<!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;
      user-select: none;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: transparent;
      width: 100%;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      padding: 12px;
    }

    .container {
      width: 100%;
      max-width: 680px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .header-text {
      text-align: center;
      font-size: 14px;
      font-weight: 700;
      color: #64748b;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .grid-container {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      width: 100%;
    }

    .strategy-card {
      background: #ffffff;
      border: 1.5px solid #e6e6e6;
      border-radius: 14px;
      padding: 12px 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      cursor: pointer;
      position: relative;
      transition: border-color 0.4s ease, box-shadow 0.4s ease, transform 0.4s ease;
    }

    .strategy-card.active {
      border-color: #22b7ff;
      box-shadow: 0 4px 16px rgba(34, 183, 255, 0.25);
    }

    .card-title {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #1e2945;
    }

    .scene-box {
      width: 100%;
      height: 124px;
      border-radius: 10px;
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      margin-bottom: 8px;
    }

    /* Column 1: Migration */
    .migration-bg {
      background: linear-gradient(180deg, #dbeafe 0%, #ffedd5 100%);
    }

    .north-zone {
      position: absolute;
      top: 8px;
      left: 10px;
      font-size: 16px;
      opacity: 0.9;
    }

    .south-zone {
      position: absolute;
      bottom: 8px;
      right: 10px;
      font-size: 16px;
      display: flex;
      align-items: center;
      gap: 3px;
    }

    .goose-flyer {
      font-size: 28px;
      position: absolute;
      animation: flyTrack 4s ease-in-out infinite;
      z-index: 2;
      filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.15));
    }

    .flight-path {
      position: absolute;
      width: 70px;
      height: 48px;
      border-top: 2px dashed #94a3b8;
      border-right: 2px dashed #94a3b8;
      border-radius: 0 35px 0 0;
      transform: rotate(20deg);
      opacity: 0.7;
    }

    @keyframes flyTrack {
      0%, 100% { transform: translate(-20px, -12px); }
      50% { transform: translate(14px, 10px); }
    }

    /* Column 2: Hibernation */
    .hibernation-bg {
      background: #cbd5e1;
      position: relative;
    }

    .snow-top {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 22px;
      background: #f8fafc;
      border-bottom: 2px solid #94a3b8;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      font-weight: 600;
      color: #64748b;
      gap: 4px;
    }

    .burrow {
      width: 80px;
      height: 80px;
      background: #78350f;
      border-radius: 50%;
      margin-top: 18px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      border: 3px solid #92400e;
      position: relative;
      box-shadow: inset 0 2px 6px rgba(0,0,0,0.3);
    }

    .sleeping-chipmunk {
      font-size: 24px;
      line-height: 1;
    }

    .heart-monitor {
      display: flex;
      align-items: center;
      gap: 3px;
      font-size: 10px;
      font-weight: 600;
      color: #fee2e2;
      margin-top: 3px;
    }

    .pulse-heart {
      color: #ef4444;
      display: inline-block;
      animation: slowPulse 2.5s ease-in-out infinite;
    }

    @keyframes slowPulse {
      0%, 100% { transform: scale(0.9); opacity: 0.7; }
      50% { transform: scale(1.25); opacity: 1; }
    }

    /* Column 3: Adaptation */
    .adaptation-bg {
      transition: background 0.5s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      position: relative;
    }

    .adaptation-bg.summer {
      background: linear-gradient(180deg, #dcfce7 0%, #bbf7d0 100%);
    }

    .adaptation-bg.winter {
      background: linear-gradient(180deg, #e0f2fe 0%, #bae6fd 100%);
    }

    .hare-container {
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      height: 48px;
    }

    .hare-icon {
      font-size: 32px;
      transition: filter 0.5s ease, transform 0.5s ease;
      display: inline-block;
    }

    .hare-icon.summer {
      filter: sepia(1) saturate(3) hue-rotate(330deg) brightness(0.65);
    }

    .hare-icon.winter {
      filter: brightness(1.2) drop-shadow(0 2px 4px rgba(0,0,0,0.15));
    }

    .env-icon {
      position: absolute;
      bottom: 6px;
      left: 8px;
      font-size: 14px;
      transition: all 0.4s ease;
    }

    .toggle-group {
      display: flex;
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
      border-radius: 20px;
      padding: 2px;
      gap: 2px;
      margin-top: 4px;
      width: 100%;
      max-width: 170px;
    }

    .toggle-btn {
      flex: 1;
      border: none;
      background: transparent;
      padding: 4px 6px;
      border-radius: 16px;
      font-size: 11px;
      font-weight: 600;
      color: #64748b;
      cursor: pointer;
      transition: background 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
      white-space: nowrap;
    }

    .toggle-btn.active {
      background: #ffffff;
      color: #1e2945;
      box-shadow: 0 1px 3px rgba(0,0,0,0.12);
    }

    .caption {
      font-size: 12px;
      font-weight: 600;
      color: #64748b;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
      min-height: 18px;
    }

    .description {
      font-size: 11px;
      color: #94a3b8;
      margin-top: 2px;
      line-height: 1.2;
    }

    /* Responsive Mobile Layout */
    @media (max-width: 520px) {
      .grid-container {
        grid-template-columns: 1fr;
        gap: 10px;
      }

      .strategy-card {
        flex-direction: row;
        text-align: left;
        align-items: center;
        padding: 10px 12px;
        gap: 12px;
      }

      .card-info {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: flex-start;
      }

      .card-title {
        margin-bottom: 4px;
        font-size: 14px;
      }

      .scene-box {
        width: 90px;
        height: 80px;
        margin-bottom: 0;
        flex-shrink: 0;
      }

      .burrow {
        width: 56px;
        height: 56px;
        margin-top: 10px;
      }

      .sleeping-chipmunk {
        font-size: 18px;
      }

      .heart-monitor {
        font-size: 8px;
        margin-top: 1px;
      }

      .goose-flyer {
        font-size: 22px;
      }

      .flight-path {
        width: 45px;
        height: 30px;
      }

      .hare-icon {
        font-size: 26px;
      }

      .toggle-group {
        margin-top: 6px;
        max-width: 150px;
      }

      .toggle-btn {
        padding: 3px 5px;
        font-size: 10px;
      }

      .caption {
        justify-content: flex-start;
        font-size: 11px;
      }

      .description {
        font-size: 10px;
      }
    }
  </style>
</head>
<body>

  <div class="container">
    <div class="header-text">Winter Survival Strategies</div>
    <div class="grid-container">
      
      <div class="strategy-card active" id="cardMigration">
        <div class="scene-box migration-bg">
          <div class="north-zone">❄️</div>
          <div class="flight-path"></div>
          <div class="goose-flyer">🪿</div>
          <div class="south-zone">☀️ 🐛</div>
        </div>
        <div class="card-info">
          <div class="card-title">Migration</div>
          <div class="caption">Travel South ➔</div>
          <div class="description">Move to warmer regions with food</div>
        </div>
      </div>

      
      <div class="strategy-card" id="cardHibernation">
        <div class="scene-box hibernation-bg">
          <div class="snow-top">❄️ Snow Layer ❄️</div>
          <div class="burrow">
            <div class="sleeping-chipmunk">🐿️ 💤</div>
            <div class="heart-monitor"><span class="pulse-heart">❤️</span> Slow</div>
          </div>
        </div>
        <div class="card-info">
          <div class="card-title">Hibernation</div>
          <div class="caption">Deep Sleep</div>
          <div class="description">Lower heart rate to save energy</div>
        </div>
      </div>

      
      <div class="strategy-card" id="cardAdaptation">
        <div class="scene-box adaptation-bg winter" id="adaptScene">
          <div class="env-icon" id="envIcon">❄️</div>
          <div class="hare-container">
            <span class="hare-icon winter" id="hareIcon">🐇</span>
          </div>
        </div>
        <div class="card-info">
          <div class="card-title">Body Adaptation</div>
          <div class="caption" id="adaptLabel">Camouflage & Fur</div>
          <div class="toggle-group" id="coatToggle">
            <button class="toggle-btn" id="btnSummer" type="button">☀️ Summer</button>
            <button class="toggle-btn active" id="btnWinter" type="button">❄️ Winter</button>
          </div>
        </div>
      </div>
    </div>
  </div>

  <script>
    const cardMigration = document.getElementById('cardMigration');
    const cardHibernation = document.getElementById('cardHibernation');
    const cardAdaptation = document.getElementById('cardAdaptation');
    const cards = [cardMigration, cardHibernation, cardAdaptation];

    const adaptScene = document.getElementById('adaptScene');
    const hareIcon = document.getElementById('hareIcon');
    const envIcon = document.getElementById('envIcon');
    const adaptLabel = document.getElementById('adaptLabel');
    const btnSummer = document.getElementById('btnSummer');
    const btnWinter = document.getElementById('btnWinter');
    const coatToggle = document.getElementById('coatToggle');

    function selectCard(selected) {
      cards.forEach(card => {
        if (card === selected) {
          card.classList.add('active');
        } else {
          card.classList.remove('active');
        }
      });
    }

    cards.forEach(card => {
      card.addEventListener('click', (e) => {
        if (!coatToggle.contains(e.target)) {
          selectCard(card);
        }
      });
    });

    function setCoat(isWinter) {
      if (isWinter) {
        adaptScene.className = 'scene-box adaptation-bg winter';
        hareIcon.className = 'hare-icon winter';
        envIcon.textContent = '❄️';
        adaptLabel.textContent = 'White Winter Coat (Snow)';
        btnWinter.classList.add('active');
        btnSummer.classList.remove('active');
      } else {
        adaptScene.className = 'scene-box adaptation-bg summer';
        hareIcon.className = 'hare-icon summer';
        envIcon.textContent = '🌱';
        adaptLabel.textContent = 'Brown Summer Coat (Dirt)';
        btnSummer.classList.add('active');
        btnWinter.classList.remove('active');
      }
    }

    btnSummer.addEventListener('click', (e) => {
      e.stopPropagation();
      selectCard(cardAdaptation);
      setCoat(false);
    });

    btnWinter.addEventListener('click', (e) => {
      e.stopPropagation();
      selectCard(cardAdaptation);
      setCoat(true);
    });
  </script>
</body>
</html>

Natural Environmental Changes Across Seasons

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>African Savanna: Seasonal Comparison</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      user-select: none;
      -webkit-user-select: none;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      color: #1e2945;
      background: transparent;
      padding: 10px 8px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
      width: 100%;
      max-width: 560px;
      margin: 0 auto;
    }

    .toolbar {
      display: flex;
      gap: 8px;
      width: 100%;
      justify-content: center;
    }

    .btn {
      flex: 1;
      padding: 7px 10px;
      font-size: 12px;
      font-weight: 700;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      background: #ffffff;
      color: #1e2945;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
      transition: background-color 0.2s, border-color 0.2s, color 0.2s, box-shadow 0.2s;
    }

    .btn:hover {
      background: #f8fafc;
      border-color: #cbd5e1;
    }

    .btn.active-wet {
      background: #f0fdf4;
      border-color: #22c55e;
      color: #15803d;
      box-shadow: 0 0 0 1px #22c55e;
    }

    .btn.active-split {
      background: #f1f5f9;
      border-color: #64748b;
      color: #0f172a;
      box-shadow: 0 0 0 1px #64748b;
    }

    .btn.active-dry {
      background: #fefce8;
      border-color: #eab308;
      color: #a16207;
      box-shadow: 0 0 0 1px #eab308;
    }

    .compare-stage {
      position: relative;
      width: 100%;
      aspect-ratio: 16 / 10;
      min-height: 220px;
      max-height: 350px;
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid #e2e8f0;
      touch-action: none;
      cursor: ew-resize;
      background: #f8fafc;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    }

    .scene {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
    }

    .scene-wet {
      clip-path: inset(0 calc(100% - var(--split, 50%)) 0 0);
    }

    .divider {
      position: absolute;
      top: 0;
      bottom: 0;
      left: var(--split, 50%);
      width: 3px;
      background: #ffffff;
      box-shadow: 0 0 8px rgba(0, 0, 0, 0.35);
      transform: translateX(-50%);
      pointer-events: none;
    }

    .handle {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 30px;
      height: 30px;
      background: #ffffff;
      border: 2px solid #cbd5e1;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      font-weight: 800;
      color: #475569;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    }

    .badge {
      position: absolute;
      top: 8px;
      padding: 4px 9px;
      font-size: 11px;
      font-weight: 700;
      border-radius: 20px;
      letter-spacing: 0.2px;
      pointer-events: none;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
      z-index: 5;
    }
    .badge-wet { left: 8px; background: rgba(22, 163, 74, 0.94); color: #ffffff; }
    .badge-dry { right: 8px; background: rgba(217, 119, 6, 0.94); color: #ffffff; }

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

    .tag-label {
      font-size: 9.5px;
      font-weight: 800;
      fill: #1e2945;
      paint-order: stroke fill;
      stroke: #ffffff;
      stroke-width: 3px;
      stroke-linejoin: round;
      letter-spacing: 0.1px;
    }

    .sub-label {
      font-size: 8px;
      font-weight: 700;
      fill: #475569;
      paint-order: stroke fill;
      stroke: #ffffff;
      stroke-width: 2.5px;
      stroke-linejoin: round;
    }

    .helper-hint {
      font-size: 11px;
      color: #64748b;
      font-weight: 500;
      text-align: center;
    }

    @media (max-width: 400px) {
      .btn {
        font-size: 11px;
        padding: 5px 6px;
      }
      .badge {
        font-size: 10px;
        padding: 3px 7px;
      }
    }
  </style>
</head>
<body>

  <div class="toolbar">
    <button class="btn" id="btnWet" onclick="setPos(100)">🌧️ Wet Season</button>
    <button class="btn active-split" id="btnSplit" onclick="setPos(50)">↔️ Compare</button>
    <button class="btn" id="btnDry" onclick="setPos(0)">☀️ Dry Season</button>
  </div>

  <div class="compare-stage" id="stage">
    
    <div class="scene scene-dry">
      <svg viewBox="0 0 400 250" preserveAspectRatio="none">
        <defs>
          <linearGradient id="drySky" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stop-color="#fed7aa"/>
            <stop offset="50%" stop-color="#ffedd5"/>
            <stop offset="100%" stop-color="#fef3c7"/>
          </linearGradient>
          <linearGradient id="dryGround" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stop-color="#d97706"/>
            <stop offset="40%" stop-color="#b45309"/>
            <stop offset="100%" stop-color="#78350f"/>
          </linearGradient>
          <linearGradient id="sunGlow" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stop-color="#fef08a" stop-opacity="0.8"/>
            <stop offset="100%" stop-color="#fbbf24" stop-opacity="0"/>
          </linearGradient>
        </defs>

        
        <rect width="400" height="145" fill="url(#drySky)"/>

        
        <circle cx="250" cy="38" r="28" fill="url(#sunGlow)"/>
        <circle cx="250" cy="38" r="14" fill="#fbbf24"/>

        
        <g opacity="0.9">
          <ellipse cx="355" cy="112" rx="26" ry="10" fill="#64748b"/>
          <ellipse cx="368" cy="108" rx="15" ry="8" fill="#94a3b8"/>
          <ellipse cx="345" cy="110" rx="14" ry="7" fill="#94a3b8"/>
          
          <path d="M 342 120 L 338 130 M 350 120 L 346 130 M 358 120 L 354 130 M 366 120 L 362 130" stroke="#38bdf8" stroke-width="1.2" stroke-dasharray="2,2"/>
          <text x="355" y="96" text-anchor="middle" class="sub-label">Distant Rain</text>
        </g>

        
        <path d="M 0 135 Q 120 128, 240 135 T 400 135 L 400 250 L 0 250 Z" fill="url(#dryGround)"/>

        
        <g stroke="#92400e" stroke-width="1.5" stroke-linecap="round">
          <path d="M 215 155 L 212 145 M 215 155 L 217 146"/>
          <path d="M 275 160 L 272 150 M 275 160 L 278 152"/>
          <path d="M 380 155 L 378 147 M 380 155 L 383 148"/>
          <path d="M 230 235 L 227 225 M 230 235 L 233 226"/>
          <path d="M 370 235 L 367 225 M 370 235 L 373 226"/>
        </g>

        
        <g stroke="#451a03" stroke-linecap="round">
          <path d="M 240 195 L 240 142" stroke-width="5"/>
          <path d="M 240 158 Q 222 142, 215 132" stroke-width="3" fill="none"/>
          <path d="M 240 154 Q 256 138, 266 128" stroke-width="3" fill="none"/>
          <path d="M 240 142 L 240 124" stroke-width="2.5" fill="none"/>
          <path d="M 215 132 L 208 124 M 215 132 L 218 122" stroke-width="1.8"/>
          <path d="M 266 128 L 274 120 M 266 128 L 262 118" stroke-width="1.8"/>
        </g>
        <text x="240" y="112" text-anchor="middle" class="tag-label">Bare Tree</text>

        
        <ellipse cx="325" cy="190" rx="48" ry="20" fill="#78350f" stroke="#451a03" stroke-width="2"/>
        
        <path d="M 295 190 L 312 188 L 325 197 L 342 188 L 358 192 M 312 188 L 316 179 M 325 197 L 327 206 M 342 188 L 347 179" stroke="#3b1502" stroke-width="1.5" fill="none"/>
        <text x="325" y="193" text-anchor="middle" class="tag-label">Dry Pond Bed</text>

        
        <g fill="#451a03" opacity="0.65">
          <circle cx="265" cy="172" r="1.8"/><circle cx="269" cy="169" r="1.4"/>
          <circle cx="285" cy="162" r="1.7"/><circle cx="289" cy="159" r="1.3"/>
          <circle cx="305" cy="153" r="1.6"/><circle cx="309" cy="150" r="1.2"/>
          <circle cx="325" cy="144" r="1.5"/><circle cx="329" cy="141" r="1.1"/>
        </g>

        
        <text x="295" y="148" text-anchor="middle" class="tag-label">Migration ➔</text>

        
        <text x="338" y="136" font-size="14">🐘</text>
        <text x="362" y="138" font-size="11">🦓</text>
      </svg>
    </div>

    
    <div class="scene scene-wet">
      <svg viewBox="0 0 400 250" preserveAspectRatio="none">
        <defs>
          <linearGradient id="wetSky" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stop-color="#60a5fa"/>
            <stop offset="50%" stop-color="#93c5fd"/>
            <stop offset="100%" stop-color="#dbeafe"/>
          </linearGradient>
          <linearGradient id="wetGround" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stop-color="#4ade80"/>
            <stop offset="40%" stop-color="#22c55e"/>
            <stop offset="100%" stop-color="#15803d"/>
          </linearGradient>
          <linearGradient id="waterPool" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stop-color="#38bdf8"/>
            <stop offset="100%" stop-color="#0284c7"/>
          </linearGradient>
        </defs>

        
        <rect width="400" height="145" fill="url(#wetSky)"/>

        
        <g opacity="0.95">
          <ellipse cx="125" cy="38" rx="28" ry="14" fill="#cbd5e1"/>
          <ellipse cx="145" cy="34" rx="18" ry="11" fill="#f1f5f9"/>
          <ellipse cx="105" cy="37" rx="16" ry="10" fill="#e2e8f0"/>
          <path d="M 100 52 L 95 65 M 112 52 L 107 65 M 124 52 L 119 65 M 138 52 L 133 65 M 150 52 L 145 65" stroke="#38bdf8" stroke-width="1.8" stroke-dasharray="3,3"/>
          <text x="125" y="78" text-anchor="middle" class="sub-label">Heavy Rainfall</text>
        </g>

        
        <path d="M 0 135 Q 120 128, 240 135 T 400 135 L 400 250 L 0 250 Z" fill="url(#wetGround)"/>

        
        <g>
          <path d="M 65 195 L 65 142" stroke="#451a03" stroke-width="5" stroke-linecap="round"/>
          <ellipse cx="65" cy="122" rx="46" ry="16" fill="#15803d"/>
          <ellipse cx="45" cy="126" rx="24" ry="12" fill="#16a34a"/>
          <ellipse cx="85" cy="126" rx="24" ry="12" fill="#16a34a"/>
          <ellipse cx="65" cy="115" rx="30" ry="10" fill="#22c55e"/>
          
          <circle cx="42" cy="122" r="2.2" fill="#facc15"/>
          <circle cx="58" cy="114" r="2.2" fill="#facc15"/>
          <circle cx="76" cy="116" r="2.2" fill="#facc15"/>
          <circle cx="88" cy="124" r="2.2" fill="#facc15"/>
        </g>
        <text x="65" y="98" text-anchor="middle" class="tag-label">Lush Canopy</text>

        
        <ellipse cx="142" cy="190" rx="46" ry="20" fill="url(#waterPool)" stroke="#bae6fd" stroke-width="2"/>
        <ellipse cx="135" cy="185" rx="28" ry="8" fill="#7dd3fc" opacity="0.65"/>
        <text x="142" y="193" text-anchor="middle" class="tag-label">Full Waterhole</text>

        
        <path d="M 98 185 L 96 172 M 102 187 L 103 170 M 184 186 L 182 173 M 188 188 L 190 171" stroke="#166534" stroke-width="2" stroke-linecap="round"/>

        
        <g stroke="#15803d" stroke-width="1.8" stroke-linecap="round">
          <path d="M 20 160 L 16 148 M 20 160 L 23 150"/>
          <path d="M 30 230 L 27 218 M 30 230 L 33 220"/>
          <path d="M 90 235 L 87 222 M 90 235 L 94 224"/>
        </g>

        
        <text x="22" y="192" font-size="20">🦒</text>
        <text x="100" y="172" font-size="18">🦓</text>
        <text x="162" y="178" font-size="20">🐘</text>
        <text x="50" y="215" text-anchor="middle" class="tag-label">Abundant Food</text>
      </svg>
    </div>

    
    <div class="divider">
      <div class="handle">◀ ▶</div>
    </div>

    
    <div class="badge badge-wet">🌧️ Wet Season</div>
    <div class="badge badge-dry">☀️ Dry Season</div>
  </div>

  <div class="helper-hint">↔ Drag the slider or use buttons to compare habitat adaptations</div>

  <script>
    const stage = document.getElementById('stage');
    const btnWet = document.getElementById('btnWet');
    const btnSplit = document.getElementById('btnSplit');
    const btnDry = document.getElementById('btnDry');

    let currentPos = 50;
    let isDragging = false;

    function setPos(pos) {
      currentPos = Math.max(0, Math.min(100, pos));
      stage.style.setProperty('--split', currentPos + '%');
      
      btnWet.className = 'btn' + (currentPos >= 85 ? ' active-wet' : '');
      btnSplit.className = 'btn' + (currentPos > 15 && currentPos < 85 ? ' active-split' : '');
      btnDry.className = 'btn' + (currentPos <= 15 ? ' active-dry' : '');
    }

    function updateFromEvent(e) {
      const rect = stage.getBoundingClientRect();
      const clientX = e.touches ? e.touches[0].clientX : e.clientX;
      const x = clientX - rect.left;
      const pct = (x / rect.width) * 100;
      setPos(pct);
    }

    stage.addEventListener('pointerdown', (e) => {
      isDragging = true;
      stage.setPointerCapture(e.pointerId);
      updateFromEvent(e);
    });

    stage.addEventListener('pointermove', (e) => {
      if (isDragging) updateFromEvent(e);
    });

    stage.addEventListener('pointerup', (e) => {
      isDragging = false;
      try { stage.releasePointerCapture(e.pointerId); } catch(err) {}
    });

    stage.addEventListener('pointercancel', () => {
      isDragging = false;
    });

    // Initialize at 50% split view
    setPos(50);
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="1:1">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: transparent;
      padding: 10px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      user-select: none;
      -webkit-user-select: none;
    }

    .grid-seasons {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 8px;
      width: 100%;
    }

    .season-card {
      background: #ffffff;
      border: 2px solid #e2e8f0;
      border-radius: 12px;
      padding: 8px;
      display: flex;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      transition: border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
      position: relative;
    }

    .season-card.active {
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
    }

    .season-card[data-season="spring"].active {
      border-color: #16a34a;
      background: #f0fdf4;
    }
    .season-card[data-season="summer"].active {
      border-color: #d97706;
      background: #fffbeb;
    }
    .season-card[data-season="autumn"].active {
      border-color: #ea580c;
      background: #fff7ed;
    }
    .season-card[data-season="winter"].active {
      border-color: #0284c7;
      background: #f0f9ff;
    }

    .card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 700;
      font-size: 15px;
    }

    .badge {
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      padding: 2px 6px;
      border-radius: 6px;
      letter-spacing: 0.5px;
    }

    [data-season="spring"] .badge { background: #dcfce7; color: #15803d; }
    [data-season="summer"] .badge { background: #fef3c7; color: #b45309; }
    [data-season="autumn"] .badge { background: #ffedd5; color: #c2410c; }
    [data-season="winter"] .badge { background: #e0f2fe; color: #0369a1; }

    .visual-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 6px;
    }

    .tree-box {
      width: 54px;
      height: 54px;
      flex-shrink: 0;
    }

    .tree-box svg {
      width: 100%;
      height: 100%;
      display: block;
    }

    .meters-col {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .meter-item {
      display: flex;
      align-items: center;
      gap: 5px;
      font-size: 12px;
      font-weight: 600;
      color: #475569;
    }

    .meter-icon {
      font-size: 13px;
      width: 16px;
      text-align: center;
      line-height: 1;
    }

    .bar-bg {
      flex: 1;
      height: 6px;
      background: #e2e8f0;
      border-radius: 3px;
      overflow: hidden;
    }

    .bar-fill {
      height: 100%;
      border-radius: 3px;
      transition: width 0.3s ease;
    }

    .meter-val {
      font-size: 11px;
      font-weight: 700;
      min-width: 32px;
      text-align: right;
      color: #1e2945;
    }

    /* Summary Bar */
    .summary-bar {
      background: #ffffff;
      border: 2px solid #e2e8f0;
      border-radius: 12px;
      padding: 10px 14px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
    }

    .summary-text {
      font-size: 14px;
      font-weight: 600;
      color: #1e2945;
      line-height: 1.3;
    }

    .controls {
      display: flex;
      align-items: center;
      gap: 6px;
      flex-shrink: 0;
    }

    .ctrl-btn {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      color: #1e2945;
      border-radius: 8px;
      padding: 4px 10px;
      font-size: 13px;
      font-weight: 700;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .ctrl-btn:active {
      background: #e2e8f0;
    }

    @media (min-width: 520px) {
      .grid-seasons {
        grid-template-columns: repeat(4, 1fr);
      }
      .visual-row {
        flex-direction: column;
        align-items: stretch;
      }
      .tree-box {
        align-self: center;
        width: 64px;
        height: 64px;
      }
    }
  </style>
</head>
<body>

  <div class="grid-seasons">
    
    <div class="season-card active" data-season="spring" data-index="0">
      <div class="card-header">
        <span>🌸 Spring</span>
        <span class="badge">Warm</span>
      </div>
      <div class="visual-row">
        <div class="tree-box">
          <svg viewBox="0 0 60 60">
            
            <rect x="27" y="32" width="6" height="24" rx="2" fill="#854d0e"/>
            
            <circle cx="30" cy="24" r="16" fill="#86efac"/>
            <circle cx="23" cy="22" r="11" fill="#4ade80"/>
            <circle cx="37" cy="22" r="11" fill="#4ade80"/>
            <circle cx="30" cy="14" r="10" fill="#22c55e"/>
            
            <circle cx="21" cy="18" r="2.5" fill="#f472b6"/>
            <circle cx="38" cy="20" r="2.5" fill="#f472b6"/>
            <circle cx="29" cy="12" r="2.5" fill="#f472b6"/>
            <circle cx="32" cy="26" r="2.5" fill="#f472b6"/>
          </svg>
        </div>
        <div class="meters-col">
          <div class="meter-item">
            <span class="meter-icon">🌡️</span>
            <div class="bar-bg"><div class="bar-fill" style="width: 55%; background: #22c55e;"></div></div>
            <span class="meter-val">14°C</span>
          </div>
          <div class="meter-item">
            <span class="meter-icon">☀️</span>
            <div class="bar-bg"><div class="bar-fill" style="width: 50%; background: #eab308;"></div></div>
            <span class="meter-val">12 hrs</span>
          </div>
          <div class="meter-item">
            <span class="meter-icon">💧</span>
            <div class="bar-bg"><div class="bar-fill" style="width: 60%; background: #0284c7;"></div></div>
            <span class="meter-val">Showers</span>
          </div>
        </div>
      </div>
    </div>

    
    <div class="season-card" data-season="summer" data-index="1">
      <div class="card-header">
        <span>☀️ Summer</span>
        <span class="badge">Hot</span>
      </div>
      <div class="visual-row">
        <div class="tree-box">
          <svg viewBox="0 0 60 60">
            
            <rect x="27" y="32" width="6" height="24" rx="2" fill="#713f12"/>
            
            <circle cx="30" cy="24" r="18" fill="#16a34a"/>
            <circle cx="21" cy="22" r="13" fill="#15803d"/>
            <circle cx="39" cy="22" r="13" fill="#15803d"/>
            <circle cx="30" cy="13" r="12" fill="#166534"/>
            <circle cx="25" cy="28" r="4" fill="#22c55e"/>
            <circle cx="35" cy="27" r="4" fill="#22c55e"/>
          </svg>
        </div>
        <div class="meters-col">
          <div class="meter-item">
            <span class="meter-icon">🌡️</span>
            <div class="bar-bg"><div class="bar-fill" style="width: 90%; background: #ea580c;"></div></div>
            <span class="meter-val">24°C</span>
          </div>
          <div class="meter-item">
            <span class="meter-icon">☀️</span>
            <div class="bar-bg"><div class="bar-fill" style="width: 85%; background: #eab308;"></div></div>
            <span class="meter-val">16 hrs</span>
          </div>
          <div class="meter-item">
            <span class="meter-icon">💧</span>
            <div class="bar-bg"><div class="bar-fill" style="width: 30%; background: #0284c7;"></div></div>
            <span class="meter-val">Dry</span>
          </div>
        </div>
      </div>
    </div>

    
    <div class="season-card" data-season="autumn" data-index="2">
      <div class="card-header">
        <span>🍂 Autumn</span>
        <span class="badge">Cool</span>
      </div>
      <div class="visual-row">
        <div class="tree-box">
          <svg viewBox="0 0 60 60">
            
            <rect x="27" y="32" width="6" height="24" rx="2" fill="#78350f"/>
            
            <circle cx="30" cy="24" r="16" fill="#ea580c"/>
            <circle cx="22" cy="23" r="11" fill="#d97706"/>
            <circle cx="38" cy="23" r="11" fill="#b45309"/>
            <circle cx="30" cy="14" r="10" fill="#dc2626"/>
            
            <circle cx="16" cy="40" r="2.5" fill="#ea580c"/>
            <circle cx="43" cy="44" r="2.5" fill="#d97706"/>
            <circle cx="20" cy="50" r="2" fill="#b45309"/>
          </svg>
        </div>
        <div class="meters-col">
          <div class="meter-item">
            <span class="meter-icon">🌡️</span>
            <div class="bar-bg"><div class="bar-fill" style="width: 45%; background: #d97706;"></div></div>
            <span class="meter-val">11°C</span>
          </div>
          <div class="meter-item">
            <span class="meter-icon">☀️</span>
            <div class="bar-bg"><div class="bar-fill" style="width: 40%; background: #eab308;"></div></div>
            <span class="meter-val">10 hrs</span>
          </div>
          <div class="meter-item">
            <span class="meter-icon">💧</span>
            <div class="bar-bg"><div class="bar-fill" style="width: 75%; background: #0284c7;"></div></div>
            <span class="meter-val">Rainy</span>
          </div>
        </div>
      </div>
    </div>

    
    <div class="season-card" data-season="winter" data-index="3">
      <div class="card-header">
        <span>❄️ Winter</span>
        <span class="badge">Cold</span>
      </div>
      <div class="visual-row">
        <div class="tree-box">
          <svg viewBox="0 0 60 60">
            
            <rect x="28" y="26" width="5" height="30" rx="1.5" fill="#52525b"/>
            
            <line x1="29" y1="36" x2="18" y2="24" stroke="#52525b" stroke-width="3" stroke-linecap="round"/>
            <line x1="18" y1="24" x2="14" y2="16" stroke="#52525b" stroke-width="2" stroke-linecap="round"/>
            <line x1="31" y1="34" x2="42" y2="22" stroke="#52525b" stroke-width="3" stroke-linecap="round"/>
            <line x1="42" y1="22" x2="46" y2="14" stroke="#52525b" stroke-width="2" stroke-linecap="round"/>
            <line x1="30" y1="26" x2="28" y2="14" stroke="#52525b" stroke-width="2.5" stroke-linecap="round"/>
            
            <ellipse cx="18" cy="23" rx="4" ry="2" fill="#e0f2fe"/>
            <ellipse cx="42" cy="21" rx="4" ry="2" fill="#e0f2fe"/>
            <ellipse cx="30" cy="54" rx="20" ry="4" fill="#bae6fd"/>
          </svg>
        </div>
        <div class="meters-col">
          <div class="meter-item">
            <span class="meter-icon">🌡️</span>
            <div class="bar-bg"><div class="bar-fill" style="width: 15%; background: #0284c7;"></div></div>
            <span class="meter-val">2°C</span>
          </div>
          <div class="meter-item">
            <span class="meter-icon">☀️</span>
            <div class="bar-bg"><div class="bar-fill" style="width: 25%; background: #eab308;"></div></div>
            <span class="meter-val">8 hrs</span>
          </div>
          <div class="meter-item">
            <span class="meter-icon">❄️</span>
            <div class="bar-bg"><div class="bar-fill" style="width: 80%; background: #38bdf8;"></div></div>
            <span class="meter-val">Snow</span>
          </div>
        </div>
      </div>
    </div>
  </div>

  
  <div class="summary-bar">
    <div class="summary-text" id="summaryText">🌱 <b>Spring:</b> Buds sprout & animals wake up from the cold!</div>
    <div class="controls">
      <button class="ctrl-btn" id="prevBtn" title="Previous Season">◀</button>
      <button class="ctrl-btn" id="playBtn" title="Auto Play / Pause">⏸</button>
      <button class="ctrl-btn" id="nextBtn" title="Next Season">▶</button>
    </div>
  </div>

  <script>
    const summaries = [
      "🌱 <b>Spring:</b> Buds sprout & animals wake up from the cold!",
      "☀️ <b>Summer:</b> Long sunny days & trees in full lush green!",
      "🍁 <b>Autumn:</b> Leaves turn orange & fall to save tree water!",
      "❄️ <b>Winter:</b> Short cold days; bare trees & hibernating animals!"
    ];

    const cards = document.querySelectorAll('.season-card');
    const summaryText = document.getElementById('summaryText');
    const prevBtn = document.getElementById('prevBtn');
    const nextBtn = document.getElementById('nextBtn');
    const playBtn = document.getElementById('playBtn');

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

    function setSeason(index) {
      currentIndex = (index + 4) % 4;
      cards.forEach((c, idx) => {
        c.classList.toggle('active', idx === currentIndex);
      });
      summaryText.innerHTML = summaries[currentIndex];
    }

    function startTimer() {
      if (timer) clearInterval(timer);
      timer = setInterval(() => {
        setSeason(currentIndex + 1);
      }, 3500);
    }

    function stopTimer() {
      if (timer) {
        clearInterval(timer);
        timer = null;
      }
    }

    cards.forEach((card, i) => {
      card.addEventListener('click', () => {
        setSeason(i);
        if (isPlaying) {
          stopTimer();
          startTimer();
        }
      });
    });

    prevBtn.addEventListener('click', () => {
      setSeason(currentIndex - 1);
      if (isPlaying) startTimer();
    });

    nextBtn.addEventListener('click', () => {
      setSeason(currentIndex + 1);
      if (isPlaying) startTimer();
    });

    playBtn.addEventListener('click', () => {
      isPlaying = !isPlaying;
      playBtn.textContent = isPlaying ? '⏸' : '▶';
      if (isPlaying) {
        startTimer();
      } else {
        stopTimer();
      }
    });

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

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

    .timeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 8px;
      width: 100%;
      max-width: 640px;
    }

    @media (max-width: 480px) {
      .timeline-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    .stage-card {
      background: #ffffff;
      border: 2px solid #e2e8f0;
      border-radius: 12px;
      padding: 8px 6px 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      cursor: pointer;
      position: relative;
      transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
      user-select: none;
    }

    .stage-card.active {
      border-color: #22b7ff;
      box-shadow: 0 0 0 3px rgba(34, 183, 255, 0.25), 0 4px 12px rgba(34, 183, 255, 0.15);
      animation: pulseGlow 2.5s infinite alternate ease-in-out;
    }

    @keyframes pulseGlow {
      0% { box-shadow: 0 0 0 2px rgba(34, 183, 255, 0.2), 0 2px 8px rgba(34, 183, 255, 0.1); }
      100% { box-shadow: 0 0 0 5px rgba(34, 183, 255, 0.35), 0 6px 16px rgba(34, 183, 255, 0.25); }
    }

    .season-name {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 4px;
    }

    .season-1 { color: #16a34a; }
    .season-2 { color: #0284c7; }
    .season-3 { color: #d97706; }
    .season-4 { color: #475569; }

    .svg-wrap {
      width: 100%;
      max-width: 120px;
      aspect-ratio: 1 / 1;
      margin: 2px 0 6px;
    }

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

    .label-pill {
      font-size: 11px;
      font-weight: 600;
      padding: 3px 6px;
      border-radius: 6px;
      background: #f1f5f9;
      color: #1e2945;
      line-height: 1.2;
      min-height: 28px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .stage-card.active .label-pill {
      background: #e0f2fe;
      color: #0369a1;
      font-weight: 700;
    }

    .controls {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      margin-top: 10px;
    }

    .btn {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      color: #1e2945;
      font-size: 13px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 20px;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 4px;
      transition: background 0.2s;
    }

    .btn:hover {
      background: #f1f5f9;
    }

    .dots {
      display: flex;
      gap: 6px;
    }

    .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #cbd5e1;
      cursor: pointer;
      transition: background 0.3s ease, transform 0.2s ease;
    }

    .dot.active {
      background: #22b7ff;
      transform: scale(1.25);
    }
  </style>
</head>
<body>

  <div class="timeline-grid">
    
    <div class="stage-card active" data-step="0" onclick="setStep(0)">
      <div class="season-name season-1">Spring</div>
      <div class="svg-wrap">
        <svg viewBox="0 0 100 100">
          <ellipse cx="50" cy="90" rx="35" ry="6" fill="#86efac" opacity="0.6"/>
          
          <path d="M48 90 L48 55 Q40 45 32 38 M48 55 Q55 42 68 35 M48 60 Q35 55 24 50 M52 50 Q60 48 74 48" stroke="#78350f" stroke-width="4.5" stroke-linecap="round" fill="none"/>
          
          <circle cx="32" cy="38" r="3.5" fill="#4ade80"/>
          <circle cx="28" cy="34" r="2.5" fill="#86efac"/>
          <circle cx="68" cy="35" r="3.5" fill="#4ade80"/>
          <circle cx="72" cy="32" r="2.5" fill="#86efac"/>
          <circle cx="24" cy="50" r="3" fill="#4ade80"/>
          <circle cx="74" cy="48" r="3" fill="#4ade80"/>
          <circle cx="48" cy="42" r="3" fill="#86efac"/>
          
          <circle cx="35" cy="42" r="2" fill="#f472b6"/>
          <circle cx="64" cy="40" r="2" fill="#f472b6"/>
          <circle cx="50" cy="35" r="2.5" fill="#f472b6"/>
          
          <circle cx="82" cy="18" r="7" fill="#fde047"/>
          <path d="M82 7 L82 9 M82 27 L82 29 M71 18 L73 18 M91 18 L93 18" stroke="#facc15" stroke-width="1.5" stroke-linecap="round"/>
        </svg>
      </div>
      <div class="label-pill">Waking Up</div>
    </div>

    
    <div class="stage-card" data-step="1" onclick="setStep(1)">
      <div class="season-name season-2">Summer</div>
      <div class="svg-wrap">
        <svg viewBox="0 0 100 100">
          <ellipse cx="50" cy="90" rx="35" ry="6" fill="#4ade80" opacity="0.6"/>
          
          <path d="M47 90 L47 60 L53 60 L53 90 Z" fill="#78350f"/>
          
          <circle cx="50" cy="42" r="24" fill="#15803d"/>
          <circle cx="36" cy="46" r="18" fill="#16a34a"/>
          <circle cx="64" cy="46" r="18" fill="#16a34a"/>
          <circle cx="50" cy="32" r="19" fill="#22c55e"/>
          <circle cx="40" cy="36" r="14" fill="#4ade80" opacity="0.4"/>
          
          <circle cx="84" cy="16" r="9" fill="#fbbf24"/>
          <path d="M84 4 L84 6 M84 26 L84 28 M72 16 L74 16 M94 16 L96 16 M75 7 L77 9 M91 23 L93 25 M75 25 L77 23 M91 9 L93 7" stroke="#f59e0b" stroke-width="2" stroke-linecap="round"/>
        </svg>
      </div>
      <div class="label-pill">Growing Fast</div>
    </div>

    
    <div class="stage-card" data-step="2" onclick="setStep(2)">
      <div class="season-name season-3">Fall</div>
      <div class="svg-wrap">
        <svg viewBox="0 0 100 100">
          <ellipse cx="50" cy="90" rx="35" ry="6" fill="#fcd34d" opacity="0.5"/>
          
          <path d="M48 90 L48 55 Q40 45 32 38 M48 55 Q55 42 68 35 M48 60 Q35 55 24 50 M52 50 Q60 48 74 48" stroke="#78350f" stroke-width="4" stroke-linecap="round" fill="none"/>
          
          <circle cx="48" cy="40" r="16" fill="#ea580c" opacity="0.85"/>
          <circle cx="62" cy="44" r="13" fill="#d97706" opacity="0.85"/>
          <circle cx="36" cy="45" r="12" fill="#dc2626" opacity="0.8"/>
          
          <ellipse cx="26" cy="65" rx="3" ry="1.5" fill="#ea580c" transform="rotate(25 26 65)"/>
          <ellipse cx="68" cy="62" rx="3" ry="1.5" fill="#d97706" transform="rotate(-30 68 62)"/>
          <ellipse cx="44" cy="72" rx="3" ry="1.5" fill="#dc2626" transform="rotate(45 44 72)"/>
          
          <ellipse cx="32" cy="90" rx="4" ry="1.5" fill="#ea580c"/>
          <ellipse cx="60" cy="91" rx="4" ry="1.5" fill="#d97706"/>
          <ellipse cx="46" cy="89" rx="3" ry="1" fill="#b45309"/>
        </svg>
      </div>
      <div class="label-pill">Saving Energy</div>
    </div>

    
    <div class="stage-card" data-step="3" onclick="setStep(3)">
      <div class="season-name season-4">Winter</div>
      <div class="svg-wrap">
        <svg viewBox="0 0 100 100">
          
          <ellipse cx="50" cy="90" rx="36" ry="6" fill="#e2e8f0"/>
          <ellipse cx="50" cy="91" rx="32" ry="4" fill="#f8fafc"/>
          
          <path d="M48 90 L48 55 Q38 42 28 34 M48 55 Q56 40 72 32 M48 62 Q32 54 20 48 M52 50 Q62 46 78 46 M38 42 Q40 32 46 26" stroke="#475569" stroke-width="4" stroke-linecap="round" fill="none"/>
          
          <path d="M38 41 Q40 33 45 27" stroke="#ffffff" stroke-width="2" stroke-linecap="round" fill="none"/>
          <path d="M50 56 Q56 42 68 34" stroke="#ffffff" stroke-width="2" stroke-linecap="round" fill="none"/>
          
          <circle cx="25" cy="22" r="1.5" fill="#93c5fd"/>
          <circle cx="75" cy="20" r="1.5" fill="#93c5fd"/>
          <circle cx="35" cy="38" r="1.2" fill="#93c5fd"/>
          <circle cx="68" cy="52" r="1.2" fill="#93c5fd"/>
          <circle cx="82" cy="38" r="1.5" fill="#93c5fd"/>
          <circle cx="20" cy="62" r="1.2" fill="#93c5fd"/>
        </svg>
      </div>
      <div class="label-pill">Deep Sleep</div>
    </div>
  </div>

  <div class="controls">
    <button class="btn" id="playBtn" onclick="togglePlay()">
      <span id="playIcon">⏸</span> Pause
    </button>
    <div class="dots">
      <div class="dot active" onclick="setStep(0)"></div>
      <div class="dot" onclick="setStep(1)"></div>
      <div class="dot" onclick="setStep(2)"></div>
      <div class="dot" onclick="setStep(3)"></div>
    </div>
  </div>

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

    const cards = document.querySelectorAll('.stage-card');
    const dots = document.querySelectorAll('.dot');
    const playIcon = document.getElementById('playIcon');
    const playBtn = document.getElementById('playBtn');

    function updateView() {
      cards.forEach((c, i) => c.classList.toggle('active', i === currentStep));
      dots.forEach((d, i) => d.classList.toggle('active', i === currentStep));
    }

    function setStep(index) {
      currentStep = index;
      updateView();
      if (isPlaying) resetTimer();
    }

    function nextStep() {
      currentStep = (currentStep + 1) % 4;
      updateView();
    }

    function resetTimer() {
      if (timer) clearInterval(timer);
      timer = setInterval(nextStep, 3200);
    }

    function togglePlay() {
      isPlaying = !isPlaying;
      if (isPlaying) {
        playIcon.textContent = '⏸';
        playBtn.childNodes[2].nodeValue = ' Pause';
        resetTimer();
      } else {
        playIcon.textContent = '▶';
        playBtn.childNodes[2].nodeValue = ' Play';
        if (timer) clearInterval(timer);
      }
    }

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

science.ks2.y2.t1.s3

Aligned learning resources

Related diagrams