

  
  <div class="header-bar">
    <div class="badge-nominal">Nominal Mass = 60</div>
    <div class="toggle-group">
      <button class="toggle-btn" id="btnLow" onclick="setMode('low')">Low Resolution</button>
      <button class="toggle-btn active" id="btnHigh" onclick="setMode('high')">High Resolution</button>
    </div>
  </div>

  
  <div class="spectrum-panel">
    <div class="axis-line"></div>

    
    <div class="peak-group" id="lowPeak" style="left: 50%; opacity: 0; pointer-events: none;">
      <div class="peak-label">m/z 60</div>
      <div class="peak-stem" style="height: 52px; background: #94a3b8; width: 6px;"></div>
      <div class="peak-tag-sub">1 unresolved peak</div>
    </div>

    
    <div class="peak-group" id="peak1" style="left: 24%; opacity: 1;">
      <div class="peak-label">60.0210</div>
      <div class="peak-stem" style="height: 48px; background: #0284c7;"></div>
      <div class="peak-tag-sub">C₂H₄O₂</div>
    </div>

    <div class="peak-group" id="peak2" style="left: 50%; opacity: 1;">
      <div class="peak-label">60.0573</div>
      <div class="peak-stem" style="height: 50px; background: #0ea5e9;"></div>
      <div class="peak-tag-sub">C₃H₈O</div>
    </div>

    <div class="peak-group" id="peak3" style="left: 76%; opacity: 1;">
      <div class="peak-label">60.0686</div>
      <div class="peak-stem" style="height: 46px; background: #38bdf8;"></div>
      <div class="peak-tag-sub">C₂H₈N₂</div>
    </div>
  </div>

  
  <div class="cards-container">

    
    <div class="mol-card highlight" id="card1">
      <div class="mol-info">
        <div class="mol-name">Ethanoic acid</div>
        <div class="mol-formula" id="f1"></div>
      </div>
      <div class="calc-box" id="c1"></div>
      <div class="mass-result">
        <div class="mass-val">60.<span class="decimal-diff">0210</span></div>
        <div class="mass-sub">Exact Mass (u)</div>
      </div>
    </div>

    
    <div class="mol-card" id="card2">
      <div class="mol-info">
        <div class="mol-name">Propan-1-ol</div>
        <div class="mol-formula" id="f2"></div>
      </div>
      <div class="calc-box" id="c2"></div>
      <div class="mass-result">
        <div class="mass-val">60.<span class="decimal-diff">0573</span></div>
        <div class="mass-sub">Exact Mass (u)</div>
      </div>
    </div>

    
    <div class="mol-card" id="card3">
      <div class="mol-info">
        <div class="mol-name">Ethylenediamine</div>
        <div class="mol-formula" id="f3"></div>
      </div>
      <div class="calc-box" id="c3"></div>
      <div class="mass-result">
        <div class="mass-val">60.<span class="decimal-diff">0686</span></div>
        <div class="mass-sub">Exact Mass (u)</div>
      </div>
    </div>

  </div>

  <script>
    // Render KaTeX chemical formulas & exact arithmetic
    window.addEventListener('DOMContentLoaded', () => {
      if (window.katex) {
        katex.render('\\text{C}_2\\text{H}_4\\text{O}_2', document.getElementById('f1'));
        katex.render('2(12.0000) + 4(1.0078) + 2(15.9949)', document.getElementById('c1'));

        katex.render('\\text{C}_3\\text{H}_8\\text{O}', document.getElementById('f2'));
        katex.render('3(12.0000) + 8(1.0078) + 15.9949', document.getElementById('c2'));

        katex.render('\\text{C}_2\\text{H}_8\\text{N}_2', document.getElementById('f3'));
        katex.render('2(12.0000) + 8(1.0078) + 2(14.0031)', document.getElementById('c3'));
      } else {
        document.getElementById('f1').textContent = 'C₂H₄O₂';
        document.getElementById('c1').textContent = '2(12.0000) + 4(1.0078) + 2(15.9949)';
        document.getElementById('f2').textContent = 'C₃H₈O';
        document.getElementById('c2').textContent = '3(12.0000) + 8(1.0078) + 15.9949';
        document.getElementById('f3').textContent = 'C₂H₈N₂';
        document.getElementById('c3').textContent = '2(12.0000) + 8(1.0078) + 2(14.0031)';
      }
    });

    function setMode(mode) {
      const isHigh = mode === 'high';
      document.getElementById('btnHigh').classList.toggle('active', isHigh);
      document.getElementById('btnLow').classList.toggle('active', !isHigh);

      const lowPeak = document.getElementById('lowPeak');
      const p1 = document.getElementById('peak1');
      const p2 = document.getElementById('peak2');
      const p3 = document.getElementById('peak3');

      if (isHigh) {
        lowPeak.style.opacity = '0';
        p1.style.opacity = '1';
        p1.style.left = '24%';
        p2.style.opacity = '1';
        p2.style.left = '50%';
        p3.style.opacity = '1';
        p3.style.left = '76%';
      } else {
        lowPeak.style.opacity = '1';
        p1.style.opacity = '0';
        p1.style.left = '50%';
        p2.style.opacity = '0';
        p2.style.left = '50%';
        p3.style.opacity = '0';
        p3.style.left = '50%';
      }
    }
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Mass Spectrum Diagram</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
      user-select: none;
    }

    body {
      width: 100%;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #0f172a;
      background: transparent;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 6px;
    }

    .controls {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      justify-content: center;
      margin-bottom: 10px;
      width: 100%;
      max-width: 600px;
    }

    .btn-tab {
      background: #f1f5f9;
      border: 1.5px solid #cbd5e1;
      border-radius: 20px;
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      cursor: pointer;
      transition: background-color 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
    }

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

    .btn-tab.active-all {
      background: #0f172a;
      color: #ffffff;
      border-color: #0f172a;
    }

    .btn-tab.active-base {
      background: #10b981;
      color: #ffffff;
      border-color: #059669;
      box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.25);
    }

    .btn-tab.active-m {
      background: #2563eb;
      color: #ffffff;
      border-color: #1d4ed8;
      box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.25);
    }

    .btn-tab.active-m1 {
      background: #d97706;
      color: #ffffff;
      border-color: #b45309;
      box-shadow: 0 0 0 2px rgba(217, 119, 6, 0.25);
    }

    .svg-container {
      width: 100%;
      max-width: 600px;
      position: relative;
    }

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

    .peak-line {
      transition: stroke 0.25s ease, opacity 0.25s ease;
      cursor: pointer;
    }

    .peak-hitbox {
      cursor: pointer;
      stroke: transparent;
      stroke-width: 24;
    }

    .badge-group {
      transition: opacity 0.25s ease;
      cursor: pointer;
    }

    .dimmed {
      opacity: 0.18;
    }

    .highlighted {
      opacity: 1 !important;
    }

    text {
      font-family: inherit;
    }

    @media (max-width: 420px) {
      .btn-tab {
        font-size: 12px;
        padding: 5px 10px;
      }
    }
  </style>
</head>
<body>

  <div class="controls">
    <button class="btn-tab active-all" id="btn-all" onclick="selectPeak('all')">Show All</button>
    <button class="btn-tab" id="btn-base" onclick="selectPeak('base')">Base Peak (m/z 43)</button>
    <button class="btn-tab" id="btn-m" onclick="selectPeak('m')">Molecular Ion M⁺• (m/z 58)</button>
    <button class="btn-tab" id="btn-m1" onclick="selectPeak('m1')">M+1 Peak (m/z 59)</button>
  </div>

  <div class="svg-container">
    <svg viewBox="0 0 600 395" id="mass-spec-svg">
      
      <g stroke="#cbd5e1" stroke-width="1" stroke-dasharray="3 3" opacity="0.75">
        
        <line x1="72" y1="58" x2="570" y2="58" />
        <line x1="72" y1="126" x2="570" y2="126" />
        <line x1="72" y1="194" x2="570" y2="194" />
        <line x1="72" y1="262" x2="570" y2="262" />
        <line x1="72" y1="330" x2="570" y2="330" />

        
        <line x1="72" y1="58" x2="72" y2="330" />
        <line x1="134" y1="58" x2="134" y2="330" />
        <line x1="196" y1="58" x2="196" y2="330" />
        <line x1="259" y1="58" x2="259" y2="330" />
        <line x1="321" y1="58" x2="321" y2="330" />
        <line x1="383" y1="58" x2="383" y2="330" />
        <line x1="445" y1="58" x2="445" y2="330" />
        <line x1="508" y1="58" x2="508" y2="330" />
        <line x1="570" y1="58" x2="570" y2="330" />
      </g>

      
      <line x1="72" y1="330" x2="576" y2="330" stroke="#475569" stroke-width="2" stroke-linecap="square" />
      <line x1="72" y1="50" x2="72" y2="330" stroke="#475569" stroke-width="2" stroke-linecap="square" />

      
      <g font-size="13" fill="#475569" text-anchor="end" font-weight="600">
        <line x1="66" y1="58" x2="72" y2="58" stroke="#475569" stroke-width="1.5" />
        <text x="62" y="63">100</text>

        <line x1="66" y1="126" x2="72" y2="126" stroke="#475569" stroke-width="1.5" />
        <text x="62" y="131">75</text>

        <line x1="66" y1="194" x2="72" y2="194" stroke="#475569" stroke-width="1.5" />
        <text x="62" y="199">50</text>

        <line x1="66" y1="262" x2="72" y2="262" stroke="#475569" stroke-width="1.5" />
        <text x="62" y="267">25</text>

        <line x1="66" y1="330" x2="72" y2="330" stroke="#475569" stroke-width="1.5" />
        <text x="62" y="335">0</text>
      </g>

      
      <g font-size="13" fill="#475569" text-anchor="middle" font-weight="600">
        <line x1="72" y1="330" x2="72" y2="336" stroke="#475569" stroke-width="1.5" />
        <text x="72" y="352">0</text>

        <line x1="134" y1="330" x2="134" y2="336" stroke="#475569" stroke-width="1.5" />
        <text x="134" y="352">10</text>

        <line x1="196" y1="330" x2="196" y2="336" stroke="#475569" stroke-width="1.5" />
        <text x="196" y="352">20</text>

        <line x1="259" y1="330" x2="259" y2="336" stroke="#475569" stroke-width="1.5" />
        <text x="259" y="352">30</text>

        <line x1="321" y1="330" x2="321" y2="336" stroke="#475569" stroke-width="1.5" />
        <text x="321" y="352">40</text>

        <line x1="383" y1="330" x2="383" y2="336" stroke="#475569" stroke-width="1.5" />
        <text x="383" y="352">50</text>

        <line x1="445" y1="330" x2="445" y2="336" stroke="#475569" stroke-width="1.5" />
        <text x="445" y="352">60</text>

        <line x1="508" y1="330" x2="508" y2="336" stroke="#475569" stroke-width="1.5" />
        <text x="508" y="352">70</text>

        <line x1="570" y1="330" x2="570" y2="336" stroke="#475569" stroke-width="1.5" />
        <text x="570" y="352">80</text>
      </g>

      
      <text transform="rotate(-90)" x="-194" y="24" font-size="14" font-weight="700" fill="#0f172a" text-anchor="middle">
        Relative Abundance (%)
      </text>
      <text x="321" y="382" font-size="15" font-weight="700" fill="#0f172a" text-anchor="middle">
        m/z
      </text>

      
      <g class="peak-group fragment-peaks">
        <line x1="165" y1="330" x2="165" y2="290" stroke="#94a3b8" stroke-width="3" stroke-linecap="round" />
        <line x1="240" y1="330" x2="240" y2="278" stroke="#94a3b8" stroke-width="3" stroke-linecap="round" />
        <line x1="253" y1="330" x2="253" y2="310" stroke="#94a3b8" stroke-width="3" stroke-linecap="round" />
        <line x1="346" y1="330" x2="346" y2="318" stroke="#94a3b8" stroke-width="3" stroke-linecap="round" />
      </g>

      
      <g class="peak-group" id="group-base" onclick="selectPeak('base')">
        <line x1="340" y1="330" x2="340" y2="58" class="peak-hitbox" />
        <line x1="340" y1="330" x2="340" y2="58" stroke="#10b981" stroke-width="5" stroke-linecap="round" class="peak-line" id="line-base" />
        
        
        <g class="badge-group" id="badge-base" transform="translate(340, 42)">
          <rect x="-85" y="-24" width="170" height="26" rx="13" fill="#10b981" />
          <text x="0" y="-6" fill="#ffffff" font-size="12.5" font-weight="700" text-anchor="middle">
            Base Peak (m/z 43)
          </text>
        </g>
      </g>

      
      <g class="peak-group" id="group-m" onclick="selectPeak('m')">
        <line x1="433" y1="330" x2="433" y2="254" class="peak-hitbox" />
        <line x1="433" y1="330" x2="433" y2="254" stroke="#2563eb" stroke-width="4.5" stroke-linecap="round" class="peak-line" id="line-m" />
        
        
        <g class="badge-group" id="badge-m" transform="translate(433, 238)">
          <rect x="-70" y="-24" width="140" height="26" rx="13" fill="#2563eb" />
          <text x="0" y="-6" fill="#ffffff" font-size="12.5" font-weight="700" text-anchor="middle">
            M⁺• Peak (m/z 58)
          </text>
        </g>
      </g>

      
      <g class="peak-group" id="group-m1" onclick="selectPeak('m1')">
        <line x1="439" y1="330" x2="439" y2="324" class="peak-hitbox" />
        <line x1="439" y1="330" x2="439" y2="324" stroke="#d97706" stroke-width="3" stroke-linecap="round" class="peak-line" id="line-m1" />
        
        
        <g class="badge-group" id="badge-m1" transform="translate(505, 305)">
          <path d="M -30 2 L -63 18" stroke="#d97706" stroke-width="1.5" stroke-dasharray="3 2" fill="none" />
          <circle cx="-63" cy="18" r="3" fill="#d97706" />
          <rect x="-32" y="-13" width="86" height="24" rx="12" fill="#d97706" />
          <text x="11" y="4" fill="#ffffff" font-size="12" font-weight="700" text-anchor="middle">
            M+1 (59)
          </text>
        </g>
      </g>
    </svg>
  </div>

  <script>
    function selectPeak(target) {
      const btnAll = document.getElementById('btn-all');
      const btnBase = document.getElementById('btn-base');
      const btnM = document.getElementById('btn-m');
      const btnM1 = document.getElementById('btn-m1');

      const grpBase = document.getElementById('group-base');
      const grpM = document.getElementById('group-m');
      const grpM1 = document.getElementById('group-m1');
      const grpFragments = document.querySelector('.fragment-peaks');

      // Reset button classes
      [btnAll, btnBase, btnM, btnM1].forEach(b => {
        b.className = 'btn-tab';
      });

      // Reset peak opacities
      [grpBase, grpM, grpM1, grpFragments].forEach(g => {
        g.classList.remove('dimmed', 'highlighted');
      });

      if (target === 'all') {
        btnAll.classList.add('active-all');
      } else if (target === 'base') {
        btnBase.classList.add('active-base');
        grpM.classList.add('dimmed');
        grpM1.classList.add('dimmed');
        grpFragments.classList.add('dimmed');
        grpBase.classList.add('highlighted');
      } else if (target === 'm') {
        btnM.classList.add('active-m');
        grpBase.classList.add('dimmed');
        grpM1.classList.add('dimmed');
        grpFragments.classList.add('dimmed');
        grpM.classList.add('highlighted');
      } else if (target === 'm1') {
        btnM1.classList.add('active-m1');
        grpBase.classList.add('dimmed');
        grpM.classList.add('dimmed');
        grpFragments.classList.add('dimmed');
        grpM1.classList.add('highlighted');
      }
    }
  </script>
</body>
</html>

OGS.13.CH.9

Aligned learning resources

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