<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      color: #1e2945;
      background: transparent;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
      padding: 12px;
      user-select: none;
    }

    .stepper-nav {
      display: flex;
      gap: 8px;
      width: 100%;
      max-width: 440px;
      justify-content: center;
      margin-bottom: 8px;
    }

    .step-btn {
      flex: 1;
      padding: 8px 10px;
      font-size: 14px;
      font-weight: 700;
      border: 2px solid #e2e8f0;
      background: #ffffff;
      border-radius: 20px;
      cursor: pointer;
      color: #64748b;
      transition: all 0.25s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    }

    .step-btn.active {
      border-color: #22b7ff;
      background: #f0f9ff;
      color: #0369a1;
      box-shadow: 0 2px 8px rgba(34, 183, 255, 0.25);
    }

    .stage {
      position: relative;
      width: 100%;
      max-width: 440px;
      height: 300px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

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

    /* Callout Badges */
    .callout {
      position: absolute;
      padding: 6px 12px;
      border-radius: 12px;
      font-size: 14px;
      font-weight: 800;
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      display: flex;
      align-items: center;
      gap: 6px;
      transition: opacity 0.3s ease, transform 0.3s ease;
      pointer-events: none;
    }

    .callout-pinch {
      top: 14px;
      left: 12px;
      background: #eff6ff;
      border: 2px solid #3b82f6;
      color: #1d4ed8;
    }

    .callout-pillow {
      bottom: 24px;
      right: 18px;
      background: #fdf2f8;
      border: 2px solid #ec4899;
      color: #be185d;
    }

    .callout-kittens {
      bottom: 18px;
      left: 18px;
      background: #fafaf9;
      border: 2px solid #a8a29e;
      color: #57534e;
    }

    .dimmed {
      opacity: 0.25 !important;
      transition: opacity 0.3s ease;
    }

    .highlighted {
      opacity: 1 !important;
      transition: opacity 0.3s ease;
    }

    .pulse {
      animation: pulseGlow 2s infinite ease-in-out;
    }

    @keyframes pulseGlow {
      0%, 100% { filter: drop-shadow(0 0 2px rgba(0,0,0,0.2)); }
      50% { filter: drop-shadow(0 0 10px rgba(34,183,255,0.7)); }
    }
  </style>
</head>
<body>

  
  <div class="stepper-nav">
    <button class="step-btn active" id="btnAll" onclick="setMode('all')">✨ All</button>
    <button class="step-btn" id="btnPinch" onclick="setMode('pinch')">1. Pinch!</button>
    <button class="step-btn" id="btnPillow" onclick="setMode('pillow')">2. Pillow</button>
    <button class="step-btn" id="btnTuck" onclick="setMode('tuck')">💤 Tuck</button>
  </div>

  <div class="stage">
    <svg viewBox="0 0 420 300">
      <defs>
        
        <linearGradient id="crayonGrad" x1="0%" y1="0%" x2="100%" y2="100%">
          <stop offset="0%" stop-color="#4ade80"/>
          <stop offset="50%" stop-color="#22c55e"/>
          <stop offset="100%" stop-color="#15803d"/>
        </linearGradient>

        <linearGradient id="pointerGrad" x1="0%" y1="0%" x2="100%" y2="100%">
          <stop offset="0%" stop-color="#60a5fa"/>
          <stop offset="60%" stop-color="#3b82f6"/>
          <stop offset="100%" stop-color="#1d4ed8"/>
        </linearGradient>

        <linearGradient id="thumbGrad" x1="0%" y1="0%" x2="100%" y2="100%">
          <stop offset="0%" stop-color="#fef08a"/>
          <stop offset="50%" stop-color="#eab308"/>
          <stop offset="100%" stop-color="#ca8a04"/>
        </linearGradient>

        <linearGradient id="middleGrad" x1="0%" y1="0%" x2="0%" y2="100%">
          <stop offset="0%" stop-color="#fbcfe8"/>
          <stop offset="50%" stop-color="#f472b6"/>
          <stop offset="100%" stop-color="#db2777"/>
        </linearGradient>

        <linearGradient id="palmGrad" x1="0%" y1="0%" x2="100%" y2="100%">
          <stop offset="0%" stop-color="#fed7aa"/>
          <stop offset="60%" stop-color="#fdba74"/>
          <stop offset="100%" stop-color="#fb923c"/>
        </linearGradient>

        <linearGradient id="tuckGrad" x1="0%" y1="0%" x2="100%" y2="100%">
          <stop offset="0%" stop-color="#fed7aa"/>
          <stop offset="70%" stop-color="#f97316"/>
          <stop offset="100%" stop-color="#c2410c"/>
        </linearGradient>

        <filter id="softShadow" x="-10%" y="-10%" width="130%" height="130%">
          <feDropShadow dx="2" dy="5" stdDeviation="4" flood-opacity="0.18"/>
        </filter>
      </defs>

      
      <g id="grpTuck" class="hand-part" filter="url(#softShadow)">
        
        <path d="M 120 150 C 100 160 80 180 85 220 C 90 250 140 260 190 240 C 230 225 240 190 220 170 Z" fill="url(#palmGrad)"/>
        
        <ellipse cx="145" cy="205" rx="22" ry="18" fill="url(#tuckGrad)" transform="rotate(-15 145 205)"/>
        <path d="M 128 200 C 138 190 155 195 162 210" stroke="#ea580c" stroke-width="2.5" stroke-linecap="round" fill="none"/>
        
        <ellipse cx="120" cy="222" rx="18" ry="15" fill="url(#tuckGrad)" transform="rotate(-20 120 222)"/>
        <path d="M 108 220 C 115 212 128 215 132 228" stroke="#ea580c" stroke-width="2" stroke-linecap="round" fill="none"/>
        
        <text x="100" y="256" font-size="20">🐱💤</text>
      </g>

      
      <g id="grpPillow" class="hand-part" filter="url(#softShadow)">
        
        <path d="M 175 165 C 205 160 255 175 270 200 C 280 215 265 230 235 225 C 205 220 180 190 175 165 Z" fill="url(#middleGrad)"/>
        
        <path d="M 245 195 C 258 198 262 210 254 218" stroke="#9d174d" stroke-width="2.5" stroke-linecap="round" fill="none"/>
        
        <path d="M 230 238 C 245 233 280 235 295 248 C 285 260 240 262 228 250 Z" fill="#fbcfe8" stroke="#ec4899" stroke-width="1.5"/>
        <text x="250" y="254" font-size="14" font-weight="bold" fill="#be185d">🛏️ Pillow</text>
      </g>

      
      <g id="grpCrayon" filter="url(#softShadow)">
        
        <polygon points="340,75 358,89 200,240 182,226" fill="url(#crayonGrad)"/>
        
        <polygon points="182,226 200,240 165,260" fill="#16a34a"/>
        
        <circle cx="165" cy="260" r="3" fill="#14532d"/>
        
        <polygon points="275,138 290,150 265,175 250,163" fill="#ffffff" opacity="0.85"/>
      </g>

      
      <g id="grpPointer" class="hand-part" filter="url(#softShadow)">
        <path d="M 160 110 C 190 90 250 100 275 135 C 285 150 270 170 240 165 C 215 160 185 135 160 110 Z" fill="url(#pointerGrad)"/>
        <ellipse cx="258" cy="148" rx="12" ry="8" fill="#93c5fd" transform="rotate(-20 258 148)" opacity="0.7"/>
        <path d="M 248 138 C 262 142 268 152 260 160" stroke="#1e40af" stroke-width="2.5" stroke-linecap="round" fill="none"/>
      </g>

      
      <g id="grpThumb" class="hand-part" filter="url(#softShadow)">
        <path d="M 140 150 C 160 130 200 135 220 160 C 230 175 220 195 195 195 C 170 195 145 175 140 150 Z" fill="url(#thumbGrad)"/>
        <ellipse cx="210" cy="172" rx="10" ry="7" fill="#fef08a" transform="rotate(15 210 172)" opacity="0.7"/>
        <path d="M 200 162 C 215 166 218 178 210 186" stroke="#a16207" stroke-width="2.5" stroke-linecap="round" fill="none"/>
      </g>

      
      <g id="pinchTarget">
        <circle cx="235" cy="162" r="16" fill="none" stroke="#22b7ff" stroke-width="2.5" stroke-dasharray="4 3"/>
      </g>
    </svg>

    
    <div id="callPinch" class="callout callout-pinch">
      <span>1. Pinch!</span>
      <span style="font-size: 12px; font-weight: normal;">(Thumb 🟨 + Pointer 🟦)</span>
    </div>

    <div id="callPillow" class="callout callout-pillow">
      <span>2. Rest on pillow!</span>
      <span style="font-size: 12px; font-weight: normal;">(Middle 🌸)</span>
    </div>

    <div id="callTuck" class="callout callout-kittens" style="display: none;">
      <span>Sleepy kittens tucked in!</span>
    </div>
  </div>

  <script>
    const modes = ['all', 'pinch', 'pillow', 'tuck'];
    let currentModeIdx = 0;
    let autoTimer = null;

    function setMode(mode) {
      // Update button classes
      document.querySelectorAll('.step-btn').forEach(b => b.classList.remove('active'));
      const activeBtn = {
        'all': 'btnAll',
        'pinch': 'btnPinch',
        'pillow': 'btnPillow',
        'tuck': 'btnTuck'
      }[mode];
      if (document.getElementById(activeBtn)) {
        document.getElementById(activeBtn).classList.add('active');
      }

      const grpPointer = document.getElementById('grpPointer');
      const grpThumb = document.getElementById('grpThumb');
      const grpPillow = document.getElementById('grpPillow');
      const grpTuck = document.getElementById('grpTuck');
      const pinchTarget = document.getElementById('pinchTarget');

      const callPinch = document.getElementById('callPinch');
      const callPillow = document.getElementById('callPillow');
      const callTuck = document.getElementById('callTuck');

      // Reset styles
      [grpPointer, grpThumb, grpPillow, grpTuck].forEach(el => {
        el.className.baseVal = 'hand-part';
      });

      if (mode === 'all') {
        grpPointer.classList.add('highlighted');
        grpThumb.classList.add('highlighted');
        grpPillow.classList.add('highlighted');
        grpTuck.classList.add('highlighted');
        pinchTarget.style.opacity = '1';
        callPinch.style.display = 'flex';
        callPillow.style.display = 'flex';
        callTuck.style.display = 'none';
      } else if (mode === 'pinch') {
        grpPointer.classList.add('highlighted');
        grpThumb.classList.add('highlighted');
        grpPillow.classList.add('dimmed');
        grpTuck.classList.add('dimmed');
        pinchTarget.style.opacity = '1';
        callPinch.style.display = 'flex';
        callPillow.style.display = 'none';
        callTuck.style.display = 'none';
      } else if (mode === 'pillow') {
        grpPointer.classList.add('dimmed');
        grpThumb.classList.add('dimmed');
        grpPillow.classList.add('highlighted');
        grpTuck.classList.add('dimmed');
        pinchTarget.style.opacity = '0';
        callPinch.style.display = 'none';
        callPillow.style.display = 'flex';
        callTuck.style.display = 'none';
      } else if (mode === 'tuck') {
        grpPointer.classList.add('dimmed');
        grpThumb.classList.add('dimmed');
        grpPillow.classList.add('dimmed');
        grpTuck.classList.add('highlighted');
        pinchTarget.style.opacity = '0';
        callPinch.style.display = 'none';
        callPillow.style.display = 'none';
        callTuck.style.display = 'flex';
      }
    }

    // Auto-cycle through steps slowly (every 3.5 seconds) for early learners, stops on user click
    function autoStep() {
      currentModeIdx = (currentModeIdx + 1) % modes.length;
      setMode(modes[currentModeIdx]);
    }

    autoTimer = setInterval(autoStep, 3500);

    document.querySelectorAll('.step-btn').forEach(btn => {
      btn.addEventListener('click', () => {
        clearInterval(autoTimer);
      });
    });
  </script>
</body>
</html>

Holding a Crayon or Pencil with a Comfortable Grip

<!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%;
      height: 100%;
      background: #ffffff;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
    }

    .nav-bar {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      width: 100%;
      max-width: 480px;
    }

    .step-btn {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      background: #f1f5f9;
      border: none;
      box-shadow: 0 0 0 1px #cbd5e1;
      border-radius: 999px;
      padding: 6px 10px;
      font-size: 13px;
      font-weight: 700;
      color: #64748b;
      cursor: pointer;
      transition: all 0.25s ease;
    }

    .step-btn.active {
      background: #e0f2fe;
      box-shadow: 0 0 0 2px #0284c7;
      color: #0369a1;
    }

    .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: #cbd5e1;
      color: #ffffff;
      font-size: 11px;
      font-weight: 800;
    }

    .step-btn.active .step-num {
      background: #0284c7;
    }

    .stage-container {
      position: relative;
      width: 100%;
      max-width: 480px;
      flex: 1;
      min-height: 240px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 8px 0;
    }

    .step-panel {
      position: absolute;
      inset: 0;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.35s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }

    .step-panel.active {
      opacity: 1;
      pointer-events: auto;
    }

    svg {
      width: 100%;
      height: 100%;
      max-height: 260px;
    }

    .caption {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      text-align: center;
      margin-top: 4px;
    }

    .controls {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .play-btn {
      display: flex;
      align-items: center;
      gap: 6px;
      background: #f8fafc;
      border: 1px solid #cbd5e1;
      border-radius: 20px;
      padding: 5px 14px;
      font-size: 12px;
      font-weight: 600;
      color: #334155;
      cursor: pointer;
      user-select: none;
    }

    .play-btn:active {
      background: #e2e8f0;
    }
  </style>
</head>
<body>

  
  <div class="nav-bar">
    <button class="step-btn active" id="btn0" onclick="goToStep(0)">
      <span class="step-num">1</span> Pinch
    </button>
    <button class="step-btn" id="btn1" onclick="goToStep(1)">
      <span class="step-num">2</span> Flip
    </button>
    <button class="step-btn" id="btn2" onclick="goToStep(2)">
      <span class="step-num">3</span> Grip
    </button>
  </div>

  
  <div class="stage-container">
    
    
    <div class="step-panel active" id="panel0">
      <svg viewBox="0 0 400 240">
        
        <rect x="130" y="215" width="140" height="20" rx="10" fill="#f1f5f9" stroke="#cbd5e1" stroke-width="1.5" />
        <text x="200" y="229" font-size="11" font-weight="700" fill="#64748b" text-anchor="middle">👇 Point to Tummy</text>

        
        <path d="M 120,40 C 120,10 280,10 280,40 C 280,80 260,110 200,110 C 140,110 120,80 120,40 Z" fill="#fed7aa" stroke="#fb923c" stroke-width="3" />
        
        
        <ellipse cx="165" cy="115" rx="22" ry="16" fill="#fed7aa" stroke="#fb923c" stroke-width="3" transform="rotate(25 165 115)" />
        
        
        <ellipse cx="235" cy="115" rx="22" ry="16" fill="#fed7aa" stroke="#fb923c" stroke-width="3" transform="rotate(-25 235 115)" />

        
        
        <rect x="188" y="45" width="24" height="105" rx="3" fill="#38bdf8" stroke="#0284c7" stroke-width="2.5" />
        
        <rect x="188" y="75" width="24" height="20" fill="#0284c7" />
        
        <polygon points="188,150 212,150 200,185" fill="#38bdf8" stroke="#0284c7" stroke-width="2.5" stroke-linejoin="round" />
        <polygon points="194,168 206,168 200,185" fill="#0284c7" />

        
        <circle cx="182" cy="120" r="5" fill="#f97316" />
        <circle cx="218" cy="120" r="5" fill="#f97316" />
      </svg>
      <div class="caption">1. Pinch tip with thumb & pointer</div>
    </div>

    
    <div class="step-panel" id="panel1">
      <svg viewBox="0 0 400 240">
        
        <path d="M 200,55 C 270,30 310,110 260,165" fill="none" stroke="#0284c7" stroke-width="4" stroke-dasharray="7 5" stroke-linecap="round" />
        <polygon points="252,150 266,170 245,168" fill="#0284c7" />
        
        
        <path d="M 120,50 C 120,20 280,20 280,50 C 280,90 260,120 200,120 C 140,120 120,90 120,50 Z" fill="#fed7aa" stroke="#fb923c" stroke-width="3" />
        <ellipse cx="168" cy="122" rx="20" ry="15" fill="#fed7aa" stroke="#fb923c" stroke-width="3" transform="rotate(20 168 122)" />
        <ellipse cx="232" cy="122" rx="20" ry="15" fill="#fed7aa" stroke="#fb923c" stroke-width="3" transform="rotate(-20 232 122)" />

        
        <g opacity="0.25">
          <rect x="188" y="45" width="24" height="105" rx="3" fill="#38bdf8" stroke="#0284c7" stroke-width="2" />
          <polygon points="188,150 212,150 200,185" fill="#38bdf8" stroke="#0284c7" stroke-width="2" />
        </g>

        
        <g transform="rotate(50 200 135)">
          <rect x="188" y="45" width="24" height="105" rx="3" fill="#38bdf8" stroke="#0284c7" stroke-width="2.5" />
          <rect x="188" y="75" width="24" height="20" fill="#0284c7" />
          <polygon points="188,150 212,150 200,185" fill="#38bdf8" stroke="#0284c7" stroke-width="2.5" />
        </g>
        
        
        <rect x="255" y="65" width="70" height="24" rx="12" fill="#0284c7" />
        <text x="290" y="81" font-size="12" font-weight="800" fill="#ffffff" text-anchor="middle">FLIP ↷</text>
      </svg>
      <div class="caption">2. Flip crayon back over hand</div>
    </div>

    
    <div class="step-panel" id="panel2">
      <svg viewBox="0 0 400 240">
        
        
        <path d="M 90,140 C 90,70 180,60 210,95 C 240,130 200,170 150,175 Z" fill="#fed7aa" stroke="#fb923c" stroke-width="3" />
        
        
        <circle cx="160" cy="85" r="14" fill="#fef08a" stroke="#eab308" stroke-width="2" stroke-dasharray="3 2" />
        
        
        <g transform="rotate(-40 180 150)">
          <rect x="168" y="50" width="24" height="110" rx="3" fill="#38bdf8" stroke="#0284c7" stroke-width="2.5" />
          <rect x="168" y="80" width="24" height="20" fill="#0284c7" />
          <polygon points="168,160 192,160 180,195" fill="#38bdf8" stroke="#0284c7" stroke-width="2.5" stroke-linejoin="round" />
          <polygon points="174,178 186,178 180,195" fill="#0284c7" />
        </g>

        
        <ellipse cx="140" cy="148" rx="26" ry="18" fill="#fed7aa" stroke="#fb923c" stroke-width="3" transform="rotate(-15 140 148)" />
        
        <ellipse cx="178" cy="128" rx="22" ry="15" fill="#fed7aa" stroke="#fb923c" stroke-width="3" transform="rotate(35 178 128)" />
        
        <ellipse cx="195" cy="155" rx="18" ry="13" fill="#fed7aa" stroke="#fb923c" stroke-width="3" />

        
        <circle cx="295" cy="55" r="18" fill="#22c55e" />
        <path d="M 287,55 L 293,61 L 304,49" fill="none" stroke="#ffffff" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" />
        <text x="295" y="88" font-size="11" font-weight="800" fill="#16a34a" text-anchor="middle">Ready to Draw!</text>
      </svg>
      <div class="caption">3. Rests comfortably in tripod grip</div>
    </div>

  </div>

  
  <div class="controls">
    <button class="play-btn" id="playBtn" onclick="togglePlay()">
      <span id="playIcon">⏸</span> Auto-Play
    </button>
  </div>

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

    function showStep(index) {
      currentStep = index;
      for (let i = 0; i < 3; i++) {
        document.getElementById('panel' + i).classList.toggle('active', i === index);
        document.getElementById('btn' + i).classList.toggle('active', i === index);
      }
    }

    function goToStep(index) {
      showStep(index);
      if (isPlaying) {
        resetTimer();
      }
    }

    function nextStep() {
      const next = (currentStep + 1) % 3;
      showStep(next);
    }

    function resetTimer() {
      clearInterval(timer);
      if (isPlaying) {
        timer = setInterval(nextStep, 3000);
      }
    }

    function togglePlay() {
      isPlaying = !isPlaying;
      document.getElementById('playIcon').textContent = isPlaying ? '⏸' : '▶';
      if (isPlaying) {
        resetTimer();
      } else {
        clearInterval(timer);
      }
    }

    // Start auto loop
    resetTimer();
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      background: #f4f8fb;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
      padding: 12px;
      user-select: none;
    }

    .diagram-area {
      width: 100%;
      max-width: 480px;
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    svg {
      width: 100%;
      height: auto;
      max-height: 320px;
      overflow: visible;
    }

    .jaw-top {
      transform-origin: 100px 140px;
      transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    .jaw-bottom {
      transform-origin: 100px 170px;
      transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    /* State 1: Open alligator mouth */
    .state-open .jaw-top {
      transform: rotate(-22deg);
    }
    .state-open .jaw-bottom {
      transform: rotate(20deg);
    }
    .state-open .chomp-lines {
      opacity: 0;
    }

    /* State 2: Closed pinch on crayon */
    .state-pinch .jaw-top {
      transform: rotate(-4deg);
    }
    .state-pinch .jaw-bottom {
      transform: rotate(3deg);
    }
    .state-pinch .chomp-lines {
      opacity: 1;
    }

    .chomp-lines {
      transition: opacity 0.3s ease;
    }

    /* Controls */
    .controls {
      display: flex;
      gap: 10px;
      margin-top: 8px;
    }

    .btn {
      padding: 8px 16px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 999px;
      border: 2px solid #22b7ff;
      background: #ffffff;
      color: #1e2945;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      box-shadow: 0 2px 4px rgba(0,0,0,0.05);
      transition: background 0.2s, color 0.2s, box-shadow 0.2s;
    }

    .btn.active {
      background: #22b7ff;
      color: #ffffff;
      box-shadow: 0 3px 8px rgba(34, 183, 255, 0.35);
    }

    .tag-text {
      font-size: 13px;
      font-weight: bold;
      fill: #1e2945;
    }
  </style>
</head>
<body>

  <div class="diagram-area">
    <svg id="svgHand" class="state-open" viewBox="0 0 420 300">
      <defs>
        
        <filter id="softShadow" x="-10%" y="-10%" width="130%" height="130%">
          <feDropShadow dx="2" dy="4" stdDeviation="4" flood-color="#0f2b48" flood-opacity="0.12"/>
        </filter>
        
        <linearGradient id="crayonGrad" x1="0%" y1="0%" x2="0%" y2="100%">
          <stop offset="0%" stop-color="#4ade80" />
          <stop offset="100%" stop-color="#22c55e" />
        </linearGradient>
        <linearGradient id="skinGrad" x1="0%" y1="0%" x2="100%" y2="0%">
          <stop offset="0%" stop-color="#ffd2a6" />
          <stop offset="100%" stop-color="#fbc08a" />
        </linearGradient>
      </defs>

      
      <g filter="url(#softShadow)">
        <path d="M 40 120 C 40 90, 85 80, 115 100 C 135 115, 140 180, 110 205 C 80 230, 40 200, 40 160 Z" fill="#f8b377" />
        <path d="M 95 130 C 115 135, 125 155, 115 175 C 105 190, 85 185, 80 170" fill="none" stroke="#e09455" stroke-width="3.5" stroke-linecap="round" />
        <path d="M 80 150 C 95 155, 105 170, 95 185" fill="none" stroke="#e09455" stroke-width="3" stroke-linecap="round" />
      </g>

      
      <g id="crayon" transform="translate(190, 85) rotate(32)" filter="url(#softShadow)">
        
        <rect x="0" y="25" width="160" height="34" rx="4" fill="url(#crayonGrad)" />
        
        <rect x="35" y="25" width="90" height="34" fill="#15803d" opacity="0.85" />
        <line x1="45" y1="25" x2="45" y2="59" stroke="#86efac" stroke-width="3" stroke-dasharray="2 3"/>
        <line x1="115" y1="25" x2="115" y2="59" stroke="#86efac" stroke-width="3" stroke-dasharray="2 3"/>
        
        <path d="M 0 25 L -26 42 L 0 59 Z" fill="#22c55e" />
        <path d="M -18 37 L -26 42 L -18 47 Z" fill="#16a34a" />
      </g>

      
      <g transform="translate(230, 240)">
        <rect x="-8" y="-18" width="84" height="24" rx="12" fill="#ffffff" stroke="#22c55e" stroke-width="2"/>
        <text x="34" y="-2" text-anchor="middle" class="tag-text" fill="#15803d">Crayon</text>
      </g>

      
      <g class="jaw-top" filter="url(#softShadow)">
        
        <path d="M 90 125 C 90 105, 140 100, 205 125 C 220 131, 222 153, 202 156 C 160 162, 115 155, 90 142 Z" fill="url(#skinGrad)" stroke="#f59e0b" stroke-width="1.5" />
        
        
        <g transform="translate(198, 140)">
          
          <circle cx="-5" cy="-6" r="2" fill="#1e2945" />
          <circle cx="3" cy="-6" r="2" fill="#1e2945" />
          
          <path d="M -5 -1 Q -1 4, 3 -1" fill="none" stroke="#1e2945" stroke-width="1.8" stroke-linecap="round" />
          
          <ellipse cx="-7" cy="-2" rx="2" ry="1.2" fill="#ff7675" opacity="0.6"/>
          <ellipse cx="5" cy="-2" rx="2" ry="1.2" fill="#ff7675" opacity="0.6"/>
        </g>
      </g>

      
      <g class="jaw-bottom" filter="url(#softShadow)">
        
        <path d="M 85 170 C 110 165, 160 160, 205 175 C 222 181, 218 203, 198 206 C 145 212, 100 205, 80 185 Z" fill="url(#skinGrad)" stroke="#f59e0b" stroke-width="1.5" />
        
        
        <g transform="translate(196, 188)">
          
          <circle cx="-5" cy="-4" r="2" fill="#1e2945" />
          <circle cx="3" cy="-4" r="2" fill="#1e2945" />
          
          <path d="M -5 1 Q -1 6, 3 1" fill="none" stroke="#1e2945" stroke-width="1.8" stroke-linecap="round" />
          
          <ellipse cx="-7" cy="0" rx="2" ry="1.2" fill="#ff7675" opacity="0.6"/>
          <ellipse cx="5" cy="0" rx="2" ry="1.2" fill="#ff7675" opacity="0.6"/>
        </g>
      </g>

      
      <g transform="translate(160, 48)">
        <line x1="20" y1="20" x2="20" y2="48" stroke="#3b82f6" stroke-width="2" stroke-dasharray="3 3"/>
        <rect x="-42" y="-10" width="124" height="28" rx="14" fill="#ffffff" stroke="#3b82f6" stroke-width="2"/>
        <text x="20" y="9" text-anchor="middle" class="tag-text">Pointer Finger</text>
      </g>

      
      <g transform="translate(160, 260)">
        <line x1="20" y1="-20" x2="20" y2="-44" stroke="#3b82f6" stroke-width="2" stroke-dasharray="3 3"/>
        <rect x="-18" y="-10" width="76" height="28" rx="14" fill="#ffffff" stroke="#3b82f6" stroke-width="2"/>
        <text x="20" y="9" text-anchor="middle" class="tag-text">Thumb</text>
      </g>

      
      <g class="chomp-lines" transform="translate(222, 160)">
        <path d="M -4 -16 L -10 -24" stroke="#eab308" stroke-width="3" stroke-linecap="round" />
        <path d="M 8 -16 L 14 -24" stroke="#eab308" stroke-width="3" stroke-linecap="round" />
        <path d="M -4 16 L -10 24" stroke="#eab308" stroke-width="3" stroke-linecap="round" />
        <path d="M 8 16 L 14 24" stroke="#eab308" stroke-width="3" stroke-linecap="round" />
      </g>
    </svg>
  </div>

  
  <div class="controls">
    <button id="btnOpen" class="btn active">1. Open Jaw 🐊</button>
    <button id="btnPinch" class="btn">2. Gentle Grip ✏️</button>
  </div>

  <script>
    const svgHand = document.getElementById('svgHand');
    const btnOpen = document.getElementById('btnOpen');
    const btnPinch = document.getElementById('btnPinch');

    function setMode(open) {
      if (open) {
        svgHand.classList.remove('state-pinch');
        svgHand.classList.add('state-open');
        btnOpen.classList.add('active');
        btnPinch.classList.remove('active');
      } else {
        svgHand.classList.remove('state-open');
        svgHand.classList.add('state-pinch');
        btnPinch.classList.add('active');
        btnOpen.classList.remove('active');
      }
    }

    btnOpen.addEventListener('click', () => setMode(true));
    btnPinch.addEventListener('click', () => setMode(false));

    // Calm auto-demonstration loop
    let state = true;
    let timer = setInterval(() => {
      state = !state;
      setMode(state);
    }, 3200);

    // Pause auto loop upon direct user interaction
    [btnOpen, btnPinch].forEach(btn => {
      btn.addEventListener('click', () => {
        clearInterval(timer);
      });
    });
  </script>
</body>
</html>

OGE.0.W.1

Aligned learning resources

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