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

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: transparent;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
      padding: 6px 10px;
    }

    .diagram {
      width: 100%;
      max-width: 600px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

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

    /* Open, frameless columns */
    .column {
      background: transparent;
      border: none;
      box-shadow: none;
      padding: 4px 2px;
      display: flex;
      flex-direction: column;
      align-items: center;
      cursor: pointer;
      border-radius: 8px;
      transition: background-color 0.2s ease;
    }

    .column:focus-visible {
      outline: 2px solid #0284c7;
    }

    .badge {
      font-size: 13px;
      font-weight: 700;
      padding: 5px 12px;
      border-radius: 20px;
      margin-bottom: 6px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      letter-spacing: -0.2px;
      transition: filter 0.2s ease, opacity 0.2s ease;
    }

    .badge-teal {
      background: #e0f2fe;
      color: #0369a1;
      border: 1px solid #bae6fd;
    }

    .badge-amber {
      background: #fef3c7;
      color: #b45309;
      border: 1px solid #fde68a;
    }

    .column:not(.active) {
      opacity: 0.65;
    }

    .column.active,
    .column:hover {
      opacity: 1;
    }

    .svg-stage {
      width: 100%;
      height: 135px;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
    }

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

    .flow-arrow {
      font-size: 13px;
      font-weight: 700;
      color: #94a3b8;
      margin: 3px 0;
      line-height: 1;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .gear-label {
      font-size: 11px;
      font-weight: 800;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      padding: 3px 8px;
      border-radius: 6px;
    }

    .duck .gear-label {
      background: #e0f2fe;
      color: #0284c7;
      border: 1px solid #bae6fd;
    }

    .eagle .gear-label {
      background: #fef3c7;
      color: #b45309;
      border: 1px solid #fde68a;
    }

    .outcome-box {
      width: 100%;
      text-align: center;
      padding: 6px 6px;
      border-radius: 8px;
      font-size: 11.5px;
      line-height: 1.35;
      font-weight: 600;
    }

    .duck .outcome-box {
      background: rgba(240, 249, 255, 0.85);
      border: 1px solid #bae6fd;
      color: #0369a1;
    }

    .eagle .outcome-box {
      background: rgba(255, 247, 237, 0.85);
      border: 1px solid #fed7aa;
      color: #c2410c;
    }

    /* SVG Webbing & Talon interactive styling */
    .web-skin {
      transition: fill 0.25s ease, filter 0.25s ease;
    }

    .column.active .web-skin,
    .column:hover .web-skin {
      filter: drop-shadow(0 0 4px rgba(2, 132, 199, 0.4));
    }

    .talon-claw {
      transition: stroke 0.25s ease, filter 0.25s ease;
    }

    .column.active .talon-claw,
    .column:hover .talon-claw {
      filter: drop-shadow(0 0 3px rgba(217, 119, 6, 0.5));
    }

    /* Thrust resistance animation (water pushed backward) */
    .thrust-arrow {
      transition: opacity 0.3s ease;
      opacity: 0.3;
    }

    .column.active .thrust-arrow,
    .column:hover .thrust-arrow {
      opacity: 1;
      animation: thrustPulse 1.2s ease-in-out infinite alternate;
    }

    @keyframes thrustPulse {
      0% { transform: translateY(0); }
      100% { transform: translateY(6px); }
    }

    .water-line {
      stroke-dasharray: 4, 4;
      animation: waterFlow 2.5s linear infinite;
    }

    @keyframes waterFlow {
      to { stroke-dashoffset: -16; }
    }

    /* Talon grip animation */
    .grip-arrow {
      transition: opacity 0.3s ease;
      opacity: 0.3;
    }

    .column.active .grip-arrow,
    .column:hover .grip-arrow {
      opacity: 1;
      animation: gripTighten 1.2s ease-in-out infinite alternate;
    }

    @keyframes gripTighten {
      0% { opacity: 0.6; }
      100% { opacity: 1; }
    }

    .hint {
      text-align: center;
      font-size: 11px;
      font-weight: 600;
      color: #64748b;
      margin-top: 2px;
      letter-spacing: -0.1px;
    }

    @media (max-width: 420px) {
      .diagram { gap: 6px; }
      .columns { gap: 8px; }
      .badge { font-size: 11.5px; padding: 4px 8px; margin-bottom: 4px; }
      .svg-stage { height: 120px; }
      .gear-label { font-size: 10px; padding: 2px 6px; }
      .flow-arrow { font-size: 11px; margin: 2px 0; }
      .outcome-box { font-size: 10.5px; padding: 5px 4px; }
      .hint { font-size: 10px; }
    }
  </style>
</head>
<body>

  <div class="diagram">
    <div class="columns">
      
      
      <div class="column duck active" id="duckCol" onclick="toggleDuck()" tabindex="0" role="button" aria-label="Duck Webbed Foot Adaptation">
        <div class="badge badge-teal">🦆 Webbed Foot</div>
        
        <div class="svg-stage">
          <svg viewBox="0 0 160 140" aria-hidden="true">
            <defs>
              <linearGradient id="duckWebGrad" x1="0" y1="0" x2="0" y2="1">
                <stop offset="0%" stop-color="#fdba74"/>
                <stop offset="100%" stop-color="#fb923c"/>
              </linearGradient>
            </defs>

            
            <path class="water-line" d="M 12,120 Q 45,115 80,120 T 148,120" fill="none" stroke="#38bdf8" stroke-width="2" opacity="0.6"/>
            <path class="water-line" d="M 20,130 Q 55,125 90,130 T 140,130" fill="none" stroke="#38bdf8" stroke-width="1.5" opacity="0.45"/>
            
            
            <g class="thrust-arrow">
              <path d="M 35,94 L 35,116 M 30,110 L 35,118 L 40,110" fill="none" stroke="#0284c7" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
              <path d="M 80,100 L 80,122 M 75,116 L 80,124 L 85,116" fill="none" stroke="#0284c7" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
              <path d="M 125,94 L 125,116 M 120,110 L 125,118 L 130,110" fill="none" stroke="#0284c7" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
              <text x="80" y="136" font-size="8.5" font-weight="bold" fill="#0369a1" text-anchor="middle">Water Pushed Backward</text>
            </g>

            
            <rect x="74" y="8" width="12" height="38" rx="6" fill="#ea580c"/>

            
            <path class="web-skin" d="M 80,44 L 28,88 Q 54,80 80,94 Q 106,80 132,88 Z" fill="url(#duckWebGrad)" stroke="#ea580c" stroke-width="1.5"/>

            
            
            <line x1="80" y1="44" x2="28" y2="88" stroke="#c2410c" stroke-width="5.5" stroke-linecap="round"/>
            <circle cx="27" cy="89" r="3" fill="#9a3412"/>
            
            
            <line x1="80" y1="44" x2="80" y2="94" stroke="#c2410c" stroke-width="5.5" stroke-linecap="round"/>
            <circle cx="80" cy="95" r="3" fill="#9a3412"/>

            
            <line x1="80" y1="44" x2="132" y2="88" stroke="#c2410c" stroke-width="5.5" stroke-linecap="round"/>
            <circle cx="133" cy="89" r="3" fill="#9a3412"/>
          </svg>
        </div>

        <div class="gear-label">Tool: Paddle</div>
        <div class="flow-arrow">↓</div>
        <div class="outcome-box">
          Pushes water backward for efficient swimming & thrust
        </div>
      </div>

      
      <div class="column eagle" id="eagleCol" onclick="toggleEagle()" tabindex="0" role="button" aria-label="Eagle Sharp Talons Adaptation">
        <div class="badge badge-amber">🦅 Sharp Talons</div>
        
        <div class="svg-stage">
          <svg viewBox="0 0 160 140" aria-hidden="true">
            
            <ellipse cx="80" cy="95" rx="54" ry="15" fill="#94a3b8" stroke="#64748b" stroke-width="2"/>
            <circle cx="45" cy="92" r="2.5" fill="#1e293b"/>
            <path d="M 124,95 L 140,86 L 140,104 Z" fill="#94a3b8" stroke="#64748b" stroke-width="1.5"/>
            
            <circle cx="95" cy="91" r="2" fill="#38bdf8" opacity="0.8"/>
            <circle cx="68" cy="98" r="1.5" fill="#38bdf8" opacity="0.8"/>

            
            <g class="grip-arrow">
              <path d="M 38,64 L 48,74 M 41,75 L 49,75 L 49,67" fill="none" stroke="#d97706" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
              <path d="M 122,64 L 112,74 M 119,75 L 111,75 L 111,67" fill="none" stroke="#d97706" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/>
              <text x="80" y="136" font-size="8.5" font-weight="bold" fill="#b45309" text-anchor="middle">Inward Clamping Grip</text>
            </g>

            
            <rect x="74" y="8" width="12" height="40" rx="6" fill="#f59e0b"/>
            <path d="M 68,8 Q 80,18 92,8 L 94,22 Q 80,26 66,22 Z" fill="#78350f"/>

            
            
            <path d="M 76,44 Q 50,54 42,80" fill="none" stroke="#f59e0b" stroke-width="6" stroke-linecap="round"/>
            <path class="talon-claw" d="M 42,80 Q 40,105 54,108" fill="none" stroke="#0f172a" stroke-width="5" stroke-linecap="round"/>

            
            <path d="M 80,46 Q 78,65 74,84" fill="none" stroke="#f59e0b" stroke-width="6" stroke-linecap="round"/>
            <path class="talon-claw" d="M 74,84 Q 72,110 84,112" fill="none" stroke="#0f172a" stroke-width="5" stroke-linecap="round"/>

            
            <path d="M 84,44 Q 110,54 118,80" fill="none" stroke="#f59e0b" stroke-width="6" stroke-linecap="round"/>
            <path class="talon-claw" d="M 118,80 Q 120,105 106,108" fill="none" stroke="#0f172a" stroke-width="5" stroke-linecap="round"/>
          </svg>
        </div>

        <div class="gear-label">Tool: Grapple Hook</div>
        <div class="flow-arrow">↓</div>
        <div class="outcome-box">
          Locks onto wet, slippery fish out of rushing rivers
        </div>
      </div>

    </div>

    <div class="hint">✦ Tap an adaptation to examine structure & function</div>
  </div>

  <script>
    const duck = document.getElementById('duckCol');
    const eagle = document.getElementById('eagleCol');

    function toggleDuck() {
      duck.classList.add('active');
      eagle.classList.remove('active');
    }

    function toggleEagle() {
      eagle.classList.add('active');
      duck.classList.remove('active');
    }

    duck.addEventListener('keydown', (e) => {
      if (e.key === 'Enter' || e.key === ' ') { toggleDuck(); e.preventDefault(); }
    });

    eagle.addEventListener('keydown', (e) => {
      if (e.key === 'Enter' || e.key === ' ') { toggleEagle(); e.preventDefault(); }
    });

    // Gentle auto-cycle every 3.5s until interaction
    let autoCycle = setInterval(() => {
      if (duck.classList.contains('active')) {
        toggleEagle();
      } else {
        toggleDuck();
      }
    }, 3500);

    [duck, eagle].forEach(el => {
      el.addEventListener('pointerdown', () => {
        clearInterval(autoCycle);
      });
    });
  </script>
</body>
</html>

What Is an Adaptation?

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    }

    body {
      background: transparent;
      color: #1e2945;
      padding: 10px;
    }

    .grid-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      width: 100%;
      max-width: 680px;
      margin: 0 auto;
    }

    @media (max-width: 440px) {
      .grid-container {
        grid-template-columns: 1fr;
        gap: 14px;
      }
    }

    .habitat-card {
      border-radius: 12px;
      padding: 14px 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      position: relative;
      transition: box-shadow 0.2s ease;
    }

    .desert-theme {
      background: #fff9eb;
      border: 1.5px solid #fde047;
    }

    .arctic-theme {
      background: #f0f9ff;
      border: 1.5px solid #bae6fd;
    }

    .header-badge {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      padding: 3px 10px;
      border-radius: 20px;
      margin-bottom: 8px;
    }

    .desert-badge {
      background: #fef08a;
      color: #854d0e;
    }

    .arctic-badge {
      background: #e0f2fe;
      color: #0369a1;
    }

    .animal-stage {
      font-size: 64px;
      line-height: 1;
      margin: 4px 0 10px 0;
      filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.08));
    }

    .callouts-list {
      display: flex;
      flex-direction: column;
      gap: 8px;
      width: 100%;
    }

    .callout-box {
      background: #ffffff;
      border-radius: 8px;
      padding: 8px 10px;
      border: 1px solid rgba(0, 0, 0, 0.06);
      display: flex;
      align-items: flex-start;
      gap: 8px;
    }

    .callout-icon {
      font-size: 18px;
      line-height: 1.2;
    }

    .callout-text {
      flex: 1;
    }

    .feature-title {
      font-size: 13px;
      font-weight: 700;
      color: #0f172a;
      line-height: 1.2;
    }

    .feature-purpose {
      font-size: 12px;
      color: #475569;
      margin-top: 2px;
      line-height: 1.25;
    }
  </style>
</head>
<body>

  <div class="grid-container">
    
    <div class="habitat-card desert-theme">
      <div class="header-badge desert-badge">🏜️ Hot Desert · Camel</div>
      <div class="animal-stage" aria-label="Camel">🐪</div>
      
      <div class="callouts-list">
        <div class="callout-box">
          <span class="callout-icon">👁️</span>
          <div class="callout-text">
            <div class="feature-title">Long eyelashes</div>
            <div class="feature-purpose">Blocks blowing sand</div>
          </div>
        </div>

        <div class="callout-box">
          <span class="callout-icon">🦶</span>
          <div class="callout-text">
            <div class="feature-title">Wide padded feet</div>
            <div class="feature-purpose">Spreads weight over sand</div>
          </div>
        </div>
      </div>
    </div>

    
    <div class="habitat-card arctic-theme">
      <div class="header-badge arctic-badge">❄️ Cold Arctic · Polar Bear</div>
      <div class="animal-stage" aria-label="Polar Bear">🐻‍❄️</div>
      
      <div class="callouts-list">
        <div class="callout-box">
          <span class="callout-icon">🧥</span>
          <div class="callout-text">
            <div class="feature-title">Fat layer & dense fur</div>
            <div class="feature-purpose">Traps body heat</div>
          </div>
        </div>

        <div class="callout-box">
          <span class="callout-icon">🐾</span>
          <div class="callout-text">
            <div class="feature-title">Gripping paw pads</div>
            <div class="feature-purpose">Prevents slipping on ice</div>
          </div>
        </div>
      </div>
    </div>
  </div>

</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <title>Habitat Conditions</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: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      min-height: 100%;
    }

    .grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      width: 100%;
    }

    .habitat-card {
      border-radius: 16px;
      padding: 16px 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
      border: 1px solid rgba(0, 0, 0, 0.06);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      cursor: pointer;
      user-select: none;
    }

    .habitat-card:active {
      transform: translateY(2px);
    }

    /* Card 1: Arctic Tundra */
    .card-tundra {
      background: linear-gradient(180deg, #e8f4fc 0%, #d2e9fa 100%);
      border-color: #bce0fd;
    }

    /* Card 2: Desert */
    .card-desert {
      background: linear-gradient(180deg, #fef5e7 0%, #fae5c7 100%);
      border-color: #f7d6a5;
    }

    /* Card 3: Freshwater Pond */
    .card-pond {
      background: linear-gradient(180deg, #eaf6ee 0%, #ceeada 100%);
      border-color: #b7e2c9;
    }

    .scene-art {
      width: 100%;
      height: 90px;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .scene-art svg {
      width: 100%;
      height: 100%;
      overflow: visible;
    }

    .title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
      color: #1e2945;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 13px;
      font-weight: 600;
      padding: 4px 8px;
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.8);
    }

    .card-tundra .tag {
      color: #0284c7;
    }

    .card-desert .tag {
      color: #d97706;
    }

    .card-pond .tag {
      color: #059669;
    }

    @media (max-width: 480px) {
      .grid {
        grid-template-columns: 1fr;
        gap: 10px;
      }
      .habitat-card {
        flex-direction: row;
        text-align: left;
        padding: 10px 14px;
        gap: 12px;
      }
      .scene-art {
        width: 70px;
        height: 60px;
        margin-bottom: 0;
        flex-shrink: 0;
      }
      .card-info {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
      }
      .title {
        font-size: 15px;
        margin-bottom: 4px;
      }
      .tag {
        font-size: 12px;
        padding: 2px 6px;
      }
    }
  </style>
</head>
<body>

  <div class="grid">
    
    <div class="habitat-card card-tundra">
      <div class="scene-art">
        <svg viewBox="0 0 120 90" fill="none" xmlns="http://www.w3.org/2000/svg">
          
          <polygon points="10,80 45,30 80,80" fill="#bcdff5" />
          <polygon points="45,30 55,46 45,50 35,46" fill="#ffffff" />
          <polygon points="50,80 85,20 120,80" fill="#9cd0f0" />
          <polygon points="85,20 96,38 85,42 74,38" fill="#ffffff" />
          
          <ellipse cx="60" cy="80" rx="55" ry="8" fill="#e0f2fe" />
          
          <g transform="translate(25, 20) scale(0.9)" stroke="#0284c7" stroke-width="2" stroke-linecap="round">
            <line x1="0" y1="-10" x2="0" y2="10" />
            <line x1="-10" y1="0" x2="10" y2="0" />
            <line x1="-7" y1="-7" x2="7" y2="7" />
            <line x1="-7" y1="7" x2="7" y2="-7" />
          </g>
        </svg>
      </div>
      <div class="card-info">
        <div class="title">Arctic Tundra</div>
        <div class="tag">❄️ Freezing & Snowy</div>
      </div>
    </div>

    
    <div class="habitat-card card-desert">
      <div class="scene-art">
        <svg viewBox="0 0 120 90" fill="none" xmlns="http://www.w3.org/2000/svg">
          
          <circle cx="95" cy="25" r="14" fill="#fbbf24" />
          <g stroke="#f59e0b" stroke-width="2" stroke-linecap="round">
            <line x1="95" y1="5" x2="95" y2="8" />
            <line x1="95" y1="42" x2="95" y2="45" />
            <line x1="75" y1="25" x2="78" y2="25" />
            <line x1="112" y1="25" x2="115" y2="25" />
          </g>
          
          <path d="M-10 80 Q 30 45, 80 80" fill="#fcd34d" />
          <path d="M40 80 Q 85 52, 130 80" fill="#f59e0b" />
          <path d="M0 85 Q 60 62, 120 85" fill="#fde68a" />
        </svg>
      </div>
      <div class="card-info">
        <div class="title">Desert</div>
        <div class="tag">☀️ Hot & Dry</div>
      </div>
    </div>

    
    <div class="habitat-card card-pond">
      <div class="scene-art">
        <svg viewBox="0 0 120 90" fill="none" xmlns="http://www.w3.org/2000/svg">
          
          <ellipse cx="60" cy="65" rx="55" ry="18" fill="#a7f3d0" />
          
          <ellipse cx="58" cy="65" rx="42" ry="12" fill="#6ee7b7" />
          
          <path d="M 45 65 A 14 7 0 1 1 65 67 L 55 65 Z" fill="#059669" />
          <circle cx="58" cy="62" r="3" fill="#fb7185" />
          
          <path d="M 82 72 Q 86 42 90 22" stroke="#047857" stroke-width="2.5" stroke-linecap="round" />
          <rect x="88" y="26" width="4" height="14" rx="2" fill="#78350f" />
          <path d="M 92 74 Q 98 48 104 32" stroke="#059669" stroke-width="2" stroke-linecap="round" />
          <path d="M 76 74 Q 74 54 70 38" stroke="#10b981" stroke-width="2" stroke-linecap="round" />
        </svg>
      </div>
      <div class="card-info">
        <div class="title">Freshwater Pond</div>
        <div class="tag">🌿 Wet & Shaded</div>
      </div>
    </div>
  </div>

</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      background: #f8fafc;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
      padding: 12px;
      user-select: none;
    }

    .controls {
      display: flex;
      gap: 8px;
      margin-bottom: 12px;
      z-index: 10;
    }

    .btn {
      padding: 6px 14px;
      font-size: 14px;
      font-weight: 600;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: #64748b;
      border-radius: 20px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: background-color 0.2s, color 0.2s, border-color 0.2s;
    }

    .btn.active {
      background: #0284c7;
      color: #ffffff;
      border-color: #0284c7;
    }

    .pyramid-wrap {
      width: 100%;
      max-width: 440px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      position: relative;
    }

    .apex-badge {
      background: #fef08a;
      border: 1.5px solid #eab308;
      color: #854d0e;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 12px;
      margin-bottom: 2px;
      display: flex;
      align-items: center;
      gap: 5px;
      animation: pulse 2.5s infinite ease-in-out;
    }

    @keyframes pulse {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-2px); }
    }

    .tier {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 16px;
      height: 48px;
      border-radius: 8px;
      color: #0f172a;
      font-weight: 600;
      font-size: 14px;
      transition: background-color 0.3s ease;
    }

    .tier-label {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .organism-name {
      font-size: 15px;
      font-weight: 700;
      transition: opacity 0.2s;
    }

    .role-tag {
      font-size: 12px;
      font-weight: 600;
      opacity: 0.85;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    /* Widths & Colors */
    .t4 { width: 55%; background: #fde047; border: 1.5px solid #eab308; }
    .t3 { width: 70%; background: #fed7aa; border: 1.5px solid #fb923c; }
    .t2 { width: 85%; background: #bae6fd; border: 1.5px solid #38bdf8; }
    .t1 { width: 100%; background: #bbf7d0; border: 1.5px solid #4ade80; }

    .fade-out {
      opacity: 0;
    }
  </style>
</head>
<body>

  <div class="controls">
    <button id="btn-savanna" class="btn active" onclick="setHabitat('savanna')">🌾 Savanna</button>
    <button id="btn-ocean" class="btn" onclick="setHabitat('ocean')">🌊 Ocean</button>
  </div>

  <div class="pyramid-wrap">
    <div class="apex-badge">
      👑 Top of Chain — No Natural Predators
    </div>

    
    <div class="tier t4">
      <div class="tier-label">
        <span id="org-4" class="organism-name">🦁 Lion</span>
      </div>
      <span class="role-tag">Apex</span>
    </div>

    
    <div class="tier t3">
      <div class="tier-label">
        <span id="org-3" class="organism-name">🐆 Cheetah</span>
      </div>
      <span class="role-tag">Carnivore</span>
    </div>

    
    <div class="tier t2">
      <div class="tier-label">
        <span id="org-2" class="organism-name">🦓 Zebra</span>
      </div>
      <span class="role-tag">Herbivore</span>
    </div>

    
    <div class="tier t1">
      <div class="tier-label">
        <span id="org-1" class="organism-name">🌱 Grass</span>
      </div>
      <span class="role-tag">Plant</span>
    </div>
  </div>

  <script>
    const data = {
      savanna: {
        t4: '🦁 Lion',
        t3: '🐆 Cheetah',
        t2: '🦓 Zebra',
        t1: '🌱 Grass'
      },
      ocean: {
        t4: '🐋 Orca',
        t3: '🐧 Penguin',
        t2: '🦐 Krill',
        t1: '🌿 Algae'
      }
    };

    function setHabitat(habitat) {
      document.getElementById('btn-savanna').classList.toggle('active', habitat === 'savanna');
      document.getElementById('btn-ocean').classList.toggle('active', habitat === 'ocean');

      const elements = [
        document.getElementById('org-4'),
        document.getElementById('org-3'),
        document.getElementById('org-2'),
        document.getElementById('org-1')
      ];

      elements.forEach(el => el.classList.add('fade-out'));

      setTimeout(() => {
        elements[0].textContent = data[habitat].t4;
        elements[1].textContent = data[habitat].t3;
        elements[2].textContent = data[habitat].t2;
        elements[3].textContent = data[habitat].t1;
        elements.forEach(el => el.classList.remove('fade-out'));
      }, 150);
    }
  </script>
</body>
</html>

Consumers: Animals That Eat Other Living Things

<!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;
      -webkit-tap-highlight-color: transparent;
    }

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

    .grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      width: 100%;
      max-width: 580px;
    }

    .animal-card {
      background: #ffffff;
      border: 2px solid #e2e8f0;
      border-radius: 12px;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      cursor: pointer;
      user-select: none;
      transition: border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
      position: relative;
      min-height: 160px;
      justify-content: space-between;
    }

    .animal-card:active {
      box-shadow: inset 0 2px 4px rgba(0,0,0,0.06);
    }

    .avatar {
      font-size: 38px;
      line-height: 1.1;
      margin-bottom: 4px;
    }

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

    .diet-box {
      background: #f8fafc;
      border-radius: 8px;
      padding: 6px 8px;
      margin: 6px 0;
      width: 100%;
      font-size: 13px;
      font-weight: 600;
      color: #475569;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
      border: 1px dashed #cbd5e1;
      min-height: 32px;
    }

    .badge {
      font-size: 11px;
      font-weight: 800;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      padding: 4px 8px;
      border-radius: 6px;
      width: 100%;
      opacity: 0.35;
      filter: grayscale(1);
      transition: all 0.25s ease;
      border: 1px solid transparent;
      background: #e2e8f0;
      color: #64748b;
    }

    /* Active Revealed States */
    .animal-card.active {
      border-color: #94a3b8;
      box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    }

    .animal-card.herbivore.active {
      border-color: #16a34a;
      background: #f0fdf4;
    }
    .animal-card.herbivore.active .badge {
      opacity: 1;
      filter: none;
      background: #dcfce7;
      color: #15803d;
      border-color: #86efac;
    }

    .animal-card.omnivore.active {
      border-color: #ea580c;
      background: #fff7ed;
    }
    .animal-card.omnivore.active .badge {
      opacity: 1;
      filter: none;
      background: #ffedd5;
      color: #c2410c;
      border-color: #fdba74;
    }

    .animal-card.carnivore.active {
      border-color: #dc2626;
      background: #fef2f2;
    }
    .animal-card.carnivore.active .badge {
      opacity: 1;
      filter: none;
      background: #fee2e2;
      color: #b91c1c;
      border-color: #fca5a5;
    }

    .animal-card.apex.active {
      border-color: #7c3aed;
      background: #faf5ff;
    }
    .animal-card.apex.active .badge {
      opacity: 1;
      filter: none;
      background: #f3e8ff;
      color: #6d28d9;
      border-color: #d8b4fe;
    }

    .prompt {
      font-size: 12px;
      color: #64748b;
      margin-top: 10px;
      font-weight: 500;
    }

    @media (max-width: 380px) {
      .avatar { font-size: 32px; }
      .name { font-size: 13px; }
      .diet-box { font-size: 11px; padding: 4px 6px; }
      .badge { font-size: 10px; padding: 3px 6px; }
    }
  </style>
</head>
<body>

  <div class="grid">
    
    <div class="animal-card herbivore active" onclick="toggleCard(this)">
      <div class="avatar">🦌</div>
      <div class="name">Deer</div>
      <div class="diet-box">🌿 Leaves & Twigs</div>
      <div class="badge">Herbivore</div>
    </div>

    
    <div class="animal-card omnivore active" onclick="toggleCard(this)">
      <div class="avatar">🦝</div>
      <div class="name">Raccoon</div>
      <div class="diet-box">🫐 Berries & 🐟 Fish</div>
      <div class="badge">Omnivore</div>
    </div>

    
    <div class="animal-card carnivore active" onclick="toggleCard(this)">
      <div class="avatar">🦅</div>
      <div class="name">Hawk</div>
      <div class="diet-box">🐁 Mice & 🐍 Snakes</div>
      <div class="badge">Carnivore</div>
    </div>

    
    <div class="animal-card apex active" onclick="toggleCard(this)">
      <div class="avatar">🐺</div>
      <div class="name">Wolf</div>
      <div class="diet-box">👑 Top Predator</div>
      <div class="badge">Apex Predator</div>
    </div>
  </div>

  <div class="prompt">Tap animal to stamp classification</div>

  <script>
    function toggleCard(card) {
      card.classList.toggle('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">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      background-color: #f0fdf4;
      color: #1e2945;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      padding: 16px 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
      user-select: none;
    }

    .toggle-bar {
      display: flex;
      gap: 8px;
      margin-bottom: 20px;
      background: #e2f7e9;
      padding: 4px;
      border-radius: 24px;
    }

    .toggle-btn {
      border: none;
      background: transparent;
      padding: 6px 16px;
      font-size: 14px;
      font-weight: 600;
      color: #166534;
      border-radius: 20px;
      cursor: pointer;
      transition: background-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
    }

    .toggle-btn.active {
      background: #22c55e;
      color: #ffffff;
      box-shadow: 0 2px 6px rgba(34, 197, 94, 0.3);
    }

    .chain-container {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      width: 100%;
      max-width: 600px;
    }

    .node {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      background: #ffffff;
      padding: 14px 8px;
      border-radius: 16px;
      border: 2px solid #bbf7d0;
      box-shadow: 0 4px 12px rgba(34, 197, 94, 0.08);
      position: relative;
      min-width: 90px;
    }

    .node-icon {
      font-size: 38px;
      line-height: 1;
      margin-bottom: 8px;
      transition: transform 0.3s ease;
    }

    .node-sun {
      border-color: #fef08a;
      background: #fffef5;
    }

    .node-title {
      font-size: 13px;
      font-weight: 700;
      color: #1e2945;
      line-height: 1.2;
    }

    .node-sub {
      font-size: 11px;
      font-weight: 500;
      color: #16a34a;
      margin-top: 3px;
      line-height: 1.1;
    }

    .arrow-connector {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      flex: 0 0 40px;
      position: relative;
    }

    .arrow-line-wrap {
      width: 100%;
      height: 14px;
      display: flex;
      align-items: center;
      position: relative;
    }

    .arrow-track {
      width: 100%;
      height: 4px;
      background: #bbf7d0;
      border-radius: 2px;
      position: relative;
      overflow: hidden;
    }

    .energy-pulse {
      position: absolute;
      top: 0;
      left: 0;
      height: 100%;
      width: 50%;
      background: linear-gradient(90deg, transparent, #22c55e, transparent);
      animation: flow 1.6s infinite linear;
    }

    .arrow-head {
      width: 0;
      height: 0;
      border-top: 5px solid transparent;
      border-bottom: 5px solid transparent;
      border-left: 7px solid #22c55e;
      margin-left: -2px;
    }

    .sun-rays {
      border-left-color: #eab308;
    }

    .sun-track {
      background: #fef08a;
    }

    .sun-pulse {
      background: linear-gradient(90deg, transparent, #eab308, transparent);
    }

    .flow-label {
      font-size: 10px;
      font-weight: 700;
      color: #15803d;
      margin-top: 4px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    @keyframes flow {
      0% { transform: translateX(-100%); }
      100% { transform: translateX(200%); }
    }

    @keyframes pulseGlow {
      0%, 100% { transform: scale(1); filter: drop-shadow(0 0 2px rgba(234, 179, 8, 0.4)); }
      50% { transform: scale(1.08); filter: drop-shadow(0 0 8px rgba(234, 179, 8, 0.8)); }
    }

    .sun-glow {
      display: inline-block;
      animation: pulseGlow 3s infinite ease-in-out;
    }

    @media (max-width: 420px) {
      .chain-container {
        gap: 4px;
      }
      .arrow-connector {
        flex: 0 0 28px;
      }
      .node {
        padding: 10px 4px;
        min-width: 80px;
      }
      .node-icon {
        font-size: 30px;
      }
      .node-title {
        font-size: 12px;
      }
      .node-sub {
        font-size: 10px;
      }
      .flow-label {
        font-size: 8px;
      }
    }
  </style>
</head>
<body>

  <div class="toggle-bar" role="tablist">
    <button class="toggle-btn active" id="btnLand" onclick="setHabitat('land')">🌿 Land</button>
    <button class="toggle-btn" id="btnOcean" onclick="setHabitat('ocean')">🌊 Ocean</button>
  </div>

  <div class="chain-container">
    
    <div class="node node-sun">
      <div class="node-icon sun-glow">☀️</div>
      <div class="node-title">Sun</div>
      <div class="node-sub">Light Energy</div>
    </div>

    
    <div class="arrow-connector">
      <div class="arrow-line-wrap">
        <div class="arrow-track sun-track">
          <div class="energy-pulse sun-pulse"></div>
        </div>
        <div class="arrow-head sun-rays"></div>
      </div>
      <span class="flow-label" style="color: #ca8a04;">Energy</span>
    </div>

    
    <div class="node">
      <div class="node-icon" id="producerIcon">🌱</div>
      <div class="node-title">Producer</div>
      <div class="node-sub">Makes Food</div>
    </div>

    
    <div class="arrow-connector">
      <div class="arrow-line-wrap">
        <div class="arrow-track">
          <div class="energy-pulse"></div>
        </div>
        <div class="arrow-head"></div>
      </div>
      <span class="flow-label">Energy</span>
    </div>

    
    <div class="node">
      <div class="node-icon" id="consumerIcon">🐇</div>
      <div class="node-title">Consumer</div>
      <div class="node-sub">Eats Food</div>
    </div>
  </div>

  <script>
    function setHabitat(type) {
      const btnLand = document.getElementById('btnLand');
      const btnOcean = document.getElementById('btnOcean');
      const producerIcon = document.getElementById('producerIcon');
      const consumerIcon = document.getElementById('consumerIcon');

      if (type === 'land') {
        btnLand.classList.add('active');
        btnOcean.classList.remove('active');
        producerIcon.textContent = '🌱';
        consumerIcon.textContent = '🐇';
      } else {
        btnOcean.classList.add('active');
        btnLand.classList.remove('active');
        producerIcon.textContent = '🌿';
        consumerIcon.textContent = '🐟';
      }
    }
  </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>Transpiration Comparison</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      width: 100%;
      background: #f8fafc;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      padding: 16px 12px;
      user-select: none;
      display: flex;
      justify-content: center;
      align-items: flex-start;
    }
    .comparison-container {
      width: 100%;
      max-width: 680px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    @media (max-width: 520px) {
      .comparison-container {
        grid-template-columns: 1fr;
        gap: 20px;
      }
    }
    .column {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
    }
    .title {
      font-size: 15px;
      font-weight: 700;
      color: #1e2945;
      text-align: center;
      letter-spacing: -0.1px;
    }
    .svg-wrapper {
      width: 100%;
      max-width: 320px;
      aspect-ratio: 4 / 3;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    svg {
      width: 100%;
      height: 100%;
      overflow: visible;
    }
    .badge {
      font-size: 12px;
      font-weight: 700;
      padding: 5px 12px;
      border-radius: 20px;
      letter-spacing: 0.2px;
      text-align: center;
    }
    .badge-high {
      background: #fee2e2;
      color: #b91c1c;
      border: 1px solid #fca5a5;
    }
    .badge-blocked {
      background: #dcfce7;
      color: #15803d;
      border: 1px solid #86efac;
    }

    /* Smooth vapor animation (>= 2s loop) */
    @keyframes riseVapor {
      0% {
        opacity: 0;
        transform: translateY(6px);
      }
      35% {
        opacity: 0.9;
      }
      80% {
        opacity: 0.7;
      }
      100% {
        opacity: 0;
        transform: translateY(-22px);
      }
    }
    .vapor-1 { animation: riseVapor 2.8s infinite ease-out; }
    .vapor-2 { animation: riseVapor 2.8s infinite ease-out 0.9s; }
    .vapor-3 { animation: riseVapor 2.8s infinite ease-out 1.8s; }

    /* Subtle trapped water droplet breathing */
    @keyframes waterSubtle {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-1.5px); }
    }
    .trapped-group {
      animation: waterSubtle 3s infinite ease-in-out;
    }

    /* Deflected sun rays animation */
    @keyframes rayGlow {
      0%, 100% { opacity: 0.8; stroke-dashoffset: 0; }
      50% { opacity: 1; stroke-dashoffset: -6; }
    }
    .heat-ray {
      stroke-dasharray: 5 3;
      animation: rayGlow 2.5s infinite linear;
    }
  </style>
</head>
<body>
  <div class="comparison-container">
    
    <div class="column">
      <div class="title">Standard Leaf</div>
      <div class="svg-wrapper">
        <svg viewBox="0 0 220 165" fill="none" xmlns="http://www.w3.org/2000/svg">
          
          <circle cx="110" cy="16" r="13" fill="#fef3c7"/>
          <circle cx="110" cy="16" r="7.5" fill="#f59e0b"/>
          <path d="M92 24 L101 40 M110 27 L110 43 M128 24 L119 40" stroke="#f59e0b" stroke-width="1.8" stroke-linecap="round" opacity="0.85"/>
          <text x="110" y="8" text-anchor="middle" font-size="9" font-weight="700" fill="#d97706">HEAT</text>

          
          <g class="vapor-1">
            <path d="M72 86 Q67 72 74 60 Q79 50 74 40" stroke="#0284c7" stroke-width="2.2" stroke-linecap="round" fill="none"/>
            <circle cx="74" cy="38" r="2.5" fill="#38bdf8"/>
          </g>
          <g class="vapor-2">
            <path d="M110 86 Q115 72 107 60 Q101 50 108 40" stroke="#0284c7" stroke-width="2.2" stroke-linecap="round" fill="none"/>
            <circle cx="108" cy="38" r="2.5" fill="#38bdf8"/>
          </g>
          <g class="vapor-3">
            <path d="M148 86 Q143 72 150 60 Q155 50 148 40" stroke="#0284c7" stroke-width="2.2" stroke-linecap="round" fill="none"/>
            <circle cx="148" cy="38" r="2.5" fill="#38bdf8"/>
          </g>

          
          <rect x="24" y="96" width="172" height="38" rx="6" fill="#86efac" stroke="#22c55e" stroke-width="2"/>
          <line x1="24" y1="96" x2="196" y2="96" stroke="#15803d" stroke-width="1.5" stroke-dasharray="4 3"/>

          
          <circle cx="72" cy="115" r="4.5" fill="#0284c7" opacity="0.8"/>
          <circle cx="110" cy="115" r="4.5" fill="#0284c7" opacity="0.8"/>
          <circle cx="148" cy="115" r="4.5" fill="#0284c7" opacity="0.8"/>
          
          
          <path d="M72 108 L72 90 M69 94 L72 88 L75 94" stroke="#0284c7" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
          <path d="M110 108 L110 90 M107 94 L110 88 L113 94" stroke="#0284c7" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
          <path d="M148 108 L148 90 M145 94 L148 88 L151 94" stroke="#0284c7" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>

          
          <text x="110" y="152" text-anchor="middle" font-size="11" font-weight="700" fill="#1e2945">Thin Skin (Porous)</text>
        </svg>
      </div>
      <div class="badge badge-high">Transpiration: High</div>
    </div>

    
    <div class="column">
      <div class="title">Cactus Stem</div>
      <div class="svg-wrapper">
        <svg viewBox="0 0 220 165" fill="none" xmlns="http://www.w3.org/2000/svg">
          
          <circle cx="110" cy="16" r="13" fill="#fef3c7"/>
          <circle cx="110" cy="16" r="7.5" fill="#f59e0b"/>
          <text x="110" y="8" text-anchor="middle" font-size="9" font-weight="700" fill="#d97706">HEAT</text>
          
          
          <g class="heat-ray">
            <path d="M74 24 L52 72 L34 46" stroke="#f59e0b" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round" fill="none"/>
            <path d="M146 24 L168 72 L186 46" stroke="#f59e0b" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round" fill="none"/>
          </g>
          <path d="M34 46 L34 52 M34 46 L40 46" stroke="#f59e0b" stroke-width="2" stroke-linecap="round"/>
          <path d="M186 46 L186 52 M186 46 L180 46" stroke="#f59e0b" stroke-width="2" stroke-linecap="round"/>

          
          <g>
            <rect x="66" y="44" width="88" height="18" rx="9" fill="#ffffff" stroke="#0284c7" stroke-width="1.5"/>
            <text x="110" y="57" text-anchor="middle" font-size="10.5" font-weight="700" fill="#0284c7">Waxy Cuticle</text>
          </g>

          
          <rect x="24" y="82" width="172" height="52" rx="6" fill="#15803d"/>
          <rect x="26" y="88" width="168" height="44" rx="4" fill="#16a34a"/>

          
          <rect x="22" y="74" width="176" height="12" rx="6" fill="#38bdf8" stroke="#0284c7" stroke-width="2"/>
          <rect x="32" y="77" width="156" height="3" rx="1.5" fill="#ffffff" opacity="0.9"/>

          
          <g class="trapped-group">
            <circle cx="56" cy="112" r="7" fill="#38bdf8" stroke="#0284c7" stroke-width="1.5"/>
            <circle cx="92" cy="106" r="7.5" fill="#38bdf8" stroke="#0284c7" stroke-width="1.5"/>
            <circle cx="128" cy="112" r="7.5" fill="#38bdf8" stroke="#0284c7" stroke-width="1.5"/>
            <circle cx="164" cy="106" r="7" fill="#38bdf8" stroke="#0284c7" stroke-width="1.5"/>
            
            
            <circle cx="54" cy="109" r="2" fill="#ffffff"/>
            <circle cx="90" cy="103" r="2.2" fill="#ffffff"/>
            <circle cx="126" cy="109" r="2.2" fill="#ffffff"/>
            <circle cx="162" cy="103" r="2" fill="#ffffff"/>
          </g>

          
          <path d="M92 98 L92 90 M92 90 L88 94 M92 90 L96 94" stroke="#38bdf8" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"/>
          <path d="M128 98 L128 90 M128 90 L124 94 M128 90 L132 94" stroke="#38bdf8" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"/>

          
          <text x="110" y="152" text-anchor="middle" font-size="11" font-weight="700" fill="#1e2945">Water Trapped</text>
        </svg>
      </div>
      <div class="badge badge-blocked">Transpiration: Blocked</div>
    </div>
  </div>
</body>
</html>

Cactus Adaptations: Spines, Succulent Stems, and Waxy Skins

<!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>Cactus Adaptations</title>
  <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: #fafaf9;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      height: 100vh;
      max-height: 520px;
      padding: 12px;
      user-select: none;
    }

    /* Tab Buttons */
    .tabs {
      display: flex;
      gap: 6px;
      width: 100%;
      max-width: 440px;
      justify-content: center;
    }
    .tab-btn {
      flex: 1;
      padding: 6px 4px;
      font-size: 13px;
      font-weight: 600;
      border: 1px solid #d6d3d1;
      border-radius: 8px;
      background: #ffffff;
      color: #57534e;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
      transition: background 0.2s, color 0.2s, box-shadow 0.2s;
    }
    .tab-btn.active {
      background: #0284c7;
      color: #ffffff;
      border-color: #0284c7;
      box-shadow: 0 2px 8px rgba(2, 132, 199, 0.25);
    }

    /* Diagram Stage */
    .stage-container {
      position: relative;
      width: 100%;
      max-width: 440px;
      flex: 1;
      min-height: 230px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    svg {
      width: 100%;
      height: 100%;
      overflow: visible;
    }

    /* Visual Highlighting States */
    .highlight-glow {
      transition: opacity 0.3s ease, stroke 0.3s ease, filter 0.3s ease;
    }
    .stem-flesh {
      transition: fill 0.3s ease, opacity 0.3s ease;
    }
    .cuticle-shine {
      transition: opacity 0.3s ease, stroke-width 0.3s ease;
    }
    .spine-set {
      transition: stroke 0.3s ease, stroke-width 0.3s ease;
    }

    /* Interactive Pin Hotspots */
    .hotspot {
      cursor: pointer;
      outline: none;
    }
    .hotspot circle.ring {
      animation: pulse 2s infinite ease-in-out;
      transform-origin: center;
    }
    @keyframes pulse {
      0%, 100% { transform: scale(1); opacity: 0.8; }
      50% { transform: scale(1.35); opacity: 0.2; }
    }
    .hotspot.active circle.core {
      fill: #0284c7;
    }
    .hotspot.active circle.ring {
      stroke: #0284c7;
    }

    /* Info Card */
    .card-box {
      width: 100%;
      max-width: 440px;
      min-height: 72px;
      background: #ffffff;
      border: 1px solid #e7e5e4;
      border-radius: 10px;
      padding: 10px 14px;
      box-shadow: 0 2px 6px rgba(0,0,0,0.04);
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .card-header {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 2px;
    }
    .card-text {
      font-size: 13px;
      line-height: 1.35;
      color: #475569;
    }
    .badge {
      font-size: 10px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      background: #e0f2fe;
      color: #0369a1;
      padding: 2px 6px;
      border-radius: 4px;
      font-weight: 700;
    }
  </style>
</head>
<body>

  
  <div class="tabs">
    <button class="tab-btn active" data-part="spines">🌵 Spines</button>
    <button class="tab-btn" data-part="cuticle">✨ Waxy Skin</button>
    <button class="tab-btn" data-part="stem">💧 Succulent Stem</button>
  </div>

  
  <div class="stage-container">
    <svg viewBox="0 0 400 250">
      <defs>
        
        <linearGradient id="skyGlow" x1="0" y1="0" x2="0" y2="1">
          <stop offset="0%" stop-color="#fef3c7" stop-opacity="0.6"/>
          <stop offset="100%" stop-color="#fafaf9" stop-opacity="0"/>
        </linearGradient>
        <linearGradient id="stemGrad" x1="0" y1="0" x2="1" y2="0">
          <stop offset="0%" stop-color="#15803d"/>
          <stop offset="35%" stop-color="#22c55e"/>
          <stop offset="70%" stop-color="#16a34a"/>
          <stop offset="100%" stop-color="#14532d"/>
        </linearGradient>
        <linearGradient id="innerWaterGrad" x1="0" y1="0" x2="0" y2="1">
          <stop offset="0%" stop-color="#38bdf8" stop-opacity="0.85"/>
          <stop offset="100%" stop-color="#0284c7" stop-opacity="0.95"/>
        </linearGradient>
        <linearGradient id="waxShine" x1="0" y1="0" x2="1" y2="0">
          <stop offset="0%" stop-color="#ffffff" stop-opacity="0.8"/>
          <stop offset="100%" stop-color="#ffffff" stop-opacity="0"/>
        </linearGradient>
      </defs>

      
      <circle cx="340" cy="45" r="28" fill="#fde047" opacity="0.65"/>
      <path d="M 30,225 Q 200,215 370,225 L 370,245 L 30,245 Z" fill="#e7e5e4"/>
      <ellipse cx="200" cy="225" rx="140" ry="10" fill="#d6d3d1" opacity="0.5"/>

      
      
      <path d="M 140,145 L 105,145 A 20,20 0 0 1 85,125 L 85,85 A 15,15 0 0 1 115,85 L 115,125 A 5,5 0 0 0 120,130 L 140,130" 
            fill="#16a34a" stroke="#14532d" stroke-width="2.5" stroke-linejoin="round"/>
      
      
      <path d="M 260,130 L 285,130 A 20,20 0 0 1 305,150 L 305,100 A 15,15 0 0 0 275,100 L 275,140 A 5,5 0 0 1 270,145 L 260,145" 
            fill="#16a34a" stroke="#14532d" stroke-width="2.5" stroke-linejoin="round"/>

      
      <rect id="stemBody" x="140" y="45" width="120" height="175" rx="40" 
            fill="url(#stemGrad)" stroke="#14532d" stroke-width="3"/>

      
      <g id="succulentLayer" class="stem-flesh" opacity="0.15">
        <rect x="155" y="60" width="90" height="145" rx="28" fill="url(#innerWaterGrad)"/>
        
        <path d="M 200,90 C 200,85 192,72 192,72 C 192,72 184,85 184,90 A 8,8 0 0 0 200,90 Z" fill="#ffffff" opacity="0.9"/>
        <path d="M 216,130 C 216,125 208,112 208,112 C 208,112 200,125 200,130 A 8,8 0 0 0 216,130 Z" fill="#ffffff" opacity="0.9"/>
        <path d="M 188,165 C 188,160 180,148 180,148 C 180,148 172,160 172,165 A 8,8 0 0 0 188,165 Z" fill="#ffffff" opacity="0.9"/>
      </g>

      
      <path d="M 165,58 L 165,218 M 188,48 L 188,220 M 212,48 L 212,220 M 235,58 L 235,218" 
            stroke="#15803d" stroke-width="2" stroke-dasharray="3,3" opacity="0.7"/>

      
      <g id="cuticleLayer" class="cuticle-shine" opacity="0.3">
        
        <rect x="145" y="48" width="18" height="165" rx="9" fill="url(#waxShine)"/>
        
        <rect id="cuticleOutline" x="138" y="43" width="124" height="179" rx="42" 
              fill="none" stroke="#38bdf8" stroke-width="0"/>
      </g>

      
      <g id="spinesLayer" class="spine-set" stroke="#fef08a" stroke-width="2" stroke-linecap="round">
        
        <path d="M 140,75 L 122,68 M 140,75 L 120,78 M 140,75 L 124,88"/>
        <path d="M 140,115 L 122,108 M 140,115 L 118,118 M 140,115 L 124,128"/>
        <path d="M 140,165 L 122,158 M 140,165 L 118,168 M 140,165 L 124,178"/>

        <path d="M 260,75 L 278,68 M 260,75 L 282,78 M 260,75 L 276,88"/>
        <path d="M 260,115 L 278,108 M 260,115 L 282,118 M 260,115 L 276,128"/>
        <path d="M 260,165 L 278,158 M 260,165 L 282,168 M 260,165 L 276,178"/>

        
        <path d="M 188,80 L 180,72 M 188,80 L 196,72 M 188,80 L 188,90" stroke="#fef9c3"/>
        <path d="M 212,120 L 204,112 M 212,120 L 220,112 M 212,120 L 212,130" stroke="#fef9c3"/>
        <path d="M 188,155 L 180,147 M 188,155 L 196,147 M 188,155 L 188,165" stroke="#fef9c3"/>
        <path d="M 212,185 L 204,177 M 212,185 L 220,177 M 212,185 L 212,195" stroke="#fef9c3"/>

        
        <path d="M 85,100 L 68,95 M 85,100 L 70,108"/>
        
        <path d="M 305,120 L 322,115 M 305,120 L 320,128"/>
      </g>

      
      <g id="hotspot-spines" class="hotspot active" data-part="spines" transform="translate(122, 75)">
        <circle class="ring" cx="0" cy="0" r="14" fill="none" stroke="#f59e0b" stroke-width="2"/>
        <circle class="core" cx="0" cy="0" r="8" fill="#f59e0b"/>
        <text x="0" y="3" text-anchor="middle" font-size="9" fill="#ffffff" font-weight="bold">1</text>
      </g>

      
      <g id="hotspot-cuticle" class="hotspot" data-part="cuticle" transform="translate(152, 135)">
        <circle class="ring" cx="0" cy="0" r="14" fill="none" stroke="#f59e0b" stroke-width="2"/>
        <circle class="core" cx="0" cy="0" r="8" fill="#f59e0b"/>
        <text x="0" y="3" text-anchor="middle" font-size="9" fill="#ffffff" font-weight="bold">2</text>
      </g>

      
      <g id="hotspot-stem" class="hotspot" data-part="stem" transform="translate(200, 140)">
        <circle class="ring" cx="0" cy="0" r="14" fill="none" stroke="#f59e0b" stroke-width="2"/>
        <circle class="core" cx="0" cy="0" r="8" fill="#f59e0b"/>
        <text x="0" y="3" text-anchor="middle" font-size="9" fill="#ffffff" font-weight="bold">3</text>
      </g>
    </svg>
  </div>

  
  <div class="card-box" id="infoCard">
    <div class="card-header">
      <span class="badge" id="partBadge">Defense & Shade</span>
      <span id="partTitle">1. Spines</span>
    </div>
    <div class="card-text" id="partDesc">
      Sharp thorns deter thirsty animals and cast mini-shadows that reduce sun exposure.
    </div>
  </div>

  <script>
    const data = {
      spines: {
        num: '1',
        title: 'Spines',
        badge: 'Defense & Shade',
        desc: 'Sharp thorns deter thirsty animals and cast mini-shadows that reduce sun exposure.'
      },
      cuticle: {
        num: '2',
        title: 'Waxy Cuticle',
        badge: 'Water Seal',
        desc: 'A glossy, waterproof wax layer coats the green skin to seal in moisture and prevent evaporation.'
      },
      stem: {
        num: '3',
        title: 'Succulent Stem',
        badge: 'Water Storage',
        desc: 'A thick, spongy green body stores liters of water and carries out vital photosynthesis.'
      }
    };

    const tabs = document.querySelectorAll('.tab-btn');
    const hotspots = document.querySelectorAll('.hotspot');
    const partBadge = document.getElementById('partBadge');
    const partTitle = document.getElementById('partTitle');
    const partDesc = document.getElementById('partDesc');

    const spinesLayer = document.getElementById('spinesLayer');
    const cuticleLayer = document.getElementById('cuticleLayer');
    const cuticleOutline = document.getElementById('cuticleOutline');
    const succulentLayer = document.getElementById('succulentLayer');

    function setActive(partKey) {
      // Update UI Tabs & Hotspots
      tabs.forEach(t => t.classList.toggle('active', t.dataset.part === partKey));
      hotspots.forEach(h => h.classList.toggle('active', h.dataset.part === partKey));

      // Update Info Content
      const item = data[partKey];
      partBadge.textContent = item.badge;
      partTitle.textContent = `${item.num}. ${item.title}`;
      partDesc.textContent = item.desc;

      // Update Visual SVG Adaptations
      if (partKey === 'spines') {
        spinesLayer.style.stroke = '#facc15';
        spinesLayer.style.strokeWidth = '3.5px';
        cuticleLayer.style.opacity = '0.2';
        cuticleOutline.style.strokeWidth = '0';
        succulentLayer.style.opacity = '0.15';
      } else if (partKey === 'cuticle') {
        spinesLayer.style.stroke = '#ca8a04';
        spinesLayer.style.strokeWidth = '1.8px';
        cuticleLayer.style.opacity = '1';
        cuticleOutline.style.strokeWidth = '5px';
        succulentLayer.style.opacity = '0.1';
      } else if (partKey === 'stem') {
        spinesLayer.style.stroke = '#ca8a04';
        spinesLayer.style.strokeWidth = '1.8px';
        cuticleLayer.style.opacity = '0.2';
        cuticleOutline.style.strokeWidth = '0';
        succulentLayer.style.opacity = '1';
      }
    }

    tabs.forEach(btn => {
      btn.addEventListener('click', () => setActive(btn.dataset.part));
    });

    hotspots.forEach(spot => {
      spot.addEventListener('click', () => setActive(spot.dataset.part));
    });

    // Initial state
    setActive('spines');
  </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>Cactus Stem Accordion Adaptation</title>
  <script src="{{VENDOR_CDN}}/gsap.min.js"></script>
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      width: 100%;
      height: 100%;
      background: #fbf8f3;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      user-select: none;
    }

    /* Controls */
    .controls {
      display: flex;
      background: #ece7de;
      padding: 4px;
      border-radius: 999px;
      gap: 4px;
      z-index: 10;
    }
    .toggle-btn {
      border: none;
      background: transparent;
      padding: 8px 16px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 600;
      color: #6b7280;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 6px;
      transition: all 0.25s ease;
    }
    .toggle-btn:hover {
      color: #1e2945;
    }
    .toggle-btn.active {
      background: #ffffff;
      color: #0d5c3a;
      box-shadow: 0 2px 6px rgba(0,0,0,0.08);
    }

    /* Diagram Stage */
    .stage {
      position: relative;
      width: 100%;
      max-width: 440px;
      height: 280px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    svg {
      width: 100%;
      height: 100%;
      overflow: visible;
    }

    /* Gauge */
    .gauge-card {
      position: absolute;
      right: 4px;
      top: 50%;
      transform: translateY(-50%);
      background: rgba(255,255,255,0.9);
      border: 1px solid #e2ddd3;
      border-radius: 12px;
      padding: 8px 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      width: 58px;
    }
    .gauge-track {
      width: 14px;
      height: 90px;
      background: #e5e0d5;
      border-radius: 8px;
      position: relative;
      overflow: hidden;
    }
    .gauge-fill {
      position: absolute;
      bottom: 0;
      width: 100%;
      height: 90%;
      background: linear-gradient(180deg, #38bdf8, #0284c7);
      border-radius: 8px;
      transition: height 0.6s ease, background 0.6s ease;
    }
    .gauge-label {
      font-size: 11px;
      font-weight: 700;
      color: #0284c7;
      transition: color 0.6s ease;
    }

    /* Labels */
    .lbl {
      font-size: 12px;
      font-weight: 600;
      fill: #4b5563;
    }
    .lbl-accent {
      fill: #0d5c3a;
      font-weight: 700;
    }

    /* Subtitle indicator */
    .state-indicator {
      font-size: 13px;
      font-weight: 600;
      color: #4b5563;
      display: flex;
      align-items: center;
      gap: 6px;
    }
  </style>
</head>
<body>

  
  <div class="controls" role="tablist">
    <button class="toggle-btn active" id="btnWet" role="tab" aria-selected="true">
      🌧️ Hydrated (Wet)
    </button>
    <button class="toggle-btn" id="btnDry" role="tab" aria-selected="false">
      ☀️ Dehydrated (Dry)
    </button>
  </div>

  
  <div class="stage">
    <svg viewBox="0 0 400 280">
      <defs>
        
        <radialGradient id="storageGradWet" cx="50%" cy="50%" r="50%">
          <stop offset="0%" stop-color="#bae6fd" />
          <stop offset="70%" stop-color="#7dd3fc" />
          <stop offset="100%" stop-color="#38bdf8" />
        </radialGradient>
        <radialGradient id="storageGradDry" cx="50%" cy="50%" r="50%">
          <stop offset="0%" stop-color="#fef08a" />
          <stop offset="70%" stop-color="#d9f99d" />
          <stop offset="100%" stop-color="#a3e635" />
        </radialGradient>
      </defs>

      
      <g id="cactusGroup">
        
        <path id="outerSkin" fill="#15803d" stroke="#166534" stroke-width="2" />
        
        
        <path id="innerCortex" fill="url(#storageGradWet)" opacity="0.95" />

        
        <g id="dropletsGroup" opacity="1">
          <circle cx="160" cy="115" r="3.5" fill="#ffffff" opacity="0.8"/>
          <circle cx="200" cy="115" r="3.5" fill="#ffffff" opacity="0.8"/>
          <circle cx="150" cy="150" r="3.5" fill="#ffffff" opacity="0.8"/>
          <circle cx="210" cy="150" r="3.5" fill="#ffffff" opacity="0.8"/>
          <circle cx="170" cy="175" r="3.5" fill="#ffffff" opacity="0.8"/>
          <circle cx="190" cy="175" r="3.5" fill="#ffffff" opacity="0.8"/>
        </g>

        
        <circle cx="180" cy="140" r="16" fill="#fef3c7" stroke="#ca8a04" stroke-width="2" />
        <circle cx="180" cy="140" r="6" fill="#d97706" />

        
        <g id="spinesGroup"></g>
      </g>

      
      <g id="annotations">
        
        <path d="M 180, 24 L 180, 8 M 180, 8 L 80, 8" fill="none" stroke="#9ca3af" stroke-width="1.5" stroke-dasharray="3,3"/>
        <circle cx="180" cy="24" r="3" fill="#15803d" />
        <text x="75" y="12" text-anchor="end" class="lbl lbl-accent">Pleated Ribs</text>

        
        <path d="M 230, 110 L 290, 60 M 290, 60 L 330, 60" fill="none" stroke="#9ca3af" stroke-width="1.5" stroke-dasharray="3,3"/>
        <circle cx="230" cy="110" r="3" fill="#0284c7" />
        <text x="335" y="64" class="lbl">Water Cortex</text>

        
        <path d="M 180, 156 L 180, 260 M 180, 260 L 80, 260" fill="none" stroke="#9ca3af" stroke-width="1.5" stroke-dasharray="3,3"/>
        <circle cx="180" cy="156" r="3" fill="#ca8a04" />
        <text x="75" y="264" text-anchor="end" class="lbl">Vascular Core</text>
      </g>
    </svg>

    
    <div class="gauge-card">
      <div class="gauge-track">
        <div class="gauge-fill" id="gaugeFill"></div>
      </div>
      <div class="gauge-label" id="gaugeText">90%</div>
    </div>
  </div>

  
  <div class="state-indicator" id="stateNote">
    <span>Swollen accordion ribs store water</span>
  </div>

  <script>
    const CX = 180;
    const CY = 140;
    const RIBS = 8;

    // States configuration
    const states = {
      wet: {
        rOuterTip: 116,
        rOuterValley: 94,
        rInnerTip: 104,
        rInnerValley: 82,
        fillColor: 'url(#storageGradWet)',
        gaugeHeight: '90%',
        gaugeColor: '#0284c7',
        gaugeBg: 'linear-gradient(180deg, #38bdf8, #0284c7)',
        gaugeText: '90%',
        dropletsOpacity: 1,
        note: 'Expanded pleats store maximum water'
      },
      dry: {
        rOuterTip: 92,
        rOuterValley: 46,
        rInnerTip: 80,
        rInnerValley: 36,
        fillColor: 'url(#storageGradDry)',
        gaugeHeight: '20%',
        gaugeColor: '#ca8a04',
        gaugeBg: 'linear-gradient(180deg, #facc15, #ca8a04)',
        gaugeText: '20%',
        dropletsOpacity: 0,
        note: 'Folded pleats reduce volume & surface area'
      }
    };

    let current = {
      rOuterTip: states.wet.rOuterTip,
      rOuterValley: states.wet.rOuterValley,
      rInnerTip: states.wet.rInnerTip,
      rInnerValley: states.wet.rInnerValley
    };

    // Generate smooth starburst path
    function generatePleatPath(rTip, rValley) {
      const points = [];
      const totalSteps = RIBS * 2;
      for (let i = 0; i < totalSteps; i++) {
        const angle = (i * Math.PI) / RIBS - Math.PI / 2;
        const r = (i % 2 === 0) ? rTip : rValley;
        points.push({
          x: CX + r * Math.cos(angle),
          y: CY + r * Math.sin(angle)
        });
      }

      // Create closed smooth cardinal curve
      let d = `M ${points[0].x},${points[0].y} `;
      for (let i = 0; i < points.length; i++) {
        const p0 = points[(i - 1 + points.length) % points.length];
        const p1 = points[i];
        const p2 = points[(i + 1) % points.length];
        const p3 = points[(i + 2) % points.length];

        const cp1x = p1.x + (p2.x - p0.x) / 5;
        const cp1y = p1.y + (p2.y - p0.y) / 5;
        const cp2x = p2.x - (p3.x - p1.x) / 5;
        const cp2y = p2.y - (p3.y - p1.y) / 5;

        d += `C ${cp1x},${cp1y} ${cp2x},${cp2y} ${p2.x},${p2.y} `;
      }
      return d + 'Z';
    }

    // Render spines at tip coordinates
    function updateSpines(rTip) {
      const g = document.getElementById('spinesGroup');
      g.innerHTML = '';
      for (let i = 0; i < RIBS; i++) {
        const angle = (i * 2 * Math.PI) / RIBS - Math.PI / 2;
        const bx = CX + rTip * Math.cos(angle);
        const by = CY + rTip * Math.sin(angle);

        // 3 radiating spines per cluster
        [-0.22, 0, 0.22].forEach(spread => {
          const spineAngle = angle + spread;
          const len = 14;
          const ex = bx + len * Math.cos(spineAngle);
          const ey = by + len * Math.sin(spineAngle);
          const line = document.createElementNS('http://www.w3.org/2000/svg', 'line');
          line.setAttribute('x1', bx);
          line.setAttribute('y1', by);
          line.setAttribute('x2', ex);
          line.setAttribute('y2', ey);
          line.setAttribute('stroke', '#78350f');
          line.setAttribute('stroke-width', '1.5');
          line.setAttribute('stroke-linecap', 'round');
          g.appendChild(line);
        });
      }
    }

    function renderShapes() {
      document.getElementById('outerSkin').setAttribute('d', generatePleatPath(current.rOuterTip, current.rOuterValley));
      document.getElementById('innerCortex').setAttribute('d', generatePleatPath(current.rInnerTip, current.rInnerValley));
      updateSpines(current.rOuterTip);
    }

    function setState(mode) {
      const target = states[mode];
      const isWet = mode === 'wet';

      document.getElementById('btnWet').classList.toggle('active', isWet);
      document.getElementById('btnDry').classList.toggle('active', !isWet);
      document.getElementById('btnWet').setAttribute('aria-selected', isWet);
      document.getElementById('btnDry').setAttribute('aria-selected', !isWet);

      // Morph geometry
      gsap.to(current, {
        rOuterTip: target.rOuterTip,
        rOuterValley: target.rOuterValley,
        rInnerTip: target.rInnerTip,
        rInnerValley: target.rInnerValley,
        duration: 0.6,
        ease: 'power2.out',
        onUpdate: renderShapes
      });

      // Cortex appearance & droplets
      document.getElementById('innerCortex').setAttribute('fill', target.fillColor);
      gsap.to('#dropletsGroup', { opacity: target.dropletsOpacity, duration: 0.5 });

      // Gauge update
      const gaugeFill = document.getElementById('gaugeFill');
      const gaugeText = document.getElementById('gaugeText');
      gaugeFill.style.height = target.gaugeHeight;
      gaugeFill.style.background = target.gaugeBg;
      gaugeText.textContent = target.gaugeText;
      gaugeText.style.color = target.gaugeColor;

      // Note text
      document.getElementById('stateNote').textContent = target.note;
    }

    // Event Listeners
    document.getElementById('btnWet').addEventListener('click', () => setState('wet'));
    document.getElementById('btnDry').addEventListener('click', () => setState('dry'));

    // Initial render
    renderShapes();
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      color: #1e2945;
      background: transparent;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
    }

    /* Tabs / Controls */
    .controls {
      display: flex;
      gap: 8px;
      width: 100%;
      max-width: 520px;
      margin-bottom: 12px;
    }
    .step-btn {
      flex: 1;
      padding: 8px 4px;
      font-size: 13px;
      font-weight: 600;
      border: 1px solid #e2e8f0;
      background: #f8f9fa;
      color: #64748b;
      border-radius: 8px;
      cursor: pointer;
      text-align: center;
      transition: all 0.25s ease;
    }
    .step-btn.active {
      background: #22b7ff;
      color: #ffffff;
      border-color: #22b7ff;
      box-shadow: 0 2px 6px rgba(34, 183, 255, 0.3);
    }

    /* Scene Container */
    .stage {
      position: relative;
      width: 100%;
      max-width: 520px;
      height: 250px;
      border-radius: 12px;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #333d42;
      box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.4);
      transition: background 0.6s ease;
    }

    /* Bark texture simulation */
    .bark-layer {
      position: absolute;
      inset: 0;
      background-image: repeating-linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.03) 0px,
        rgba(255, 255, 255, 0.03) 2px,
        transparent 2px,
        transparent 8px
      ), repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.15) 0px,
        rgba(0, 0, 0, 0.15) 6px,
        transparent 6px,
        transparent 14px
      );
      pointer-events: none;
    }

    /* Beetle elements */
    .beetle-grid {
      position: relative;
      width: 90%;
      height: 80%;
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      align-items: center;
      justify-items: center;
      z-index: 2;
    }

    .beetle-slot {
      position: relative;
      width: 48px;
      height: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .beetle {
      width: 36px;
      height: 44px;
      border-radius: 18px;
      position: relative;
      transition: transform 0.4s ease, opacity 0.4s ease, filter 0.4s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      box-shadow: 0 4px 8px rgba(0,0,0,0.25);
    }

    /* Beetle anatomy */
    .beetle::before {
      content: '';
      position: absolute;
      top: -4px;
      width: 14px;
      height: 10px;
      background: inherit;
      border-radius: 6px 6px 0 0;
      filter: brightness(0.85);
    }
    .beetle-line {
      width: 2px;
      height: 80%;
      background: rgba(0, 0, 0, 0.2);
      margin-top: 6px;
    }

    /* Beetle types */
    .beetle.light {
      background: #e2d9c8;
      border: 1px solid #c8beab;
    }
    .beetle.dark {
      background: #2b2625;
      border: 1px solid #1a1716;
    }
    .beetle.dark .beetle-line {
      background: rgba(255, 255, 255, 0.15);
    }

    /* Eaten state */
    .beetle.eaten {
      opacity: 0.15;
      transform: scale(0.65);
      filter: grayscale(1);
    }

    /* Predator indicator */
    .predator-badge {
      position: absolute;
      top: -12px;
      right: -8px;
      font-size: 16px;
      background: #ffffff;
      border-radius: 50%;
      width: 22px;
      height: 22px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 2px 5px rgba(0,0,0,0.2);
      opacity: 0;
      transform: translateY(4px);
      transition: all 0.3s ease;
    }
    .eaten + .predator-badge {
      opacity: 1;
      transform: translateY(0);
    }

    /* Status and Navigation bar */
    .footer {
      width: 100%;
      max-width: 520px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-top: 10px;
      padding: 0 4px;
    }

    .status-text {
      font-size: 14px;
      font-weight: 700;
      color: #1e2945;
    }

    .play-btn {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      border-radius: 20px;
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 6px;
      transition: background 0.2s;
    }
    .play-btn:active {
      background: #e2e8f0;
    }
  </style>
</head>
<body>

  <div class="controls">
    <button class="step-btn active" id="btn-0">Gen 1</button>
    <button class="step-btn" id="btn-1">Gen 2</button>
    <button class="step-btn" id="btn-2">Gen 3</button>
  </div>

  <div class="stage" id="stage">
    <div class="bark-layer"></div>
    <div class="beetle-grid" id="grid">
      
      <div class="beetle-slot"><div class="beetle" id="b0"><div class="beetle-line"></div></div><div class="predator-badge">🦅</div></div>
      <div class="beetle-slot"><div class="beetle" id="b1"><div class="beetle-line"></div></div><div class="predator-badge">🦅</div></div>
      <div class="beetle-slot"><div class="beetle" id="b2"><div class="beetle-line"></div></div><div class="predator-badge">🦅</div></div>
      <div class="beetle-slot"><div class="beetle" id="b3"><div class="beetle-line"></div></div><div class="predator-badge">🦅</div></div>
      <div class="beetle-slot"><div class="beetle" id="b4"><div class="beetle-line"></div></div><div class="predator-badge">🦅</div></div>
    </div>
  </div>

  <div class="footer">
    <div class="status-text" id="statusLabel">Generation 1: Change begins</div>
    <button class="play-btn" id="playBtn"><span>⏸</span> Pause</button>
  </div>

  <script>
    const steps = [
      {
        title: "Generation 1: Change begins",
        bark: "#3d3936",
        beetles: ["light eaten", "light eaten", "light eaten", "light", "dark"]
      },
      {
        title: "Generation 2: Useful traits survive",
        bark: "#2a2725",
        beetles: ["light eaten", "light", "dark", "dark", "dark"]
      },
      {
        title: "Generation 3: Population adapts",
        bark: "#1a1817",
        beetles: ["dark", "dark", "dark", "dark", "dark"]
      }
    ];

    let currentStep = 0;
    let timer = null;
    let isPlaying = true;

    const stage = document.getElementById('stage');
    const statusLabel = document.getElementById('statusLabel');
    const playBtn = document.getElementById('playBtn');
    const stepBtns = [
      document.getElementById('btn-0'),
      document.getElementById('btn-1'),
      document.getElementById('btn-2')
    ];

    function renderStep(idx) {
      currentStep = idx;
      const data = steps[idx];

      statusLabel.textContent = data.title;
      stage.style.background = data.bark;

      stepBtns.forEach((btn, i) => {
        btn.classList.toggle('active', i === idx);
      });

      data.beetles.forEach((cls, i) => {
        const el = document.getElementById('b' + i);
        el.className = 'beetle ' + cls;
      });
    }

    function nextStep() {
      renderStep((currentStep + 1) % steps.length);
    }

    function startAutoPlay() {
      if (timer) clearInterval(timer);
      timer = setInterval(nextStep, 3500);
      isPlaying = true;
      playBtn.innerHTML = '<span>⏸</span> Pause';
    }

    function stopAutoPlay() {
      if (timer) clearInterval(timer);
      isPlaying = false;
      playBtn.innerHTML = '<span>▶</span> Play';
    }

    stepBtns.forEach((btn, i) => {
      btn.addEventListener('click', () => {
        renderStep(i);
        stopAutoPlay();
      });
    });

    playBtn.addEventListener('click', () => {
      if (isPlaying) {
        stopAutoPlay();
      } else {
        nextStep();
        startAutoPlay();
      }
    });

    renderStep(0);
    startAutoPlay();
  </script>
</body>
</html>

science.ks3.y2.t3.s3

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