<!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">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: #ffffff;
      width: 100%;
      min-height: 100%;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      padding: 10px 8px;
    }

    /* Step Selector Tabs */
    .controls {
      display: flex;
      gap: 6px;
      width: 100%;
      max-width: 380px;
      justify-content: center;
      margin-bottom: 6px;
    }

    .step-btn {
      flex: 1;
      padding: 6px 4px;
      border: 1px solid #cbd5e1;
      border-radius: 6px;
      background: #f8fafc;
      color: #64748b;
      font-size: 12px;
      font-weight: 600;
      cursor: pointer;
      text-align: center;
      transition: all 0.25s ease;
      user-select: none;
    }

    .step-btn.active {
      background: #0284c7;
      color: #ffffff;
      border-color: #0284c7;
      box-shadow: 0 2px 4px rgba(2, 132, 199, 0.2);
    }

    /* Diagram Stage */
    .stage {
      position: relative;
      width: 100%;
      max-width: 380px;
      height: 180px;
      background: #f8fafc;
      border-radius: 12px;
      border: 1px solid #e2e8f0;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    /* Animated Cell Elements */
    .cell-layer {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
    }

    /* Badges / Metrics */
    .badges-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 6px;
      width: 100%;
      max-width: 380px;
      margin-top: 6px;
    }

    .badge-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 6px 10px;
      font-size: 11.5px;
    }

    .badge-label {
      font-weight: 600;
      color: #64748b;
      display: flex;
      align-items: center;
      gap: 5px;
    }

    .badge-val {
      font-weight: 700;
      color: #1e2945;
      text-align: right;
    }

    .tag-blue {
      background: #e0f2fe;
      color: #0369a1;
      padding: 2px 6px;
      border-radius: 4px;
    }

    .tag-yellow {
      background: #fef3c7;
      color: #b45309;
      padding: 2px 6px;
      border-radius: 4px;
    }

    .tag-mixed {
      background: linear-gradient(135deg, #e0f2fe 50%, #fef3c7 50%);
      color: #1e2945;
      padding: 2px 6px;
      border-radius: 4px;
      border: 1px solid #cbd5e1;
    }

    /* Playback bar */
    .play-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 380px;
      margin-top: 4px;
      padding: 0 4px;
    }

    .play-btn {
      background: none;
      border: none;
      font-size: 13px;
      font-weight: 600;
      color: #0284c7;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 4px;
    }
  </style>
</head>
<body>

  
  <div class="controls">
    <button class="step-btn active" id="btn0" onclick="setStep(0)">1. Gametes</button>
    <button class="step-btn" id="btn1" onclick="setStep(1)">2. Fusion</button>
    <button class="step-btn" id="btn2" onclick="setStep(2)">3. Offspring</button>
  </div>

  
  <div class="stage">
    <svg class="cell-layer" viewBox="0 0 380 180" id="svgStage">
      <defs>
        
        <pattern id="blueStripes" width="8" height="8" patternTransform="rotate(45)" patternUnits="userSpaceOnUse">
          <line x1="0" y1="0" x2="0" y2="8" stroke="#0284c7" stroke-width="4" />
          <line x1="4" y1="0" x2="4" y2="8" stroke="#bae6fd" stroke-width="4" />
        </pattern>
        
        <pattern id="yellowStripes" width="8" height="8" patternTransform="rotate(45)" patternUnits="userSpaceOnUse">
          <line x1="0" y1="0" x2="0" y2="8" stroke="#d97706" stroke-width="4" />
          <line x1="4" y1="0" x2="4" y2="8" stroke="#fef08a" stroke-width="4" />
        </pattern>
        
        <pattern id="mixedStripes" width="12" height="12" patternTransform="rotate(45)" patternUnits="userSpaceOnUse">
          <rect x="0" y="0" width="6" height="12" fill="#0284c7" />
          <rect x="6" y="0" width="6" height="12" fill="#facc15" />
        </pattern>
      </defs>

      
      <g id="fusionSymbols" opacity="0" style="transition: opacity 0.4s ease;">
        <circle cx="190" cy="85" r="14" fill="#ffffff" stroke="#cbd5e1" stroke-width="1.5" />
        <text x="190" y="90" text-anchor="middle" font-size="16" font-weight="bold" fill="#0284c7">+</text>
      </g>

      
      <g id="maleGroup" style="transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);">
        
        <circle cx="95" cy="85" r="38" fill="#f0f9ff" stroke="#38bdf8" stroke-width="2.5" />
        
        <circle cx="95" cy="85" r="20" fill="url(#blueStripes)" stroke="#0284c7" stroke-width="2" />
        <text id="maleLabel" x="95" y="140" text-anchor="middle" font-size="12" font-weight="700" fill="#0369a1">Male (n)</text>
      </g>

      
      <g id="femaleGroup" style="transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);">
        
        <circle cx="285" cy="85" r="38" fill="#fefce8" stroke="#facc15" stroke-width="2.5" />
        
        <circle cx="285" cy="85" r="20" fill="url(#yellowStripes)" stroke="#d97706" stroke-width="2" />
        <text id="femaleLabel" x="285" y="140" text-anchor="middle" font-size="12" font-weight="700" fill="#b45309">Female (n)</text>
      </g>

      
      <g id="zygoteGroup" opacity="0" transform="matrix(0.5 0 0 0.5 95 42.5)" style="transition: all 0.6s cubic-bezier(0.34, 1.3, 0.64, 1);">
        <circle cx="190" cy="80" r="50" fill="#f8fafc" stroke="#64748b" stroke-width="3" stroke-dasharray="4 2" />
        
        <circle cx="190" cy="80" r="28" fill="url(#mixedStripes)" stroke="#1e2945" stroke-width="2.5" />
        <text x="190" y="146" text-anchor="middle" font-size="13" font-weight="800" fill="#1e2945">Unique Offspring (2n)</text>
      </g>
    </svg>
  </div>

  
  <div class="badges-grid">
    <div class="badge-item">
      <span class="badge-label">⏱️ Speed</span>
      <span class="badge-val">Slower <span style="font-size:10.5px;font-weight:500;color:#64748b;">(Weeks to Years)</span></span>
    </div>
    <div class="badge-item">
      <span class="badge-label">⚡ Energy Cost</span>
      <span class="badge-val tag-yellow">High (Finding Mates)</span>
    </div>
    <div class="badge-item">
      <span class="badge-label">🧬 Genetics</span>
      <span class="badge-val tag-mixed">Unique Variation</span>
    </div>
  </div>

  
  <div class="play-bar">
    <button class="play-btn" id="togglePlayBtn" onclick="toggleAutoPlay()">
      <span id="playIcon">⏸</span> Auto-Playing
    </button>
    <span style="font-size: 11px; color: #94a3b8; font-weight: 500;">Sexual Reproduction</span>
  </div>

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

    const maleGroup = document.getElementById('maleGroup');
    const femaleGroup = document.getElementById('femaleGroup');
    const zygoteGroup = document.getElementById('zygoteGroup');
    const fusionSymbols = document.getElementById('fusionSymbols');
    const maleLabel = document.getElementById('maleLabel');
    const femaleLabel = document.getElementById('femaleLabel');

    function updateStepUI() {
      // Button states
      for (let i = 0; i < 3; i++) {
        const btn = document.getElementById(`btn${i}`);
        btn.classList.toggle('active', i === currentStep);
      }

      if (currentStep === 0) {
        // Separate Gametes
        maleGroup.style.transform = 'translate(0px, 0px) scale(1)';
        maleGroup.style.opacity = '1';
        femaleGroup.style.transform = 'translate(0px, 0px) scale(1)';
        femaleGroup.style.opacity = '1';
        maleLabel.style.opacity = '1';
        femaleLabel.style.opacity = '1';

        fusionSymbols.style.opacity = '0';
        zygoteGroup.style.opacity = '0';
        zygoteGroup.style.transform = 'matrix(0.5 0 0 0.5 95 42.5)';
      } else if (currentStep === 1) {
        // Joining / Fertilization
        maleGroup.style.transform = 'translate(45px, 0px) scale(0.95)';
        maleGroup.style.opacity = '1';
        femaleGroup.style.transform = 'translate(-45px, 0px) scale(0.95)';
        femaleGroup.style.opacity = '1';
        maleLabel.style.opacity = '1';
        femaleLabel.style.opacity = '1';

        fusionSymbols.style.opacity = '1';
        zygoteGroup.style.opacity = '0';
        zygoteGroup.style.transform = 'matrix(0.6 0 0 0.6 76 34)';
      } else if (currentStep === 2) {
        // Unique Mixed Offspring
        maleGroup.style.transform = 'translate(95px, 0px) scale(0.2)';
        maleGroup.style.opacity = '0';
        femaleGroup.style.transform = 'translate(-95px, 0px) scale(0.2)';
        femaleGroup.style.opacity = '0';
        maleLabel.style.opacity = '0';
        femaleLabel.style.opacity = '0';

        fusionSymbols.style.opacity = '0';
        zygoteGroup.style.opacity = '1';
        zygoteGroup.style.transform = 'matrix(1 0 0 1 0 0)';
      }
    }

    function setStep(stepIndex) {
      currentStep = stepIndex;
      updateStepUI();
    }

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

    function startTimer() {
      if (autoPlayTimer) clearInterval(autoPlayTimer);
      autoPlayTimer = setInterval(nextStep, 3200);
    }

    function toggleAutoPlay() {
      isPlaying = !isPlaying;
      const icon = document.getElementById('playIcon');
      const btn = document.getElementById('togglePlayBtn');

      if (isPlaying) {
        icon.textContent = '⏸';
        btn.childNodes[1].nodeValue = ' Auto-Playing';
        startTimer();
      } else {
        icon.textContent = '▶';
        btn.childNodes[1].nodeValue = ' Paused';
        clearInterval(autoPlayTimer);
      }
    }

    // Initialize
    updateStepUI();
    startTimer();
  </script>
</body>
</html>

Asexual vs. Sexual Reproduction Modes

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      background: #f8fafc;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-start;
      padding: 8px;
      user-select: none;
      overflow-x: hidden;
    }

    .stepper {
      display: flex;
      gap: 4px;
      background: #e2e8f0;
      padding: 3px;
      border-radius: 20px;
      margin-bottom: 8px;
      width: 100%;
      max-width: 480px;
      justify-content: center;
    }
    .step-btn {
      border: none;
      background: transparent;
      padding: 5px 10px;
      border-radius: 14px;
      font-size: 11px;
      font-weight: 700;
      color: #64748b;
      cursor: pointer;
      transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
      display: flex;
      align-items: center;
      gap: 4px;
      white-space: nowrap;
      flex: 1;
      justify-content: center;
    }
    .step-btn.active {
      background: #2563eb;
      color: #ffffff;
      box-shadow: 0 2px 4px rgba(37,99,235,0.25);
    }

    .comparison {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      width: 100%;
      max-width: 480px;
    }

    .panel {
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 10px;
      padding: 8px 6px;
      display: flex;
      flex-direction: column;
      align-items: center;
      position: relative;
      transition: border-color 0.3s ease, background-color 0.3s ease;
    }
    .panel.fail { border-color: #fca5a5; background: #fff5f5; }
    .panel.pass { border-color: #86efac; background: #f0fdf4; }

    .panel-header {
      text-align: center;
      width: 100%;
      margin-bottom: 4px;
    }
    .title {
      font-size: 12px;
      font-weight: 800;
      letter-spacing: -0.01em;
      line-height: 1.2;
    }
    .trait-badge {
      display: inline-block;
      font-size: 9.5px;
      font-weight: 700;
      padding: 1px 6px;
      border-radius: 4px;
      margin-top: 2px;
    }
    .badge-clone { background: #dcfce7; color: #166534; }
    .badge-diverse { background: #e0e7ff; color: #3730a3; }

    /* Threat banner placed cleanly between header and grid - no overlay */
    .threat-banner-container {
      height: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 2px 0;
      width: 100%;
    }
    .threat-banner {
      background: #dc2626;
      color: #fff;
      font-size: 10px;
      font-weight: 800;
      padding: 2px 8px;
      border-radius: 12px;
      box-shadow: 0 2px 6px rgba(220,38,38,0.25);
      opacity: 0;
      transform: scale(0.9);
      transition: opacity 0.25s ease, transform 0.25s ease;
      display: flex;
      align-items: center;
      gap: 3px;
    }
    .threat-banner.active {
      transform: scale(1);
      opacity: 1;
    }

    .grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 4px;
      margin: 4px 0;
      width: 100%;
      max-width: 160px;
      justify-items: center;
    }

    .bug-slot {
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
      width: 36px;
      height: 36px;
    }

    .bug {
      width: 32px;
      height: 32px;
      transition: opacity 0.3s ease, filter 0.3s ease;
    }

    .bug.dead {
      opacity: 0.2;
      filter: grayscale(100%);
    }
    .bug.survivor {
      filter: drop-shadow(0 0 4px rgba(22, 163, 74, 0.7));
    }

    .overlay-mark {
      position: absolute;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      opacity: 0;
      transition: opacity 0.3s ease;
      pointer-events: none;
    }
    .overlay-mark.visible { opacity: 1; }

    .footer-section {
      display: flex;
      flex-direction: column;
      align-items: center;
      width: 100%;
      margin-top: 4px;
    }

    .offspring-row {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
      opacity: 0;
      height: 18px;
      transition: opacity 0.3s ease;
      margin-bottom: 3px;
    }
    .offspring-row.visible {
      opacity: 1;
    }
    .mini-bug {
      width: 16px;
      height: 16px;
    }
    .offspring-label {
      font-size: 9px;
      font-weight: 700;
      color: #166534;
    }

    .outcome-tag {
      font-size: 10px;
      font-weight: 800;
      padding: 3px 6px;
      border-radius: 5px;
      text-align: center;
      width: 100%;
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    .outcome-tag.visible { opacity: 1; }
    .outcome-extinct { background: #fee2e2; color: #991b1b; }
    .outcome-adapted { background: #dcfce7; color: #166534; }

    /* Mobile stack for screens < 440px */
    @media (max-width: 440px) {
      .comparison {
        grid-template-columns: 1fr;
        gap: 6px;
      }
      .panel {
        padding: 6px 8px;
      }
      .grid {
        grid-template-columns: repeat(6, 1fr);
        max-width: 240px;
        gap: 4px;
      }
      .threat-banner-container {
        height: 18px;
        margin: 1px 0;
      }
    }
  </style>
</head>
<body>

  <div class="stepper">
    <button class="step-btn active" id="btn1" onclick="setStep(1)">1 · Normal</button>
    <button class="step-btn" id="btn2" onclick="setStep(2)">2 · Virus ⚡</button>
    <button class="step-btn" id="btn3" onclick="setStep(3)">3 · Outcome</button>
  </div>

  <div class="comparison">
    
    <div class="panel" id="panelLeft">
      <div class="panel-header">
        <div class="title">Asexual Clones</div>
        <span class="trait-badge badge-clone">Identical DNA</span>
      </div>

      <div class="threat-banner-container">
        <div class="threat-banner" id="threatL">☠️ Virus Strikes</div>
      </div>

      <div class="grid" id="gridLeft">
        
        <div class="bug-slot"><svg class="bug clone" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#10b981"/><circle cx="50" cy="25" r="15" fill="#059669"/><circle cx="43" cy="22" r="3" fill="#fff"/><circle cx="57" cy="22" r="3" fill="#fff"/><path d="M30 45 Q15 40 10 50 M30 60 Q12 65 10 75 M70 45 Q85 40 90 50 M70 60 Q88 65 90 75 M40 15 Q30 5 25 5 M60 15 Q70 5 75 5" stroke="#047857" stroke-width="4" fill="none" stroke-linecap="round"/></svg><div class="overlay-mark mark-l">❌</div></div>
        <div class="bug-slot"><svg class="bug clone" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#10b981"/><circle cx="50" cy="25" r="15" fill="#059669"/><circle cx="43" cy="22" r="3" fill="#fff"/><circle cx="57" cy="22" r="3" fill="#fff"/><path d="M30 45 Q15 40 10 50 M30 60 Q12 65 10 75 M70 45 Q85 40 90 50 M70 60 Q88 65 90 75 M40 15 Q30 5 25 5 M60 15 Q70 5 75 5" stroke="#047857" stroke-width="4" fill="none" stroke-linecap="round"/></svg><div class="overlay-mark mark-l">❌</div></div>
        <div class="bug-slot"><svg class="bug clone" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#10b981"/><circle cx="50" cy="25" r="15" fill="#059669"/><circle cx="43" cy="22" r="3" fill="#fff"/><circle cx="57" cy="22" r="3" fill="#fff"/><path d="M30 45 Q15 40 10 50 M30 60 Q12 65 10 75 M70 45 Q85 40 90 50 M70 60 Q88 65 90 75 M40 15 Q30 5 25 5 M60 15 Q70 5 75 5" stroke="#047857" stroke-width="4" fill="none" stroke-linecap="round"/></svg><div class="overlay-mark mark-l">❌</div></div>
        <div class="bug-slot"><svg class="bug clone" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#10b981"/><circle cx="50" cy="25" r="15" fill="#059669"/><circle cx="43" cy="22" r="3" fill="#fff"/><circle cx="57" cy="22" r="3" fill="#fff"/><path d="M30 45 Q15 40 10 50 M30 60 Q12 65 10 75 M70 45 Q85 40 90 50 M70 60 Q88 65 90 75 M40 15 Q30 5 25 5 M60 15 Q70 5 75 5" stroke="#047857" stroke-width="4" fill="none" stroke-linecap="round"/></svg><div class="overlay-mark mark-l">❌</div></div>
        <div class="bug-slot"><svg class="bug clone" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#10b981"/><circle cx="50" cy="25" r="15" fill="#059669"/><circle cx="43" cy="22" r="3" fill="#fff"/><circle cx="57" cy="22" r="3" fill="#fff"/><path d="M30 45 Q15 40 10 50 M30 60 Q12 65 10 75 M70 45 Q85 40 90 50 M70 60 Q88 65 90 75 M40 15 Q30 5 25 5 M60 15 Q70 5 75 5" stroke="#047857" stroke-width="4" fill="none" stroke-linecap="round"/></svg><div class="overlay-mark mark-l">❌</div></div>
        <div class="bug-slot"><svg class="bug clone" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#10b981"/><circle cx="50" cy="25" r="15" fill="#059669"/><circle cx="43" cy="22" r="3" fill="#fff"/><circle cx="57" cy="22" r="3" fill="#fff"/><path d="M30 45 Q15 40 10 50 M30 60 Q12 65 10 75 M70 45 Q85 40 90 50 M70 60 Q88 65 90 75 M40 15 Q30 5 25 5 M60 15 Q70 5 75 5" stroke="#047857" stroke-width="4" fill="none" stroke-linecap="round"/></svg><div class="overlay-mark mark-l">❌</div></div>
      </div>

      <div class="footer-section">
        <div class="offspring-row"></div>
        <div class="outcome-tag outcome-extinct" id="outL">100% Wiped Out (Extinct)</div>
      </div>
    </div>

    
    <div class="panel" id="panelRight">
      <div class="panel-header">
        <div class="title">Sexual Population</div>
        <span class="trait-badge badge-diverse">Varied DNA</span>
      </div>

      <div class="threat-banner-container">
        <div class="threat-banner" id="threatR">☠️ Virus Strikes</div>
      </div>

      <div class="grid" id="gridRight">
        
        
        <div class="bug-slot"><svg class="bug diverse vuln" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#f97316"/><circle cx="50" cy="25" r="15" fill="#c2410c"/><circle cx="43" cy="22" r="3" fill="#fff"/><circle cx="57" cy="22" r="3" fill="#fff"/><path d="M30 45 Q15 40 10 50 M30 60 Q12 65 10 75 M70 45 Q85 40 90 50 M70 60 Q88 65 90 75 M40 15 Q30 5 25 5 M60 15 Q70 5 75 5" stroke="#9a3412" stroke-width="4" fill="none" stroke-linecap="round"/></svg><div class="overlay-mark mark-r">❌</div></div>
        
        <div class="bug-slot"><svg class="bug diverse res" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#78350f"/><circle cx="50" cy="25" r="15" fill="#451a03"/><circle cx="43" cy="22" r="3" fill="#fff"/><circle cx="57" cy="22" r="3" fill="#fff"/><path d="M30 45 Q15 40 10 50 M30 60 Q12 65 10 75 M70 45 Q85 40 90 50 M70 60 Q88 65 90 75 M40 15 Q30 5 25 5 M60 15 Q70 5 75 5" stroke="#451a03" stroke-width="4" fill="none" stroke-linecap="round"/></svg><div class="overlay-mark mark-r-surv">✨</div></div>
        
        <div class="bug-slot"><svg class="bug diverse vuln" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#06b6d4"/><circle cx="50" cy="25" r="15" fill="#0e7490"/><circle cx="43" cy="22" r="3" fill="#fff"/><circle cx="57" cy="22" r="3" fill="#fff"/><path d="M30 45 Q15 40 10 50 M30 60 Q12 65 10 75 M70 45 Q85 40 90 50 M70 60 Q88 65 90 75 M40 15 Q30 5 25 5 M60 15 Q70 5 75 5" stroke="#155e75" stroke-width="4" fill="none" stroke-linecap="round"/></svg><div class="overlay-mark mark-r">❌</div></div>
        
        <div class="bug-slot"><svg class="bug diverse vuln" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#8b5cf6"/><circle cx="50" cy="25" r="15" fill="#6d28d9"/><circle cx="43" cy="22" r="3" fill="#fff"/><circle cx="57" cy="22" r="3" fill="#fff"/><path d="M30 45 Q15 40 10 50 M30 60 Q12 65 10 75 M70 45 Q85 40 90 50 M70 60 Q88 65 90 75 M40 15 Q30 5 25 5 M60 15 Q70 5 75 5" stroke="#4c1d95" stroke-width="4" fill="none" stroke-linecap="round"/></svg><div class="overlay-mark mark-r">❌</div></div>
        
        <div class="bug-slot"><svg class="bug diverse res" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#eab308"/><circle cx="50" cy="25" r="15" fill="#a16207"/><circle cx="43" cy="22" r="3" fill="#fff"/><circle cx="57" cy="22" r="3" fill="#fff"/><circle cx="42" cy="50" r="4" fill="#713f12"/><circle cx="58" cy="52" r="4" fill="#713f12"/><circle cx="50" cy="68" r="4" fill="#713f12"/><path d="M30 45 Q15 40 10 50 M30 60 Q12 65 10 75 M70 45 Q85 40 90 50 M70 60 Q88 65 90 75 M40 15 Q30 5 25 5 M60 15 Q70 5 75 5" stroke="#713f12" stroke-width="4" fill="none" stroke-linecap="round"/></svg><div class="overlay-mark mark-r-surv">✨</div></div>
        
        <div class="bug-slot"><svg class="bug diverse vuln" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#3b82f6"/><circle cx="50" cy="25" r="15" fill="#1d4ed8"/><circle cx="43" cy="22" r="3" fill="#fff"/><circle cx="57" cy="22" r="3" fill="#fff"/><path d="M30 45 Q15 40 10 50 M30 60 Q12 65 10 75 M70 45 Q85 40 90 50 M70 60 Q88 65 90 75 M40 15 Q30 5 25 5 M60 15 Q70 5 75 5" stroke="#1e40af" stroke-width="4" fill="none" stroke-linecap="round"/></svg><div class="overlay-mark mark-r">❌</div></div>
      </div>

      <div class="footer-section">
        <div class="offspring-row" id="offspring">
          <span class="offspring-label">Offspring:</span>
          <svg class="mini-bug" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#78350f"/><circle cx="50" cy="25" r="15" fill="#451a03"/></svg>
          <svg class="mini-bug" viewBox="0 0 100 100"><circle cx="50" cy="55" r="30" fill="#eab308"/><circle cx="50" cy="25" r="15" fill="#a16207"/><circle cx="45" cy="52" r="3" fill="#713f12"/></svg>
        </div>
        <div class="outcome-tag outcome-adapted" id="outR">2 Survived &amp; Reproduce</div>
      </div>
    </div>
  </div>

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</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Asexual Reproduction: Binary Fission</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 {
      background: transparent;
      color: #1e2945;
      padding: 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
      user-select: none;
    }

    .main-wrap {
      width: 100%;
      max-width: 480px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    /* Controls / Stepper tabs */
    .steps-nav {
      display: flex;
      gap: 6px;
      background: #e2e8f0;
      padding: 4px;
      border-radius: 10px;
    }

    .step-btn {
      flex: 1;
      border: none;
      background: transparent;
      padding: 8px 4px;
      font-size: 12px;
      font-weight: 700;
      color: #334155;
      border-radius: 7px;
      cursor: pointer;
      transition: background-color 0.4s ease, color 0.4s ease, box-shadow 0.4s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
    }

    .step-btn.active {
      background: #ffffff;
      color: #0369a1;
      box-shadow: 0 2px 4px rgba(15, 23, 42, 0.12);
    }

    /* Stage Viewer */
    .stage-container {
      position: relative;
      width: 100%;
      height: 230px;
      background: #f8fafc;
      border: 1.5px solid #cbd5e1;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .stage-view {
      position: absolute;
      inset: 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.5s ease-in-out, transform 0.5s ease-in-out;
      transform: scale(0.94);
      padding: 10px;
    }

    .stage-view.active {
      opacity: 1;
      pointer-events: auto;
      transform: scale(1);
    }

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

    /* Cell styling - Larger visual scale to fill container */
    .cell {
      background: radial-gradient(circle at 35% 35%, #f0f9ff 0%, #bae6fd 70%, #7dd3fc 100%);
      border: 3.5px solid #0284c7;
      box-shadow: 0 6px 18px rgba(2, 132, 199, 0.22);
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .cell-parent {
      width: 155px;
      height: 155px;
      border-radius: 50%;
      animation: gentlePulse 4s ease-in-out infinite;
    }

    @keyframes gentlePulse {
      0%, 100% { border-radius: 50% 50% 50% 50%; }
      50% { border-radius: 53% 47% 52% 48% / 48% 53% 47% 52%; }
    }

    .cell-elongated {
      width: 270px;
      height: 140px;
      border-radius: 70px;
      background: radial-gradient(ellipse at center, #f0f9ff 0%, #bae6fd 65%, #7dd3fc 100%);
      display: flex;
      flex-direction: row;
      justify-content: space-around;
      align-items: center;
      padding: 0 16px;
      border: 3.5px solid #0284c7;
      box-shadow: 0 6px 18px rgba(2, 132, 199, 0.22);
      position: relative;
    }

    /* Pinch effect for cytokinesis / division */
    .cell-elongated::before {
      content: '';
      position: absolute;
      top: -3.5px;
      bottom: -3.5px;
      left: 50%;
      transform: translateX(-50%);
      width: 20px;
      background: #f8fafc;
      border-radius: 50%;
      box-shadow: inset 0 0 0 3px #0284c7;
      z-index: 1;
      opacity: 0.85;
    }

    .cell-daughter {
      width: 125px;
      height: 125px;
      border-radius: 50%;
      animation: gentlePulse 4s ease-in-out infinite reverse;
    }

    .dna-cluster {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 6px;
      z-index: 2;
    }

    .dna-ring {
      width: 52px;
      height: 52px;
      border: 4px dashed #0369a1;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.55);
      animation: rotateDNA 16s linear infinite;
    }

    .dna-ring.sm {
      width: 44px;
      height: 44px;
      border-width: 3.5px;
    }

    @keyframes rotateDNA {
      from { transform: rotate(0deg); }
      to { transform: rotate(360deg); }
    }

    /* High contrast tags */
    .dna-tag {
      font-size: 11px;
      font-weight: 800;
      color: #0c4a6e;
      background: #e0f2fe;
      border: 1px solid #7dd3fc;
      padding: 3px 8px;
      border-radius: 6px;
      white-space: nowrap;
      letter-spacing: 0.2px;
    }

    .split-arrow {
      color: #0284c7;
      font-size: 22px;
      font-weight: 900;
      line-height: 1;
      z-index: 2;
    }

    /* Stage description label */
    .stage-title {
      position: absolute;
      top: 8px;
      left: 12px;
      font-size: 11px;
      font-weight: 700;
      color: #1e2945;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      background: #e2e8f0;
      padding: 2px 8px;
      border-radius: 4px;
    }

    /* Badges Grid with High Contrast */
    .meters-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 6px;
    }

    .meter-card {
      background: #f1f5f9;
      border: 1.5px solid #cbd5e1;
      border-radius: 10px;
      padding: 8px 4px;
      text-align: center;
      display: flex;
      flex-direction: column;
      justify-content: center;
      gap: 3px;
      min-height: 58px;
    }

    .meter-label {
      font-size: 11px;
      font-weight: 800;
      color: #334155;
      text-transform: uppercase;
      letter-spacing: 0.3px;
    }

    .meter-val {
      font-size: 12px;
      font-weight: 800;
      color: #0f172a;
      line-height: 1.2;
    }

    .meter-val.highlight {
      color: #0369a1;
    }

    @media (max-width: 380px) {
      .step-btn {
        font-size: 11px;
        padding: 6px 2px;
      }
      .cell-parent {
        width: 140px;
        height: 140px;
      }
      .cell-elongated {
        width: 240px;
        height: 125px;
      }
      .cell-daughter {
        width: 108px;
        height: 108px;
      }
      .dna-ring {
        width: 44px;
        height: 44px;
      }
      .dna-ring.sm {
        width: 36px;
        height: 36px;
      }
      .meter-val {
        font-size: 11px;
      }
    }
  </style>
</head>
<body>
  <div class="main-wrap">
    
    <div class="steps-nav" role="tablist" aria-label="Binary Fission Stages">
      <button class="step-btn active" onclick="setStep(0)" role="tab" aria-selected="true">1. Parent Cell</button>
      <button class="step-btn" onclick="setStep(1)" role="tab" aria-selected="false">2. Duplicate DNA</button>
      <button class="step-btn" onclick="setStep(2)" role="tab" aria-selected="false">3. Split Clones</button>
    </div>

    
    <div class="stage-container">
      
      <div class="stage-view active" id="stage0">
        <span class="stage-title">Step 1: Single Parent</span>
        <div class="cells-row">
          <div class="cell cell-parent">
            <div class="dna-cluster">
              <div class="dna-ring" title="Original DNA Ring"></div>
              <span class="dna-tag">100% Blue DNA</span>
            </div>
          </div>
        </div>
      </div>

      
      <div class="stage-view" id="stage1">
        <span class="stage-title">Step 2: Replication & Elongation</span>
        <div class="cells-row">
          <div class="cell cell-elongated">
            <div class="dna-cluster">
              <div class="dna-ring sm"></div>
              <span class="dna-tag">Exact Copy 1</span>
            </div>
            <div class="dna-cluster">
              <div class="dna-ring sm"></div>
              <span class="dna-tag">Exact Copy 2</span>
            </div>
          </div>
        </div>
      </div>

      
      <div class="stage-view" id="stage2">
        <span class="stage-title">Step 3: Two Daughter Cells</span>
        <div class="cells-row">
          <div class="cell cell-daughter">
            <div class="dna-cluster">
              <div class="dna-ring sm"></div>
              <span class="dna-tag">100% Blue Clone</span>
            </div>
          </div>
          <div class="split-arrow">➔</div>
          <div class="cell cell-daughter">
            <div class="dna-cluster">
              <div class="dna-ring sm"></div>
              <span class="dna-tag">100% Blue Clone</span>
            </div>
          </div>
        </div>
      </div>
    </div>

    
    <div class="meters-grid">
      <div class="meter-card">
        <span class="meter-label">Speed</span>
        <span class="meter-val highlight">Very Fast<br><span style="font-size: 10px; font-weight: 700; color: #334155;">(Minutes/Hours)</span></span>
      </div>
      <div class="meter-card">
        <span class="meter-label">Energy Cost</span>
        <span class="meter-val">Low</span>
      </div>
      <div class="meter-card">
        <span class="meter-label">Genetic Outcome</span>
        <span class="meter-val highlight">100% Identical<br><span style="font-size: 10px; font-weight: 700; color: #334155;">Clones</span></span>
      </div>
    </div>
  </div>

  <script>
    let currentStep = 0;
    const totalSteps = 3;
    let timer = null;

    function setStep(idx) {
      currentStep = idx;
      document.querySelectorAll('.step-btn').forEach((btn, i) => {
        const isActive = (i === idx);
        btn.classList.toggle('active', isActive);
        btn.setAttribute('aria-selected', isActive);
      });
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        view.classList.toggle('active', i === idx);
      });
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    function resetTimer() {
      if (timer) clearInterval(timer);
      timer = setInterval(() => {
        setStep((currentStep + 1) % totalSteps);
      }, 4500);
    }

    resetTimer();
  </script>
</body>
</html>

OGS.7.LS.5

Aligned learning resources

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