<!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>Identifying Common Wildflowers</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      background: transparent;
      color: #0f172a;
      width: 100%;
      padding: 12px 6px;
    }
    .guide-container {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      width: 100%;
      max-width: 720px;
      margin: 0 auto;
    }
    .plant-col {
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 4px 10px;
      position: relative;
    }
    .plant-col:not(:last-child)::after {
      content: "";
      position: absolute;
      right: 0;
      top: 10%;
      height: 80%;
      width: 1px;
      background: #e2e8f0;
    }
    .plant-title {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 6px;
      letter-spacing: -0.01em;
      text-align: center;
    }
    .svg-wrap {
      width: 100%;
      max-width: 170px;
      aspect-ratio: 1 / 1;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    svg {
      width: 100%;
      height: 100%;
      overflow: visible;
    }
    .badges {
      display: flex;
      flex-direction: column;
      gap: 6px;
      width: 100%;
      align-items: center;
      margin-top: 8px;
    }
    .badge {
      background: #f1f5f9;
      color: #334155;
      padding: 4px 8px;
      border-radius: 9999px;
      font-size: 11.5px;
      font-weight: 600;
      text-align: center;
      line-height: 1.25;
      border: 1px solid #e2e8f0;
      max-width: 100%;
      white-space: normal;
    }
    @media (max-width: 420px) {
      .plant-title {
        font-size: 13.5px;
      }
      .badge {
        font-size: 10px;
        padding: 3px 6px;
      }
      .plant-col {
        padding: 4px 4px;
      }
    }
  </style>
</head>
<body>

  <div class="guide-container">
    
    <div class="plant-col">
      <h2 class="plant-title">Dandelion</h2>
      <div class="svg-wrap">
        <svg viewBox="0 0 160 160" aria-label="Dandelion illustration">
          
          <path d="M 68 152 Q 78 146 88 152" stroke="#65a30d" stroke-width="2" fill="none" stroke-linecap="round"/>

          
          
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          <path d="M 72 148 Q 50 126 30 94" stroke="#4d7c0f" stroke-width="1.5" fill="none"/>

          
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          <path d="M 78 148 Q 98 128 118 98" stroke="#4d7c0f" stroke-width="1.5" fill="none"/>

          
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          <circle cx="112" cy="72" r="3" fill="#4d7c0f"/>

          
          <g opacity="0.85">
            
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            <line x1="112" y1="72" x2="92" y2="60" stroke="#cbd5e1" stroke-width="1"/>
            
            
            <circle cx="112" cy="72" r="22" fill="#f8fafc" fill-opacity="0.45" stroke="#e2e8f0" stroke-dasharray="2 2"/>
            <circle cx="112" cy="48" r="2.5" fill="#f8fafc" stroke="#94a3b8" stroke-width="0.75"/>
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            <circle cx="134" cy="76" r="2.5" fill="#f8fafc" stroke="#94a3b8" stroke-width="0.75"/>
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            <circle cx="100" cy="94" r="2.5" fill="#f8fafc" stroke="#94a3b8" stroke-width="0.75"/>
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            <circle cx="92" cy="60" r="2.5" fill="#f8fafc" stroke="#94a3b8" stroke-width="0.75"/>
          </g>

          
          <g>
            
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            <circle cx="136" cy="40" r="1" fill="#475569"/>
            <path d="M 127 26 Q 132 30 137 26 M 129 24 Q 132 30 135 24" stroke="#94a3b8" stroke-width="0.9" fill="none"/>

            
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            <circle cx="148" cy="24" r="1" fill="#475569"/>
            <path d="M 141 12 Q 145 16 149 12 M 143 10 Q 145 16 147 10" stroke="#94a3b8" stroke-width="0.9" fill="none"/>
          </g>

          
          <path d="M 74 148 Q 72 90 62 48" stroke="#84cc16" stroke-width="3.6" fill="none" stroke-linecap="round"/>
          <path d="M 73 148 Q 71 90 61 48" stroke="#4d7c0f" stroke-width="1" fill="none" opacity="0.4"/>

          
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          <g transform="translate(62, 38)">
            
            <ellipse cx="0" cy="0" rx="28" ry="12" fill="#eab308" transform="rotate(0)"/>
            <ellipse cx="0" cy="0" rx="28" ry="12" fill="#facc15" transform="rotate(20)"/>
            <ellipse cx="0" cy="0" rx="28" ry="12" fill="#eab308" transform="rotate(40)"/>
            <ellipse cx="0" cy="0" rx="28" ry="12" fill="#facc15" transform="rotate(60)"/>
            <ellipse cx="0" cy="0" rx="28" ry="12" fill="#eab308" transform="rotate(80)"/>
            <ellipse cx="0" cy="0" rx="28" ry="12" fill="#facc15" transform="rotate(100)"/>
            <ellipse cx="0" cy="0" rx="28" ry="12" fill="#eab308" transform="rotate(120)"/>
            <ellipse cx="0" cy="0" rx="28" ry="12" fill="#facc15" transform="rotate(140)"/>
            <ellipse cx="0" cy="0" rx="28" ry="12" fill="#eab308" transform="rotate(160)"/>

            
            <circle cx="0" cy="0" r="18" fill="#facc15"/>
            <circle cx="0" cy="0" r="14" fill="#eab308"/>
            <circle cx="0" cy="0" r="9" fill="#ca8a04"/>

            
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          </g>
        </svg>
      </div>
      <div class="badges">
        <span class="badge">Toothed basal leaves</span>
        <span class="badge">Fluffy seed clock</span>
      </div>
    </div>

    
    <div class="plant-col">
      <h2 class="plant-title">Daisy</h2>
      <div class="svg-wrap">
        <svg viewBox="0 0 160 160" aria-label="Daisy illustration">
          
          <path d="M 68 152 Q 80 148 92 152" stroke="#65a30d" stroke-width="2" fill="none" stroke-linecap="round"/>

          
          
          <path d="M 80 148 C 72 144 58 140 44 140 C 34 140 28 132 30 124 C 32 116 42 116 52 122 C 64 130 76 142 80 148 Z" fill="#4d7c0f"/>
          <path d="M 80 148 Q 50 134 32 124" stroke="#65a30d" stroke-width="1.2" fill="none"/>

          
          <path d="M 80 148 C 88 144 102 140 116 140 C 126 140 132 132 130 124 C 128 116 118 116 108 122 C 96 130 84 142 80 148 Z" fill="#65a30d"/>
          <path d="M 80 148 Q 110 134 128 124" stroke="#365314" stroke-width="1.2" fill="none"/>

          
          <path d="M 80 148 C 76 136 72 120 70 110 C 70 102 82 102 84 110 C 86 120 82 136 80 148 Z" fill="#4d7c0f" opacity="0.85"/>

          
          <path d="M 80 148 Q 79 100 80 62" stroke="#65a30d" stroke-width="3" fill="none" stroke-linecap="round"/>

          
          <g transform="translate(80, 56)">
            
            
            <g stroke="#cbd5e1" stroke-width="0.75">
              
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(20)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(40)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(60)"/>
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              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(100)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(120)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(140)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(160)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(180)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(200)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(220)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(240)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(260)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(280)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(300)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(320)"/>
              <path d="M -4 -8 C -6 -32 6 -32 4 -8 Z" fill="#f8fafc" transform="rotate(340)"/>
            </g>

            
            <circle cx="0" cy="-30" r="1.5" fill="#fda4af" opacity="0.8"/>
            <circle cx="28" cy="-10" r="1.5" fill="#fda4af" opacity="0.8"/>
            <circle cx="-28" cy="-10" r="1.5" fill="#fda4af" opacity="0.8"/>
            <circle cx="18" cy="24" r="1.5" fill="#fda4af" opacity="0.8"/>
            <circle cx="-18" cy="24" r="1.5" fill="#fda4af" opacity="0.8"/>

            
            <circle cx="0" cy="0" r="14" fill="#eab308" stroke="#ca8a04" stroke-width="1.5"/>
            <circle cx="0" cy="0" r="12" fill="#facc15"/>
            
            
            <g fill="#ca8a04" opacity="0.7">
              <circle cx="0" cy="0" r="1.2"/>
              <circle cx="-4" cy="-4" r="1.1"/>
              <circle cx="4" cy="-4" r="1.1"/>
              <circle cx="-4" cy="4" r="1.1"/>
              <circle cx="4" cy="4" r="1.1"/>
              <circle cx="0" cy="-7" r="1.1"/>
              <circle cx="0" cy="7" r="1.1"/>
              <circle cx="-7" cy="0" r="1.1"/>
              <circle cx="7" cy="0" r="1.1"/>
              <circle cx="-6" cy="-6" r="0.9"/>
              <circle cx="6" cy="-6" r="0.9"/>
              <circle cx="-6" cy="6" r="0.9"/>
              <circle cx="6" cy="6" r="0.9"/>
            </g>
          </g>
        </svg>
      </div>
      <div class="badges">
        <span class="badge">White ray petals</span>
        <span class="badge">Golden central disc</span>
      </div>
    </div>

    
    <div class="plant-col">
      <h2 class="plant-title">Buttercup</h2>
      <div class="svg-wrap">
        <svg viewBox="0 0 160 160" aria-label="Buttercup illustration">
          
          <path d="M 68 152 Q 80 148 92 152" stroke="#65a30d" stroke-width="2" fill="none" stroke-linecap="round"/>

          
          
          <g transform="translate(48, 126)">
            <path d="M 28 22 C 20 16 10 16 0 10 L 6 4 L -6 2 L 0 -8 L -12 -6 L -10 -18 C 2 -14 12 -4 28 22 Z" fill="#4d7c0f"/>
            <path d="M 28 22 Q 10 2 -10 -18" stroke="#65a30d" stroke-width="1.2" fill="none"/>
          </g>

          
          <g transform="translate(108, 126) scale(-1, 1)">
            <path d="M 28 22 C 20 16 10 16 0 10 L 6 4 L -6 2 L 0 -8 L -12 -6 L -10 -18 C 2 -14 12 -4 28 22 Z" fill="#65a30d"/>
            <path d="M 28 22 Q 10 2 -10 -18" stroke="#365314" stroke-width="1.2" fill="none"/>
          </g>

          
          <path d="M 76 148 Q 78 110 80 58" stroke="#65a30d" stroke-width="3" fill="none" stroke-linecap="round"/>
          
          <path d="M 78 102 Q 95 90 106 78" stroke="#65a30d" stroke-width="2" fill="none" stroke-linecap="round"/>
          <path d="M 106 78 C 104 74 108 70 112 72 C 114 76 110 80 106 78 Z" fill="#eab308"/>
          <path d="M 104 80 C 102 78 104 75 106 77 Z" fill="#4d7c0f"/>

          
          <g transform="translate(80, 52)">
            

            
            <path d="M 0 0 C -18 -10 -30 -32 -14 -40 C 2 -48 10 -28 0 0 Z" fill="#f59e0b" stroke="#d97706" stroke-width="1"/>
            
            <path d="M 0 0 C 18 -10 30 -32 14 -40 C -2 -48 -10 -28 0 0 Z" fill="#fbbf24" stroke="#d97706" stroke-width="1"/>
            
            <path d="M 0 0 C -28 -4 -42 16 -30 28 C -18 40 -6 18 0 0 Z" fill="#f59e0b" stroke="#d97706" stroke-width="1"/>
            
            <path d="M 0 0 C 28 -4 42 16 30 28 C 18 40 6 18 0 0 Z" fill="#fbbf24" stroke="#d97706" stroke-width="1"/>
            
            <path d="M 0 0 C -22 18 -14 42 0 42 C 14 42 22 18 0 0 Z" fill="#facc15" stroke="#d97706" stroke-width="1"/>

            
            <path d="M -14 -32 C -18 -26 -12 -16 -6 -8" stroke="#ffffff" stroke-width="2.5" stroke-linecap="round" fill="none" opacity="0.85"/>
            <path d="M 14 -32 C 18 -26 12 -16 6 -8" stroke="#ffffff" stroke-width="2.5" stroke-linecap="round" fill="none" opacity="0.85"/>
            <path d="M -24 14 C -22 22 -14 26 -6 14" stroke="#ffffff" stroke-width="2" stroke-linecap="round" fill="none" opacity="0.85"/>
            <path d="M 24 14 C 22 22 14 26 6 14" stroke="#ffffff" stroke-width="2" stroke-linecap="round" fill="none" opacity="0.85"/>
            <path d="M -8 30 C 0 34 6 32 8 26" stroke="#ffffff" stroke-width="2" stroke-linecap="round" fill="none" opacity="0.85"/>

            
            
            <circle cx="0" cy="0" r="10" fill="none" stroke="#d97706" stroke-width="2.5" stroke-dasharray="1.5 2.5"/>
            
            <circle cx="0" cy="0" r="5.5" fill="#65a30d" stroke="#365314" stroke-width="1"/>
            <circle cx="-1.5" cy="-1.5" r="1.5" fill="#84cc16"/>
            <circle cx="1.5" cy="-1.5" r="1.5" fill="#84cc16"/>
            <circle cx="0" cy="1.8" r="1.5" fill="#84cc16"/>
          </g>
        </svg>
      </div>
      <div class="badges">
        <span class="badge">5 glossy yellow petals</span>
        <span class="badge">Cup-shaped blossom</span>
      </div>
    </div>
  </div>

</body>
</html>

Identifying Common Trees and Wildflowers

<!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">
  <script src="{{VENDOR_CDN}}/classace-diagram.js"></script>
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      color: #1e2945;
      background: #ffffff;
      padding: 10px 8px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
      overflow-x: hidden;
    }

    /* Seasonal Controls */
    .controls {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      align-items: center;
      gap: 6px;
      width: 100%;
      max-width: 580px;
    }

    .season-btn {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      border-radius: 20px;
      padding: 6px 12px;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      box-shadow: none;
      transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
      user-select: none;
      -webkit-user-select: none;
    }

    .season-btn:hover {
      background: #e2e8f0;
    }

    /* High contrast active state (WCAG AA compliant > 4.5:1 ratio) */
    .season-btn.active {
      background: #0369a1;
      border-color: #0369a1;
      color: #ffffff;
      box-shadow: 0 2px 6px rgba(3, 105, 161, 0.35);
    }

    .season-btn.active:hover {
      background: #0284c7;
    }

    .play-btn {
      background: #f8fafc;
      border: 1px solid #cbd5e1;
      border-radius: 20px;
      padding: 6px 12px;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      color: #1e2945;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: background 0.2s ease;
      user-select: none;
    }

    .play-btn:hover {
      background: #e2e8f0;
    }

    /* Comparison Grid */
    .grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      width: 100%;
      max-width: 580px;
    }

    .tree-card {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 8px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }

    .tree-title {
      font-size: 14px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 2px;
    }

    .tree-sub {
      font-size: 12px;
      font-weight: 500;
      color: #475569;
      margin-bottom: 6px;
    }

    .scene {
      width: 100%;
      height: 180px;
      position: relative;
      border-radius: 8px;
      background: #e0f2fe;
      overflow: hidden;
      transition: background 0.4s ease;
    }

    /* SVG tree styling */
    svg {
      width: 100%;
      height: 100%;
      display: block;
    }

    .foliage {
      transition: fill 0.4s ease, opacity 0.4s ease;
    }

    .falling-leaves {
      transition: opacity 0.4s ease;
    }

    .snow-cover {
      transition: opacity 0.4s ease;
    }

    /* Seasonal ground transitions */
    .ground {
      transition: fill 0.4s ease;
    }

    @media (max-width: 380px) {
      .season-btn {
        padding: 5px 8px;
        font-size: 11.5px;
      }
      .play-btn {
        padding: 5px 9px;
        font-size: 11.5px;
      }
      .tree-title {
        font-size: 13px;
      }
      .tree-sub {
        font-size: 11px;
      }
      .scene {
        height: 160px;
      }
    }
  </style>
</head>
<body>

  
  <div class="controls">
    <button class="season-btn active" data-season="0">🌸 Spring</button>
    <button class="season-btn" data-season="1">☀️ Summer</button>
    <button class="season-btn" data-season="2">🍂 Autumn</button>
    <button class="season-btn" data-season="3">❄️ Winter</button>
    <button class="play-btn" id="playBtn" title="Play/Pause" aria-label="Play or pause seasonal animation">⏸ Pause</button>
  </div>

  
  <div class="grid">
    
    
    <div class="tree-card">
      <div class="tree-title">Deciduous</div>
      <div class="tree-sub">English Oak</div>
      <div class="scene" id="decScene">
        <svg viewBox="0 0 200 180" preserveAspectRatio="xMidYMax slice">
          
          <circle id="decSun" cx="168" cy="28" r="14" fill="#fbbf24" opacity="0.9" />
          
          
          <rect id="decGround" class="ground" x="-50" y="148" width="300" height="40" fill="#86efac" />
          <path id="decGroundSnow" class="snow-cover" d="M -50 148 Q 50 144 100 148 T 250 148 L 250 190 L -50 190 Z" fill="#ffffff" opacity="0" />

          
          <path d="M 91 155 L 94 100 L 78 78 L 84 75 L 96 95 L 97 62 L 103 62 L 104 95 L 116 75 L 122 78 L 106 100 L 109 155 Z" fill="#6c3311" />
          
          
          <path d="M 81 76 L 68 58 M 98 68 L 86 48 M 102 68 L 114 48 M 119 76 L 132 58" stroke="#6c3311" stroke-width="2.5" stroke-linecap="round" />

          
          <g id="decCanopy" style="opacity: 0; transition: opacity 0.4s ease;">
            <ellipse class="foliage" cx="100" cy="80" rx="52" ry="40" fill="#22c55e" />
            <ellipse class="foliage" cx="74" cy="90" rx="32" ry="28" fill="#16a34a" />
            <ellipse class="foliage" cx="126" cy="90" rx="32" ry="28" fill="#16a34a" />
            <ellipse class="foliage" cx="100" cy="56" rx="36" ry="28" fill="#4ade80" />
          </g>

          
          <g id="decBuds" opacity="1" style="transition: opacity 0.4s ease;">
            <circle cx="68" cy="58" r="5" fill="#86efac" />
            <circle cx="86" cy="48" r="5.5" fill="#86efac" />
            <circle cx="114" cy="48" r="5.5" fill="#86efac" />
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            <circle cx="78" cy="76" r="6" fill="#4ade80" />
            <circle cx="122" cy="76" r="6" fill="#4ade80" />
            <circle cx="100" cy="62" r="7" fill="#4ade80" />
          </g>

          
          <g id="decFalling" class="falling-leaves" opacity="0">
            <circle cx="70" cy="115" r="3" fill="#ea580c" />
            <circle cx="125" cy="125" r="3.5" fill="#d97706" />
            <circle cx="110" cy="138" r="3" fill="#ea580c" />
            <circle cx="85" cy="144" r="3" fill="#b45309" />
            
            <ellipse cx="60" cy="155" rx="7" ry="2.2" fill="#d97706" />
            <ellipse cx="80" cy="158" rx="8" ry="2.5" fill="#ea580c" />
            <ellipse cx="120" cy="160" rx="9" ry="2.5" fill="#b45309" />
            <ellipse cx="140" cy="157" rx="6" ry="2" fill="#d97706" />
          </g>
        </svg>
      </div>
    </div>

    
    <div class="tree-card">
      <div class="tree-title">Evergreen</div>
      <div class="tree-sub">Scots Pine</div>
      <div class="scene" id="eveScene">
        <svg viewBox="0 0 200 180" preserveAspectRatio="xMidYMax slice">
          
          <circle id="eveSun" cx="168" cy="28" r="14" fill="#fbbf24" opacity="0.9" />

          
          <rect id="eveGround" class="ground" x="-50" y="148" width="300" height="40" fill="#86efac" />
          <path id="eveGroundSnow" class="snow-cover" d="M -50 148 Q 50 144 100 148 T 250 148 L 250 190 L -50 190 Z" fill="#ffffff" opacity="0" />

          
          <polygon points="94,155 106,155 103,50 97,50" fill="#854d0e" />

          
          
          <polygon points="100,75 48,130 152,130" fill="#14532d" />
          
          <polygon points="100,50 58,95 142,95" fill="#15803d" />
          
          <polygon points="100,28 70,66 130,66" fill="#166534" />

          
          <ellipse cx="82" cy="112" rx="3.5" ry="5.5" fill="#713f12" />
          <ellipse cx="118" cy="114" rx="3.5" ry="5.5" fill="#713f12" />
          <ellipse cx="90" cy="82" rx="3" ry="4.5" fill="#713f12" />

          
          <g id="eveSnow" class="snow-cover" opacity="0">
            <path d="M 100 28 L 84 48 Q 100 44 116 48 Z" fill="#ffffff" />
            <path d="M 100 50 L 73 78 Q 100 72 127 78 Z" fill="#ffffff" />
            <path d="M 100 75 L 63 114 Q 100 108 137 114 Z" fill="#ffffff" />
          </g>
        </svg>
      </div>
    </div>

  </div>

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    const $$ = (sel) => document.querySelectorAll(sel);
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      if (!el) return;
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    const seasons = [
      {
        name: 'Spring',
        sky: '#e0f2fe',
        ground: '#86efac',
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        name: 'Summer',
        sky: '#bae6fd',
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        decFoliageColor: '#22c55e',
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        decBudsOpacity: 0,
        decFallingOpacity: 0,
        decGroundSnow: 0,
        eveGroundSnow: 0,
        eveSnowOpacity: 0
      },
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        name: 'Autumn',
        sky: '#fed7aa',
        ground: '#ca8a04',
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        decFallingOpacity: 1,
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        sky: '#e2e8f0',
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        decGroundSnow: 1,
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    let timer = null;

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    const playBtn = $('#playBtn');

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      const s = seasons[index];

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      $('#eveGround').setAttribute('fill', s.ground);

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        }
      });
    }

    // Initialize with Spring active & autoplay
    applySeason(0);
    startAutoPlay();
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
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      color: #1e293b;
      padding: 12px;
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      flex-direction: column;
      gap: 10px;
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      display: flex;
      justify-content: center;
      gap: 8px;
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      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 20px;
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      font-size: 13px;
      font-weight: 600;
      color: #64748b;
      cursor: pointer;
      box-shadow: 0 1px 2px rgba(0,0,0,0.04);
      transition: all 0.2s ease;
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      background: #0f766e;
      border-color: #0f766e;
      color: #ffffff;
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    .cards-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      width: 100%;
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        grid-template-columns: 1fr;
      }
    }

    .tree-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .card-title {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      display: flex;
      align-items: center;
      gap: 6px;
      border-bottom: 1px solid #f1f5f9;
      padding-bottom: 6px;
    }

    .features-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
    }

    .feature-box {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 10px;
      padding: 8px 4px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      transition: opacity 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
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      opacity: 0.25;
    }

    .feature-box.highlight {
      background: #f0fdf4;
      border-color: #86efac;
    }

    .circle-view {
      width: 68px;
      height: 68px;
      border-radius: 50%;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #ffffff;
      box-shadow: inset 0 0 0 1px rgba(0,0,0,0.08);
    }

    .feature-label {
      font-size: 12px;
      font-weight: 600;
      color: #334155;
      text-align: center;
      line-height: 1.2;
    }

    svg {
      display: block;
    }
  </style>
</head>
<body>

  <div class="nav-tabs">
    <button class="tab-btn active" data-filter="all">All</button>
    <button class="tab-btn" data-filter="leaf">Leaves</button>
    <button class="tab-btn" data-filter="bark">Bark</button>
  </div>

  <div class="cards-grid">
    
    <div class="tree-card">
      <div class="card-title">
        <span>🌳</span> English Oak
      </div>
      <div class="features-row">
        <div class="feature-box" data-type="leaf">
          <div class="circle-view">
            <svg width="68" height="68" viewBox="0 0 68 68">
              
              <path d="M 30,58 C 30,52 28,48 24,44 C 19,39 21,34 26,32 C 18,28 20,20 28,21 C 24,14 30,8 36,9 C 42,9 44,15 41,21 C 48,20 50,28 43,32 C 48,34 49,40 44,44 C 40,48 38,52 38,58 Z" fill="#2d7a38" />
              
              <path d="M 34,14 L 34,56 M 34,22 L 26,19 M 34,24 L 42,20 M 34,33 L 24,30 M 34,35 L 44,32 M 34,44 L 27,42 M 34,45 L 41,43" stroke="#1b4d23" stroke-width="1.2" stroke-linecap="round" fill="none" />
              
              <path d="M 44,48 C 44,45 54,45 54,48 L 53,51 C 53,52 45,52 45,51 Z" fill="#785333" />
              <path d="M 49,45 L 49,42" stroke="#52361b" stroke-width="1.2" stroke-linecap="round" />
              
              <path d="M 45,51 C 45,58 53,58 53,51 Z" fill="#a06e3b" />
            </svg>
          </div>
          <div class="feature-label">Lobed leaf<br>&amp; Acorn</div>
        </div>

        <div class="feature-box" data-type="bark">
          <div class="circle-view">
            <svg width="68" height="68" viewBox="0 0 68 68">
              <rect width="68" height="68" fill="#4a4039" />
              
              <path d="M 12,-5 Q 16,30 11,75 M 24,-5 Q 21,28 26,75 M 37,-5 Q 41,35 36,75 M 50,-5 Q 46,30 52,75 M 61,-5 Q 63,32 59,75" stroke="#2b231d" stroke-width="4.5" fill="none" />
              <path d="M 18,-5 Q 15,35 19,75 M 31,-5 Q 35,32 30,75 M 44,-5 Q 40,25 45,75 M 56,-5 Q 58,40 55,75" stroke="#6e6259" stroke-width="2" fill="none" />
              
              <path d="M 14,20 L 22,25 M 39,40 L 48,46 M 23,50 L 32,54 M 48,16 L 57,22" stroke="#1d1612" stroke-width="1.8" />
            </svg>
          </div>
          <div class="feature-label">Grooved<br>bark</div>
        </div>
      </div>
    </div>

    
    <div class="tree-card">
      <div class="card-title">
        <span>🌿</span> Silver Birch
      </div>
      <div class="features-row">
        <div class="feature-box" data-type="leaf">
          <div class="circle-view">
            <svg width="68" height="68" viewBox="0 0 68 68">
              
              <path d="M 28,14 L 32,18 L 35,17 L 38,22 L 42,23 L 44,29 L 47,32 L 45,37 L 46,42 L 39,46 L 35,43 L 31,46 L 25,41 L 26,36 L 23,31 L 27,27 L 26,21 L 28,14 Z" fill="#4ade80" />
              
              <path d="M 29,18 L 34,44 M 31,25 L 39,24 M 32,32 L 44,30 M 33,38 L 41,40 M 31,28 L 25,30 M 32,36 L 25,37" stroke="#16a34a" stroke-width="1" stroke-linecap="round" fill="none" />
              
              <path d="M 34,44 Q 35,52 38,55" stroke="#15803d" stroke-width="1.2" fill="none" />
              
              <path d="M 45,45 Q 49,52 48,60" stroke="#ca8a04" stroke-width="3" stroke-dasharray="2,1" fill="none" stroke-linecap="round" />
              <path d="M 49,44 Q 55,50 53,58" stroke="#a16207" stroke-width="2.5" stroke-dasharray="2,1" fill="none" stroke-linecap="round" />
            </svg>
          </div>
          <div class="feature-label">Toothed leaf<br>&amp; Catkin</div>
        </div>

        <div class="feature-box" data-type="bark">
          <div class="circle-view">
            <svg width="68" height="68" viewBox="0 0 68 68">
              
              <rect width="68" height="68" fill="#f1f5f9" />
              
              <path d="M 0,22 Q 35,24 68,20" stroke="#cbd5e1" stroke-width="3" fill="none" />
              <path d="M 0,46 Q 30,48 68,44" stroke="#cbd5e1" stroke-width="3" fill="none" />
              
              <path d="M 6,10 L 22,10 M 38,8 L 58,8 M 18,16 L 34,16 M 48,18 L 62,18 M 4,28 L 26,28 M 42,26 L 64,26 M 12,36 L 30,36 M 38,38 L 52,38 M 8,48 L 20,48 M 32,50 L 56,50 M 16,58 L 40,58 M 48,60 L 62,60" stroke="#334155" stroke-width="2.2" stroke-linecap="round" />
              <path d="M 28,12 L 32,12 M 10,22 L 14,22 M 54,32 L 60,32 M 4,42 L 8,42 M 24,54 L 28,54" stroke="#0f172a" stroke-width="3" stroke-linecap="round" />
            </svg>
          </div>
          <div class="feature-label">Peeling<br>bark</div>
        </div>
      </div>
    </div>
  </div>

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    const boxes = document.querySelectorAll('.feature-box');

    tabs.forEach(tab => {
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            box.classList.add('dimmed');
            box.classList.remove('highlight');
          }
        });
      });
    });
  </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>Plant Identification Flowchart</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    }

    :root {
      --primary: #22b7ff;
      --text: #1e2945;
      --muted: #64748b;
      --green-bg: #ecfdf5;
      --green-border: #10b981;
      --green-text: #065f46;
      --brown-bg: #fffbeb;
      --brown-border: #b45309;
      --brown-text: #78350f;
    }

    body {
      width: 100%;
      min-height: 100%;
      background: #ffffff;
      color: var(--text);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 12px;
    }

    .diagram {
      width: 100%;
      max-width: 520px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
      position: relative;
    }

    /* Step 1 Node */
    .root-node {
      background: #f8fafc;
      border: 2px solid #cbd5e1;
      border-radius: 999px;
      padding: 8px 18px;
      font-size: 15px;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
      z-index: 2;
    }

    /* SVG Connecting Lines */
    .branch-svg {
      width: 100%;
      height: 48px;
      overflow: visible;
    }

    .branch-line {
      stroke: #cbd5e1;
      stroke-width: 2.5;
      fill: none;
      stroke-dasharray: 4;
      transition: stroke 0.3s ease, stroke-width 0.3s ease, stroke-dasharray 0.3s ease;
    }

    .branch-line.active-left {
      stroke: var(--green-border);
      stroke-width: 3.5;
      stroke-dasharray: none;
    }

    .branch-line.active-right {
      stroke: var(--brown-border);
      stroke-width: 3.5;
      stroke-dasharray: none;
    }

    /* 2-Column Branches */
    .branches-grid {
      width: 100%;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .branch-col {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
      cursor: pointer;
      user-select: none;
      padding: 8px 4px;
      border-radius: 16px;
      transition: background-color 0.2s ease, transform 0.2s ease;
    }

    .pill {
      font-size: 13px;
      font-weight: 600;
      padding: 6px 10px;
      border-radius: 999px;
      text-align: center;
      line-height: 1.2;
      width: 100%;
      max-width: 170px;
      transition: all 0.3s ease;
    }

    .pill-green {
      background: var(--green-bg);
      color: var(--green-text);
      border: 1.5px solid #a7f3d0;
    }

    .pill-brown {
      background: var(--brown-bg);
      color: var(--brown-text);
      border: 1.5px solid #fde68a;
    }

    .arrow-down {
      font-size: 16px;
      color: #94a3b8;
      transition: color 0.3s ease;
    }

    /* Final Result Cards */
    .result-card {
      width: 100%;
      border-radius: 14px;
      padding: 12px 8px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      text-align: center;
      transition: all 0.3s ease;
      background: #ffffff;
      border: 2px solid #e2e8f0;
    }

    .result-card .icon {
      font-size: 38px;
      line-height: 1;
    }

    .result-card .title {
      font-size: 14px;
      font-weight: 700;
    }

    /* Active Highlight States */
    .branch-col.selected-left .pill-green {
      border-color: var(--green-border);
      box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
      font-weight: 700;
    }

    .branch-col.selected-left .arrow-down {
      color: var(--green-border);
    }

    .branch-col.selected-left .result-card {
      border-color: var(--green-border);
      background: var(--green-bg);
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.15);
    }

    .branch-col.selected-right .pill-brown {
      border-color: var(--brown-border);
      box-shadow: 0 0 0 2px rgba(180, 83, 9, 0.2);
      font-weight: 700;
    }

    .branch-col.selected-right .arrow-down {
      color: var(--brown-border);
    }

    .branch-col.selected-right .result-card {
      border-color: var(--brown-border);
      background: var(--brown-bg);
      box-shadow: 0 4px 12px rgba(180, 83, 9, 0.15);
    }

    /* Interactive Instruction Bar */
    .hint-bar {
      margin-top: 4px;
      font-size: 12px;
      font-weight: 600;
      color: var(--muted);
      display: flex;
      align-items: center;
      gap: 6px;
    }
  </style>
</head>
<body>

  <div class="diagram">
    
    <div class="root-node">
      <span>🔍</span>
      <span>Step 1: Check Stem</span>
    </div>

    
    <svg class="branch-svg" viewBox="0 0 400 48" preserveAspectRatio="none">
      <path id="lineLeft" class="branch-line active-left" d="M 200,0 C 200,24 100,24 100,48" />
      <path id="lineRight" class="branch-line" d="M 200,0 C 200,24 300,24 300,48" />
    </svg>

    
    <div class="branches-grid">
      
      
      <div id="colLeft" class="branch-col selected-left" onclick="selectBranch('left')">
        <div class="pill pill-green">Soft, green, bendy</div>
        <div class="arrow-down">↓</div>
        <div class="result-card">
          <span class="icon">🌼</span>
          <span class="title">Wild Plant</span>
        </div>
      </div>

      
      <div id="colRight" class="branch-col" onclick="selectBranch('right')">
        <div class="pill pill-brown">Woody with bark</div>
        <div class="arrow-down">↓</div>
        <div class="result-card">
          <span class="icon">🌳</span>
          <span class="title">Tree / Sapling</span>
        </div>
      </div>

    </div>

    <div class="hint-bar">
      <span>✦</span> Tap either path to inspect
    </div>
  </div>

  <script>
    function selectBranch(side) {
      const colLeft = document.getElementById('colLeft');
      const colRight = document.getElementById('colRight');
      const lineLeft = document.getElementById('lineLeft');
      const lineRight = document.getElementById('lineRight');

      if (side === 'left') {
        colLeft.classList.add('selected-left');
        colRight.classList.remove('selected-right');
        lineLeft.classList.add('active-left');
        lineRight.classList.remove('active-right');
      } else {
        colRight.classList.add('selected-right');
        colLeft.classList.remove('selected-left');
        lineRight.classList.add('active-right');
        lineLeft.classList.remove('active-left');
      }
    }
  </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;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    }

    body {
      width: 100%;
      background: #ffffff;
      color: #1e2945;
      padding: 8px 6px;
      user-select: none;
      -webkit-user-select: none;
    }

    /* Interactive filter buttons */
    .controls {
      display: flex;
      justify-content: center;
      gap: 6px;
      margin-bottom: 8px;
      flex-wrap: wrap;
    }

    .pill-btn {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      border-radius: 20px;
      padding: 4px 12px;
      font-size: 13px;
      font-weight: 600;
      color: #475569;
      cursor: pointer;
      transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    }

    .pill-btn.active {
      background: #16a34a;
      border-color: #16a34a;
      color: #ffffff;
      box-shadow: 0 2px 6px rgba(22, 163, 74, 0.25);
    }

    /* Side-by-side grid */
    .comparison-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      width: 100%;
      max-width: 600px;
      margin: 0 auto;
    }

    /* Inner cards */
    .plant-card {
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 12px;
      padding: 8px 6px 10px 6px;
      display: flex;
      flex-direction: column;
      align-items: center;
      position: relative;
      box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
    }

    .card-header {
      text-align: center;
      margin-bottom: 4px;
    }

    .plant-title {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      line-height: 1.2;
    }

    .stem-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      padding: 2px 8px;
      border-radius: 10px;
      margin-top: 2px;
    }

    .badge-wild {
      background: #dcfce7;
      color: #15803d;
    }

    .badge-tree {
      background: #fef3c7;
      color: #92400e;
    }

    /* SVG Containers */
    .svg-container {
      width: 100%;
      height: auto;
      max-height: 280px;
    }

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

    /* Anatomy Part Groups */
    .part {
      transition: opacity 0.3s ease, filter 0.3s ease;
    }

    .part.dimmed {
      opacity: 0.18;
    }

    .part.highlighted {
      opacity: 1;
      filter: drop-shadow(0 0 3px rgba(22, 163, 74, 0.4));
    }

    /* Labels */
    .label-text {
      font-size: 12px;
      font-weight: 700;
      fill: #334155;
    }

    .label-line {
      stroke: #94a3b8;
      stroke-width: 1.5;
      stroke-dasharray: 2, 2;
    }

    .soil-line {
      stroke: #a16207;
      stroke-width: 1.5;
      stroke-dasharray: 4, 3;
    }
  </style>
</head>
<body>

  
  <div class="controls">
    <button class="pill-btn active" onclick="setFilter('all', this)">All Parts</button>
    <button class="pill-btn" onclick="setFilter('stem', this)">Stem &amp; Trunk</button>
    <button class="pill-btn" onclick="setFilter('leaves', this)">Leaves</button>
    <button class="pill-btn" onclick="setFilter('roots', this)">Roots</button>
  </div>

  <div class="comparison-grid">
    
    
    <div class="plant-card">
      <div class="card-header">
        <div class="plant-title">Wild Plant</div>
        <span class="stem-badge badge-wild">Soft Green Stem</span>
      </div>

      <div class="svg-container">
        <svg viewBox="0 0 190 250">
          
          <line x1="10" y1="185" x2="180" y2="185" class="soil-line" />

          
          <g class="part part-flower">
            
            <circle cx="95" cy="42" r="18" fill="#facc15" />
            <circle cx="95" cy="42" r="14" fill="#fbbf24" />
            <circle cx="95" cy="42" r="9" fill="#f59e0b" />
            
            <g stroke="#f59e0b" stroke-width="2" stroke-linecap="round">
              <line x1="95" y1="20" x2="95" y2="28" />
              <line x1="95" y1="56" x2="95" y2="64" />
              <line x1="73" y1="42" x2="81" y2="42" />
              <line x1="109" y1="42" x2="117" y2="42" />
              <line x1="80" y1="27" x2="86" y2="33" />
              <line x1="110" y1="27" x2="104" y2="33" />
              <line x1="80" y1="57" x2="86" y2="51" />
              <line x1="110" y1="57" x2="104" y2="51" />
            </g>
            
            <text x="145" y="42" class="label-text" text-anchor="middle">Flower</text>
            <line x1="117" y1="42" x2="124" y2="42" class="label-line" />
          </g>

          
          <g class="part part-stem">
            
            <path d="M 95 60 Q 88 120 95 185" fill="none" stroke="#22c55e" stroke-width="6" stroke-linecap="round" />
            
            <text x="32" y="115" class="label-text" text-anchor="middle">Soft stem</text>
            <line x1="60" y1="115" x2="88" y2="115" class="label-line" />
          </g>

          
          <g class="part part-leaves">
            
            <path d="M 95 180 C 70 178 40 172 25 178 C 45 168 65 174 95 180 Z" fill="#16a34a" />
            <path d="M 95 180 C 120 178 150 172 165 178 C 145 168 125 174 95 180 Z" fill="#16a34a" />
            <path d="M 95 182 C 75 180 50 182 35 184 C 55 184 75 182 95 182 Z" fill="#15803d" />
            <path d="M 95 182 C 115 180 140 182 155 184 C 135 184 115 182 95 182 Z" fill="#15803d" />
            
            <text x="145" y="160" class="label-text" text-anchor="middle">Ground leaves</text>
            <line x1="145" y1="164" x2="135" y2="174" class="label-line" />
          </g>

          
          <g class="part part-roots">
            
            <path d="M 95 185 Q 93 215 95 240" fill="none" stroke="#e2e8f0" stroke-width="4" stroke-linecap="round" />
            <path d="M 95 195 Q 80 205 70 215" fill="none" stroke="#cbd5e1" stroke-width="2" stroke-linecap="round" />
            <path d="M 95 205 Q 110 218 120 230" fill="none" stroke="#cbd5e1" stroke-width="2" stroke-linecap="round" />
            <path d="M 95 220 Q 85 230 80 238" fill="none" stroke="#cbd5e1" stroke-width="1.5" stroke-linecap="round" />
            
            <text x="35" y="218" class="label-text" text-anchor="middle">Soft roots</text>
            <line x1="64" y1="215" x2="88" y2="215" class="label-line" />
          </g>
        </svg>
      </div>
    </div>

    
    <div class="plant-card">
      <div class="card-header">
        <div class="plant-title">Tree</div>
        <span class="stem-badge badge-tree">Hard Woody Trunk</span>
      </div>

      <div class="svg-container">
        <svg viewBox="0 0 190 250">
          
          <line x1="10" y1="185" x2="180" y2="185" class="soil-line" />

          
          <g class="part part-leaves">
            
            <circle cx="95" cy="55" r="38" fill="#15803d" />
            <circle cx="65" cy="68" r="28" fill="#16a34a" />
            <circle cx="125" cy="68" r="28" fill="#16a34a" />
            <circle cx="95" cy="45" r="26" fill="#22c55e" />
            
            <text x="145" y="24" class="label-text" text-anchor="middle">High crown</text>
            <line x1="120" y1="28" x2="105" y2="38" class="label-line" />
          </g>

          
          <g class="part part-stem">
            
            <path d="M 82 85 L 80 185 L 110 185 L 108 85 Z" fill="#78350f" />
            
            <line x1="88" y1="100" x2="88" y2="175" stroke="#451a03" stroke-width="2" stroke-linecap="round" />
            <line x1="96" y1="92" x2="96" y2="180" stroke="#451a03" stroke-width="2" stroke-linecap="round" />
            <line x1="103" y1="105" x2="103" y2="170" stroke="#451a03" stroke-width="2" stroke-linecap="round" />
            
            <path d="M 85 95 L 60 70" stroke="#78350f" stroke-width="6" stroke-linecap="round" />
            <path d="M 105 95 L 130 70" stroke="#78350f" stroke-width="6" stroke-linecap="round" />
            
            <text x="35" y="135" class="label-text" text-anchor="middle">Woody trunk</text>
            <line x1="68" y1="135" x2="80" y2="135" class="label-line" />
          </g>

          
          <g class="part part-roots">
            
            <path d="M 80 185 Q 60 210 35 225" fill="none" stroke="#78350f" stroke-width="5" stroke-linecap="round" />
            <path d="M 110 185 Q 130 210 155 225" fill="none" stroke="#78350f" stroke-width="5" stroke-linecap="round" />
            <path d="M 95 185 Q 95 215 95 242" fill="none" stroke="#78350f" stroke-width="4" stroke-linecap="round" />
            
            <text x="145" y="240" class="label-text" text-anchor="middle">Deep roots</text>
            <line x1="116" y1="236" x2="102" y2="228" class="label-line" />
          </g>
        </svg>
      </div>
    </div>

  </div>

  <script>
    function setFilter(type, btn) {
      // Update active button state
      const buttons = document.querySelectorAll('.pill-btn');
      buttons.forEach(b => b.classList.remove('active'));
      btn.classList.add('active');

      const allParts = document.querySelectorAll('.part');

      if (type === 'all') {
        allParts.forEach(p => {
          p.classList.remove('dimmed', 'highlighted');
        });
      } else {
        allParts.forEach(p => {
          if (p.classList.contains('part-' + type)) {
            p.classList.remove('dimmed');
            p.classList.add('highlighted');
          } else {
            p.classList.remove('highlighted');
            p.classList.add('dimmed');
          }
        });
      }
    }
  </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 {
      width: 100%;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #f8fafc;
      color: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    
    /* Toggle bar */
    .controls {
      display: flex;
      justify-content: center;
      gap: 8px;
    }
    .toggle-btn {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 20px;
      padding: 6px 16px;
      font-size: 14px;
      font-weight: 600;
      color: #64748b;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: all 0.25s ease;
    }
    .toggle-btn.active {
      background: #0284c7;
      border-color: #0284c7;
      color: #ffffff;
      box-shadow: 0 2px 6px rgba(2, 132, 199, 0.25);
    }

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

    .leaf-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 12px 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      position: relative;
      overflow: hidden;
      min-height: 240px;
    }

    .card-title {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      text-align: center;
      line-height: 1.2;
    }
    .card-sub {
      font-size: 12px;
      font-weight: 500;
      color: #64748b;
      margin-top: 2px;
      text-align: center;
    }

    .art-container {
      width: 100%;
      height: 140px;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 8px 0 4px;
    }

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

    /* Labels & Badges */
    .badges {
      display: flex;
      flex-direction: column;
      gap: 6px;
      width: 100%;
      margin-top: auto;
    }
    .badge {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 12px;
      font-weight: 600;
      background: #f1f5f9;
      color: #334155;
      padding: 5px 8px;
      border-radius: 6px;
    }
    .badge-icon {
      font-size: 13px;
      flex-shrink: 0;
    }

    /* Winter State Animations */
    .broad-leaf-shape {
      transition: fill 0.6s ease, opacity 0.6s ease, transform 0.6s ease;
      transform-origin: center bottom;
    }
    .water-vapour {
      transition: opacity 0.4s ease;
    }
    .waxy-sheen {
      transition: opacity 0.4s ease;
    }
    .water-shield {
      transition: stroke 0.4s ease, opacity 0.4s ease;
    }
    .winter-tag {
      font-size: 11px;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 12px;
      text-align: center;
      transition: all 0.3s ease;
    }

    /* Condition styles */
    body.is-winter .broad-leaf-shape {
      fill: #b45309 !important;
      opacity: 0.85;
      transform: translateY(6px) rotate(4deg);
    }
    body.is-winter .broad-veins {
      stroke: #78350f !important;
    }
    body.is-winter .water-vapour {
      opacity: 1;
      animation: floatUp 2s infinite linear;
    }
    body:not(.is-winter) .water-vapour {
      opacity: 0.2;
    }

    @keyframes floatUp {
      0% { transform: translateY(0); opacity: 0.8; }
      100% { transform: translateY(-10px); opacity: 0; }
    }

    body.is-winter .needle-snow {
      opacity: 1;
    }
    body:not(.is-winter) .needle-snow {
      opacity: 0;
    }

    @media (max-width: 360px) {
      body { padding: 8px; gap: 8px; }
      .leaf-card { padding: 10px 6px; min-height: 220px; }
      .badge { font-size: 11px; padding: 4px 6px; }
      .card-title { font-size: 14px; }
    }
  </style>
</head>
<body>

  
  <div class="controls">
    <button class="toggle-btn active" id="btnSummer" onclick="setMode('summer')">☀️ Summer</button>
    <button class="toggle-btn" id="btnWinter" onclick="setMode('winter')">❄️ Winter</button>
  </div>

  
  <div class="grid">
    
    
    <div class="leaf-card">
      <div class="card-title">Broad Leaf</div>
      <div class="card-sub">Oak &bull; Maple</div>

      <div class="art-container">
        <svg viewBox="0 0 160 130">
          <defs>
            <linearGradient id="broadGrad" x1="0" y1="0" x2="0" y2="1">
              <stop offset="0%" stop-color="#4ade80"/>
              <stop offset="100%" stop-color="#16a34a"/>
            </linearGradient>
          </defs>

          
          <g class="water-vapour">
            <circle cx="50" cy="30" r="3" fill="#38bdf8" />
            <circle cx="110" cy="35" r="3.5" fill="#38bdf8" />
            <circle cx="80" cy="18" r="2.5" fill="#38bdf8" />
            <text x="80" y="10" font-size="9" fill="#0284c7" font-weight="700" text-anchor="middle">💧 Water Lost</text>
          </g>

          
          <line x1="80" y1="120" x2="80" y2="90" stroke="#713f12" stroke-width="4" stroke-linecap="round"/>

          
          <path class="broad-leaf-shape" d="M 80,20 
                   C 105,25 135,45 135,75 
                   C 135,98 105,108 80,105 
                   C 55,108 25,98 25,75 
                   C 25,45 55,25 80,20 Z" 
                fill="url(#broadGrad)" stroke="#15803d" stroke-width="2"/>

          
          <line class="broad-veins" x1="80" y1="30" x2="80" y2="105" stroke="#166534" stroke-width="2.5" stroke-linecap="round"/>
          
          <line class="broad-veins" x1="80" y1="50" x2="115" y2="42" stroke="#166534" stroke-width="1.8" stroke-linecap="round"/>
          <line class="broad-veins" x1="80" y1="50" x2="45" y2="42" stroke="#166534" stroke-width="1.8" stroke-linecap="round"/>
          <line class="broad-veins" x1="80" y1="72" x2="120" y2="68" stroke="#166534" stroke-width="1.8" stroke-linecap="round"/>
          <line class="broad-veins" x1="80" y1="72" x2="40" y2="68" stroke="#166534" stroke-width="1.8" stroke-linecap="round"/>
          <line class="broad-veins" x1="80" y1="92" x2="105" y2="92" stroke="#166534" stroke-width="1.8" stroke-linecap="round"/>
          <line class="broad-veins" x1="80" y1="92" x2="55" y2="92" stroke="#166534" stroke-width="1.8" stroke-linecap="round"/>
        </svg>
      </div>

      <div class="badges">
        <div class="badge">
          <span class="badge-icon">🍃</span>
          <span>Wide, flat blade</span>
        </div>
        <div class="badge" id="broadStatus" style="background:#fee2e2; color:#991b1b;">
          <span class="badge-icon">🍂</span>
          <span>Drops in Autumn</span>
        </div>
      </div>
    </div>

    
    <div class="leaf-card">
      <div class="card-title">Needle Leaf</div>
      <div class="card-sub">Pine &bull; Spruce</div>

      <div class="art-container">
        <svg viewBox="0 0 160 130">
          <defs>
            <linearGradient id="needleGrad" x1="0" y1="0" x2="1" y2="0">
              <stop offset="0%" stop-color="#14532d"/>
              <stop offset="40%" stop-color="#22c55e"/>
              <stop offset="100%" stop-color="#15803d"/>
            </linearGradient>
            <linearGradient id="waxGlow" x1="0" y1="0" x2="1" y2="1">
              <stop offset="0%" stop-color="#ffffff" stop-opacity="0.9"/>
              <stop offset="100%" stop-color="#ffffff" stop-opacity="0.1"/>
            </linearGradient>
          </defs>

          
          <rect x="74" y="105" width="12" height="14" rx="2" fill="#78350f"/>

          
          <path d="M 76,108 C 65,70 52,40 48,15 C 50,15 54,40 78,108 Z" 
                fill="url(#needleGrad)" stroke="#14532d" stroke-width="1"/>
          
          
          <path d="M 84,108 C 95,70 108,40 112,15 C 110,15 106,40 82,108 Z" 
                fill="url(#needleGrad)" stroke="#14532d" stroke-width="1"/>

          
          <path class="waxy-sheen" d="M 77,100 C 68,68 56,42 51,20" 
                fill="none" stroke="url(#waxGlow)" stroke-width="2.5" stroke-linecap="round"/>
          <path class="waxy-sheen" d="M 83,100 C 92,68 104,42 109,20" 
                fill="none" stroke="url(#waxGlow)" stroke-width="2.5" stroke-linecap="round"/>

          
          <circle cx="80" cy="55" r="16" fill="#e0f2fe" stroke="#0284c7" stroke-width="2" />
          <text x="80" y="58" font-size="12" text-anchor="middle">💧🔒</text>
          <text x="80" y="80" font-size="8.5" fill="#0369a1" font-weight="700" text-anchor="middle">Water Sealed</text>

          
          <g class="needle-snow" style="transition: opacity 0.4s ease;">
            <ellipse cx="48" cy="15" rx="7" ry="3" fill="#ffffff"/>
            <ellipse cx="112" cy="15" rx="7" ry="3" fill="#ffffff"/>
            <path d="M 72,104 Q 80,100 88,104 Z" fill="#ffffff"/>
          </g>
        </svg>
      </div>

      <div class="badges">
        <div class="badge">
          <span class="badge-icon">✨</span>
          <span>Thick waxy coat</span>
        </div>
        <div class="badge" id="needleStatus" style="background:#dcfce7; color:#166534;">
          <span class="badge-icon">🌲</span>
          <span>Green all Winter</span>
        </div>
      </div>
    </div>

  </div>

  <script>
    function setMode(mode) {
      const isWinter = mode === 'winter';
      document.body.classList.toggle('is-winter', isWinter);
      document.getElementById('btnSummer').classList.toggle('active', !isWinter);
      document.getElementById('btnWinter').classList.toggle('active', isWinter);
    }
  </script>
</body>
</html>

Comparing Deciduous and Evergreen Trees

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: transparent;
      padding: 16px 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
    }

    .key-container {
      width: 100%;
      max-width: 580px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
    }

    /* Top Question Box */
    .question-card {
      background: #f1f5f9;
      border: 2px solid #cbd5e1;
      border-radius: 12px;
      padding: 10px 18px;
      text-align: center;
      font-weight: 700;
      font-size: 15px;
      color: #1e2945;
      display: flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 2px 4px rgba(0,0,0,0.04);
    }

    /* Branching connector SVG */
    .branch-svg {
      width: 100%;
      max-width: 440px;
      height: 36px;
      display: block;
    }

    .branch-line {
      fill: none;
      stroke: #94a3b8;
      stroke-width: 2.5;
      stroke-linecap: round;
    }

    /* 2-column paths */
    .paths-grid {
      width: 100%;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .path-card {
      border-radius: 14px;
      padding: 14px 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      cursor: pointer;
      user-select: none;
      transition: box-shadow 0.25s ease, background-color 0.25s ease;
    }

    /* Deciduous branch */
    .path-card.deciduous {
      background: #fef8ee;
      border: 2px solid #f59e0b;
    }
    .path-card.deciduous.active {
      box-shadow: 0 0 0 3px #f59e0b44, 0 4px 12px rgba(245, 158, 11, 0.2);
    }

    /* Evergreen branch */
    .path-card.evergreen {
      background: #f0fdf4;
      border: 2px solid #16a34a;
    }
    .path-card.evergreen.active {
      box-shadow: 0 0 0 3px #16a34a44, 0 4px 12px rgba(22, 163, 74, 0.2);
    }

    .cue-pill {
      font-size: 12px;
      font-weight: 600;
      padding: 4px 8px;
      border-radius: 20px;
      margin-bottom: 8px;
      display: inline-block;
    }
    .deciduous .cue-pill {
      background: #fde68a;
      color: #92400e;
    }
    .evergreen .cue-pill {
      background: #bbf7d0;
      color: #166534;
    }

    .icon-display {
      font-size: 32px;
      line-height: 1;
      margin: 4px 0 8px 0;
    }

    .tree-title {
      font-size: 16px;
      font-weight: 800;
      margin-bottom: 4px;
    }
    .deciduous .tree-title { color: #b45309; }
    .evergreen .tree-title { color: #15803d; }

    .examples {
      font-size: 13px;
      font-weight: 500;
      color: #64748b;
    }

    @media (max-width: 400px) {
      .question-card { font-size: 13px; padding: 8px 12px; }
      .tree-title { font-size: 14px; }
      .cue-pill { font-size: 11px; }
      .examples { font-size: 12px; }
      .icon-display { font-size: 28px; }
    }
  </style>
</head>
<body>

  <div class="key-container">
    
    <div class="question-card">
      <span>❄️ Leaves in Winter?</span>
    </div>

    
    <svg class="branch-svg" viewBox="0 0 400 36" preserveAspectRatio="none">
      
      <path class="branch-line" d="M 200,0 L 200,10 L 100,10 L 100,32" />
      <polygon points="96,28 104,28 100,35" fill="#94a3b8" />
      
      <path class="branch-line" d="M 200,0 L 200,10 L 300,10 L 300,32" />
      <polygon points="296,28 304,28 300,35" fill="#94a3b8" />
    </svg>

    
    <div class="paths-grid">
      
      <div class="path-card deciduous active" id="deciduousCard" onclick="selectCard('deciduous')">
        <span class="cue-pill">🍂 Bare / Fallen</span>
        <div class="icon-display">🍁 🪵</div>
        <div class="tree-title">Deciduous</div>
        <div class="examples">Oak · Birch · Maple</div>
      </div>

      
      <div class="path-card evergreen active" id="evergreenCard" onclick="selectCard('evergreen')">
        <span class="cue-pill">🌲 Green all year</span>
        <div class="icon-display">🌲 🌿</div>
        <div class="tree-title">Evergreen</div>
        <div class="examples">Pine · Holly · Fir</div>
      </div>
    </div>
  </div>

  <script>
    function selectCard(type) {
      const dec = document.getElementById('deciduousCard');
      const eve = document.getElementById('evergreenCard');
      
      if (type === 'deciduous') {
        dec.classList.add('active');
        eve.classList.remove('active');
      } else {
        eve.classList.add('active');
        dec.classList.remove('active');
      }
    }
  </script>

</body>
</html>

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

    body {
      background: #ffffff;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
      padding: 12px 12px 8px;
    }

    /* Seasonal Controls */
    .controls {
      display: flex;
      gap: 6px;
      width: 100%;
      max-width: 440px;
      justify-content: center;
      margin-bottom: 8px;
    }

    .season-btn {
      flex: 1;
      min-width: 70px;
      padding: 8px 4px;
      border: 1px solid #e6e6e6;
      background: #f8fafc;
      color: #64748b;
      font-size: 13px;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 2px;
      transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    }

    .season-btn .icon {
      font-size: 15px;
    }

    .season-btn.active {
      background: #ffffff;
      color: #1e2945;
      border-color: #22b7ff;
      box-shadow: 0 0 0 1px #22b7ff, 0 2px 6px rgba(34, 183, 255, 0.15);
    }

    /* Illustration Stage */
    .stage-container {
      position: relative;
      width: 100%;
      max-width: 440px;
      height: 240px;
      border-radius: 12px;
      background: #f1f5f9;
      border: 1px solid #e6e6e6;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 0.5s ease;
    }

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

    /* Animated foliage layers */
    .foliage, .ground-layer, .snow-accents, .falling-leaves {
      transition: opacity 0.45s ease, transform 0.45s ease;
    }

    .hidden {
      opacity: 0;
      pointer-events: none;
    }

    .visible {
      opacity: 1;
    }

    /* Falling leaves animation in Autumn */
    @keyframes leafDrift {
      0% { transform: translateY(-10px) rotate(0deg); opacity: 0; }
      20% { opacity: 0.9; }
      80% { opacity: 0.9; }
      100% { transform: translateY(65px) rotate(45deg); opacity: 0; }
    }

    .falling-leaves.visible circle,
    .falling-leaves.visible ellipse {
      animation: leafDrift 3.2s infinite linear;
    }

    .leaf-2 { animation-delay: 0.8s !important; }
    .leaf-3 { animation-delay: 1.6s !important; }
    .leaf-4 { animation-delay: 2.3s !important; }

    /* Caption Box */
    .caption-card {
      width: 100%;
      max-width: 440px;
      margin-top: 8px;
      padding: 8px 12px;
      background: #f8fafc;
      border: 1px solid #e6e6e6;
      border-radius: 8px;
      text-align: center;
      font-size: 14px;
      font-weight: 500;
      color: #1e2945;
      min-height: 40px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .caption-highlight {
      font-weight: 700;
      color: #0284c7;
      margin-right: 4px;
    }
  </style>
</head>
<body>

  
  <div class="controls" role="tablist" aria-label="Oak Tree Seasons">
    <button class="season-btn active" onclick="setSeason(0)" role="tab" id="btn-0">
      <span class="icon">🌸</span>
      <span>Spring</span>
    </button>
    <button class="season-btn" onclick="setSeason(1)" role="tab" id="btn-1">
      <span class="icon">☀️</span>
      <span>Summer</span>
    </button>
    <button class="season-btn" onclick="setSeason(2)" role="tab" id="btn-2">
      <span class="icon">🍂</span>
      <span>Autumn</span>
    </button>
    <button class="season-btn" onclick="setSeason(3)" role="tab" id="btn-3">
      <span class="icon">❄️</span>
      <span>Winter</span>
    </button>
  </div>

  
  <div class="stage-container" id="stage">
    <svg viewBox="0 0 400 240" aria-hidden="true">
      <defs>
        
        <linearGradient id="skySpring" x1="0" y1="0" x2="0" y2="1">
          <stop offset="0%" stop-color="#e0f2fe"/>
          <stop offset="100%" stop-color="#f0f9ff"/>
        </linearGradient>
        <linearGradient id="skySummer" x1="0" y1="0" x2="0" y2="1">
          <stop offset="0%" stop-color="#bae6fd"/>
          <stop offset="100%" stop-color="#e0f2fe"/>
        </linearGradient>
        <linearGradient id="skyAutumn" x1="0" y1="0" x2="0" y2="1">
          <stop offset="0%" stop-color="#fed7aa"/>
          <stop offset="100%" stop-color="#ffedd5"/>
        </linearGradient>
        <linearGradient id="skyWinter" x1="0" y1="0" x2="0" y2="1">
          <stop offset="0%" stop-color="#cbd5e1"/>
          <stop offset="100%" stop-color="#e2e8f0"/>
        </linearGradient>
      </defs>

      
      <rect id="skyBg" width="400" height="240" fill="url(#skySpring)" transition="fill 0.5s"/>

      
      <path d="M-20 200 Q 100 175, 220 190 T 420 180 L 420 240 L -20 240 Z" fill="#d1fae5" id="hillBack" opacity="0.6"/>

      
      
      <g id="groundSpring" class="ground-layer visible">
        <path d="M-10 195 Q 120 185, 230 192 T 410 190 L 410 240 L -10 240 Z" fill="#86efac"/>
        <circle cx="90" cy="205" r="2.5" fill="#f43f5e"/>
        <circle cx="130" cy="215" r="2" fill="#fbbf24"/>
        <circle cx="280" cy="208" r="2.5" fill="#f43f5e"/>
        <circle cx="320" cy="212" r="2" fill="#fbbf24"/>
      </g>

      
      <g id="groundSummer" class="ground-layer hidden">
        <path d="M-10 195 Q 120 185, 230 192 T 410 190 L 410 240 L -10 240 Z" fill="#22c55e"/>
        <circle cx="100" cy="210" r="3" fill="#ffffff"/>
        <circle cx="300" cy="210" r="3" fill="#ffffff"/>
      </g>

      
      <g id="groundAutumn" class="ground-layer hidden">
        <path d="M-10 195 Q 120 185, 230 192 T 410 190 L 410 240 L -10 240 Z" fill="#ca8a04"/>
        
        <ellipse cx="150" cy="205" rx="5" ry="2.5" fill="#ea580c" transform="rotate(-10 150 205)"/>
        <ellipse cx="180" cy="212" rx="6" ry="3" fill="#dc2626" transform="rotate(15 180 212)"/>
        <ellipse cx="225" cy="207" rx="5.5" ry="2.5" fill="#d97706" transform="rotate(-25 225 207)"/>
        <ellipse cx="250" cy="215" rx="6" ry="3" fill="#b45309" transform="rotate(8 250 215)"/>
      </g>

      
      <g id="groundWinter" class="ground-layer hidden">
        <path d="M-10 195 Q 120 185, 230 192 T 410 190 L 410 240 L -10 240 Z" fill="#ffffff"/>
        <path d="M 0 205 Q 180 198, 400 206 L 400 240 L 0 240 Z" fill="#f1f5f9"/>
      </g>

      
      <g id="oakSkeleton">
        
        <path d="M 184 205 C 185 170, 188 150, 182 130 C 180 120, 172 108, 160 95 L 168 92 C 180 106, 188 116, 192 125 C 196 115, 208 102, 228 92 L 234 96 C 218 108, 208 118, 204 130 C 200 148, 204 175, 214 205 Z" fill="#6c4a30"/>
        
        
        <path d="M 175 115 C 160 110, 142 112, 125 120 L 123 115 C 142 106, 162 104, 178 110 Z" fill="#6c4a30"/>
        <path d="M 145 109 C 140 98, 132 92, 120 88 L 122 84 C 136 88, 145 95, 150 107 Z" fill="#6c4a30"/>
        <path d="M 166 98 C 162 82, 154 72, 142 64 L 146 61 C 159 70, 168 80, 172 96 Z" fill="#6c4a30"/>

        
        <path d="M 194 125 C 193 105, 191 85, 186 66 L 192 65 C 197 84, 199 104, 200 125 Z" fill="#6c4a30"/>
        <path d="M 193 88 C 200 78, 208 72, 218 67 L 221 71 C 212 76, 204 82, 198 91 Z" fill="#6c4a30"/>

        
        <path d="M 212 115 C 230 110, 248 114, 268 124 L 265 129 C 247 119, 230 116, 210 120 Z" fill="#6c4a30"/>
        <path d="M 238 113 C 246 100, 258 92, 274 86 L 276 90 C 261 96, 250 103, 243 115 Z" fill="#6c4a30"/>
        <path d="M 224 98 C 232 84, 244 75, 258 68 L 261 72 C 248 78, 237 87, 230 100 Z" fill="#6c4a30"/>
      </g>

      
      
      <g id="foliageSpring" class="foliage visible">
        <circle cx="120" cy="88" r="14" fill="#86efac" opacity="0.9"/>
        <circle cx="125" cy="118" r="12" fill="#4ade80" opacity="0.85"/>
        <circle cx="144" cy="62" r="15" fill="#86efac" opacity="0.9"/>
        <circle cx="186" cy="64" r="16" fill="#4ade80" opacity="0.85"/>
        <circle cx="218" cy="66" r="15" fill="#86efac" opacity="0.9"/>
        <circle cx="260" cy="68" r="14" fill="#4ade80" opacity="0.85"/>
        <circle cx="274" cy="88" r="13" fill="#86efac" opacity="0.9"/>
        <circle cx="266" cy="122" r="12" fill="#4ade80" opacity="0.85"/>
        <circle cx="198" cy="92" r="15" fill="#86efac" opacity="0.9"/>
        
        <circle cx="160" cy="80" r="10" fill="#bbf7d0"/>
        <circle cx="236" cy="82" r="10" fill="#bbf7d0"/>
      </g>

      
      <g id="foliageSummer" class="foliage hidden">
        
        <path d="M 120 125 C 80 120, 75 75, 115 55 C 130 25, 180 20, 200 40 C 225 15, 275 25, 285 55 C 325 70, 320 120, 280 130 C 265 145, 230 145, 210 135 C 190 145, 140 145, 120 125 Z" fill="#15803d"/>
        
        <circle cx="135" cy="80" r="32" fill="#16a34a"/>
        <circle cx="175" cy="55" r="36" fill="#22c55e"/>
        <circle cx="225" cy="55" r="36" fill="#16a34a"/>
        <circle cx="265" cy="80" r="32" fill="#15803d"/>
        <circle cx="200" cy="75" r="38" fill="#22c55e"/>
        <circle cx="155" cy="105" r="28" fill="#16a34a"/>
        <circle cx="245" cy="105" r="28" fill="#15803d"/>
        <circle cx="200" cy="108" r="30" fill="#16a34a"/>
      </g>

      
      <g id="foliageAutumn" class="foliage hidden">
        <circle cx="120" cy="80" r="24" fill="#d97706" opacity="0.95"/>
        <circle cx="140" cy="62" r="26" fill="#ea580c" opacity="0.95"/>
        <circle cx="175" cy="52" r="28" fill="#eab308" opacity="0.95"/>
        <circle cx="218" cy="50" r="29" fill="#ea580c" opacity="0.95"/>
        <circle cx="258" cy="65" r="26" fill="#dc2626" opacity="0.95"/>
        <circle cx="272" cy="90" r="22" fill="#d97706" opacity="0.95"/>
        <circle cx="155" cy="98" r="24" fill="#dc2626" opacity="0.95"/>
        <circle cx="245" cy="100" r="24" fill="#ea580c" opacity="0.95"/>
        <circle cx="200" cy="78" r="30" fill="#f59e0b" opacity="0.95"/>
      </g>

      
      <g id="fallingLeaves" class="falling-leaves hidden">
        <ellipse class="leaf-1" cx="130" cy="110" rx="4.5" ry="2.5" fill="#ea580c"/>
        <ellipse class="leaf-2" cx="245" cy="115" rx="5" ry="3" fill="#dc2626"/>
        <ellipse class="leaf-3" cx="170" cy="120" rx="4.5" ry="2.5" fill="#f59e0b"/>
        <ellipse class="leaf-4" cx="220" cy="125" rx="5" ry="2.8" fill="#d97706"/>
      </g>

      
      <g id="snowAccents" class="snow-accents hidden">
        <path d="M 125 117 Q 145 106, 174 112" stroke="#ffffff" stroke-width="4.5" stroke-linecap="round" fill="none"/>
        <path d="M 122 86 Q 134 89, 148 106" stroke="#ffffff" stroke-width="3.5" stroke-linecap="round" fill="none"/>
        <path d="M 144 63 Q 155 72, 168 94" stroke="#ffffff" stroke-width="4" stroke-linecap="round" fill="none"/>
        <path d="M 188 66 Q 196 85, 198 124" stroke="#ffffff" stroke-width="4.5" stroke-linecap="round" fill="none"/>
        <path d="M 210 118 Q 230 112, 264 126" stroke="#ffffff" stroke-width="4.5" stroke-linecap="round" fill="none"/>
        <path d="M 226 100 Q 235 88, 258 70" stroke="#ffffff" stroke-width="3.5" stroke-linecap="round" fill="none"/>
        <path d="M 240 114 Q 248 102, 274 88" stroke="#ffffff" stroke-width="3.5" stroke-linecap="round" fill="none"/>
        <ellipse cx="196" cy="130" rx="8" ry="3" fill="#ffffff"/>
      </g>
    </svg>
  </div>

  
  <div class="caption-card" id="captionText">
    <span><strong class="caption-highlight">Spring:</strong> Buds open into tender, bright green leaves.</span>
  </div>

  <script>
    const seasons = [
      {
        name: "Spring",
        skyFill: "url(#skySpring)",
        hillFill: "#d1fae5",
        caption: "<strong class='caption-highlight'>Spring:</strong> Buds open into tender, bright green leaves."
      },
      {
        name: "Summer",
        skyFill: "url(#skySummer)",
        hillFill: "#bbf7d0",
        caption: "<strong class='caption-highlight'>Summer:</strong> Full, dense green canopy captures maximum sunlight."
      },
      {
        name: "Autumn",
        skyFill: "url(#skyAutumn)",
        hillFill: "#fed7aa",
        caption: "<strong class='caption-highlight'>Autumn:</strong> Leaves stop making food, turn colorful, and drop."
      },
      {
        name: "Winter",
        skyFill: "url(#skyWinter)",
        hillFill: "#e2e8f0",
        caption: "<strong class='caption-highlight'>Winter:</strong> Bare branches stay dormant to survive the freezing cold."
      }
    ];

    let currentSeason = 0;

    function setSeason(index) {
      currentSeason = index;

      // Update button styles
      for (let i = 0; i < 4; i++) {
        const btn = document.getElementById(`btn-${i}`);
        if (i === index) {
          btn.classList.add('active');
          btn.setAttribute('aria-selected', 'true');
        } else {
          btn.classList.remove('active');
          btn.setAttribute('aria-selected', 'false');
        }
      }

      // Update Sky & Hills
      document.getElementById('skyBg').setAttribute('fill', seasons[index].skyFill);
      document.getElementById('hillBack').setAttribute('fill', seasons[index].hillFill);

      // Update Ground Layers
      const groundLayers = ['groundSpring', 'groundSummer', 'groundAutumn', 'groundWinter'];
      groundLayers.forEach((id, i) => {
        const el = document.getElementById(id);
        if (i === index) {
          el.classList.remove('hidden');
          el.classList.add('visible');
        } else {
          el.classList.remove('visible');
          el.classList.add('hidden');
        }
      });

      // Update Foliage Layers
      const foliageLayers = ['foliageSpring', 'foliageSummer', 'foliageAutumn'];
      foliageLayers.forEach((id, i) => {
        const el = document.getElementById(id);
        if (i === index) {
          el.classList.remove('hidden');
          el.classList.add('visible');
        } else {
          el.classList.remove('visible');
          el.classList.add('hidden');
        }
      });

      // Falling leaves special toggle (Autumn = 2)
      const fallingLeaves = document.getElementById('fallingLeaves');
      if (index === 2) {
        fallingLeaves.classList.remove('hidden');
        fallingLeaves.classList.add('visible');
      } else {
        fallingLeaves.classList.remove('visible');
        fallingLeaves.classList.add('hidden');
      }

      // Winter snow special toggle (Winter = 3)
      const snow = document.getElementById('snowAccents');
      if (index === 3) {
        snow.classList.remove('hidden');
        snow.classList.add('visible');
      } else {
        snow.classList.remove('visible');
        snow.classList.add('hidden');
      }

      // Update Caption
      document.getElementById('captionText').innerHTML = seasons[index].caption;
    }
  </script>
</body>
</html>

science.ks1.y1.t1.s1

Aligned learning resources

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