<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Taxonomic Hierarchy - Gray Wolf</title>
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: transparent;
      padding: 8px 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100vh;
      max-height: 580px;
      user-select: none;
    }

    .header-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 520px;
      margin-bottom: 6px;
      font-size: 12px;
      font-weight: 600;
      color: #475569;
      gap: 6px;
    }

    .header-tag {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      white-space: nowrap;
    }

    .header-tag.species-title {
      text-align: right;
      flex-shrink: 0;
    }

    .pyramid-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      width: 100%;
      max-width: 520px;
      gap: 5px;
      flex: 1;
      justify-content: center;
    }

    .rank-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 38px;
      border-radius: 8px;
      border: 1.5px solid #cbd5e1;
      padding: 0 12px;
      cursor: pointer;
      transition: opacity 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
      box-shadow: 0 1px 2px rgba(0,0,0,0.04);
      opacity: 0.82;
    }

    .rank-row:hover {
      opacity: 0.95;
      border-color: #0284c7;
      box-shadow: 0 0 0 1.5px #38bdf8;
    }

    .rank-row.active {
      opacity: 1;
      border-color: #0284c7;
      box-shadow: 0 0 0 2px #0284c7, 0 2px 6px rgba(2, 132, 199, 0.2);
    }

    .rank-title {
      font-size: 13px;
      font-weight: 500;
      color: #334155;
      display: flex;
      align-items: center;
      gap: 6px;
      white-space: nowrap;
    }

    .rank-row.active .rank-title {
      color: #0f172a;
      font-weight: 600;
    }

    .rank-name {
      font-size: 13.5px;
      font-weight: 700;
      color: #0f172a;
      letter-spacing: -0.1px;
    }

    .species-italic {
      font-style: italic;
    }

    .rank-icons {
      font-size: 15px;
      letter-spacing: 2px;
      white-space: nowrap;
      filter: drop-shadow(0 1px 1px rgba(0,0,0,0.05));
    }

    /* Hierarchy level widths & soft color bands */
    .lvl-1 { width: 100%; background: #e0f2fe; } /* Domain */
    .lvl-2 { width: 93%;  background: #e0e7ff; } /* Kingdom */
    .lvl-3 { width: 86%;  background: #ede9fe; } /* Phylum */
    .lvl-4 { width: 79%;  background: #fae8ff; } /* Class */
    .lvl-5 { width: 72%;  background: #fce7f3; } /* Order */
    .lvl-6 { width: 65%;  background: #ffedd5; } /* Family */
    .lvl-7 { width: 58%;  background: #fef3c7; } /* Genus */
    .lvl-8 { width: 51%;  background: #dcfce7; } /* Species */

    .info-footer {
      width: 100%;
      max-width: 520px;
      margin-top: 6px;
      display: flex;
      flex-direction: column;
      gap: 6px;
      padding: 8px 10px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
    }

    .footer-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 8px;
    }

    .footer-desc-box {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 12.5px;
      color: #1e2945;
      font-weight: 500;
      min-height: 20px;
      line-height: 1.35;
    }

    .rank-badge {
      display: inline-block;
      padding: 2px 7px;
      border-radius: 4px;
      background: #0284c7;
      color: #ffffff;
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.2px;
      white-space: nowrap;
      flex-shrink: 0;
    }

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

    .step-btn {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      color: #1e2945;
      padding: 4px 9px;
      border-radius: 6px;
      font-size: 11.5px;
      font-weight: 600;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: background-color 0.15s ease, border-color 0.15s ease;
    }

    .step-btn:hover {
      background: #f1f5f9;
      border-color: #94a3b8;
    }

    .scope-label {
      font-size: 11.5px;
      font-weight: 600;
      color: #64748b;
      white-space: nowrap;
    }

    @media (max-width: 440px) {
      .header-bar { font-size: 11px; }
      .rank-row { height: 35px; padding: 0 8px; gap: 4px; }
      .rank-title { font-size: 11.5px; gap: 4px; }
      .rank-name { font-size: 12px; }
      .rank-icons { font-size: 12.5px; letter-spacing: 1px; }
      .lvl-5 { width: 75%; }
      .lvl-6 { width: 70%; }
      .lvl-7 { width: 65%; }
      .lvl-8 { width: 60%; }
      .footer-desc-box { font-size: 11.5px; }
      .step-btn { padding: 3px 7px; font-size: 11px; }
    }

    @media (max-width: 360px) {
      .lvl-6 { width: 74%; }
      .lvl-7 { width: 70%; }
      .lvl-8 { width: 66%; }
      .rank-icons { letter-spacing: 0.5px; }
    }
  </style>
</head>
<body>

  <div class="header-bar">
    <div class="header-tag">▲ Broadest (All Complex Cells)</div>
    <div class="header-tag species-title">Gray Wolf&nbsp;(<em class="species-italic">Canis lupus</em>)</div>
  </div>

  <div class="pyramid-container" id="pyramid">
    <div class="rank-row lvl-1" data-index="0" role="button" tabindex="0">
      <span class="rank-title">Domain <span class="rank-name">Eukarya</span></span>
      <span class="rank-icons" aria-label="Tree, Mushroom, Fish, Wolf">🌲🍄🐟🐺</span>
    </div>
    <div class="rank-row lvl-2" data-index="1" role="button" tabindex="0">
      <span class="rank-title">Kingdom <span class="rank-name">Animalia</span></span>
      <span class="rank-icons" aria-label="Butterfly, Fish, Eagle, Wolf">🦋🐠🦅🐺</span>
    </div>
    <div class="rank-row lvl-3" data-index="2" role="button" tabindex="0">
      <span class="rank-title">Phylum <span class="rank-name">Chordata</span></span>
      <span class="rank-icons" aria-label="Frog, Lizard, Eagle, Wolf">🐸🦎🦅🐺</span>
    </div>
    <div class="rank-row lvl-4" data-index="3" role="button" tabindex="0">
      <span class="rank-title">Class <span class="rank-name">Mammalia</span></span>
      <span class="rank-icons" aria-label="Bat, Bear, Cat, Wolf">🦇🐻🐱🐺</span>
    </div>
    <div class="rank-row lvl-5" data-index="4" role="button" tabindex="0">
      <span class="rank-title">Order <span class="rank-name">Carnivora</span></span>
      <span class="rank-icons" aria-label="Seal, Bear, Cat, Wolf">🦭🐻🐱🐺</span>
    </div>
    <div class="rank-row lvl-6" data-index="5" role="button" tabindex="0">
      <span class="rank-title">Family <span class="rank-name">Canidae</span></span>
      <span class="rank-icons" aria-label="Fox, Dog, Wolf">🦊🐕🐺</span>
    </div>
    <div class="rank-row lvl-7" data-index="6" role="button" tabindex="0">
      <span class="rank-title">Genus <span class="rank-name species-italic">Canis</span></span>
      <span class="rank-icons" aria-label="Dog, Wolf">🐕🐺</span>
    </div>
    <div class="rank-row lvl-8" data-index="7" role="button" tabindex="0">
      <span class="rank-title">Species <span class="rank-name species-italic">C. lupus</span></span>
      <span class="rank-icons" aria-label="Wolf">🐺</span>
    </div>
  </div>

  <div class="info-footer">
    <div class="footer-top">
      <div class="controls-group">
        <button class="step-btn" id="playBtn" type="button">⏸ Pause</button>
        <button class="step-btn" id="nextBtn" type="button">Next ❯</button>
      </div>
      <span class="scope-label">▼ Most Specific</span>
    </div>
    <div class="footer-desc-box">
      <span class="rank-badge" id="rankBadge">Domain</span>
      <span id="rankDesc">All organisms with nucleus-containing complex cells</span>
    </div>
  </div>

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    const rankBadge = document.getElementById('rankBadge');
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    const rankDetails = [
      { badge: "Domain: Eukarya", desc: "Organisms with complex cells containing membrane-bound nuclei" },
      { badge: "Kingdom: Animalia", desc: "Multicellular, heterotrophic organisms capable of spontaneous movement" },
      { badge: "Phylum: Chordata", desc: "Animals possessing a bilateral nerve cord and spinal structure" },
      { badge: "Class: Mammalia", desc: "Endothermic vertebrates with hair/fur and mammary glands" },
      { badge: "Order: Carnivora", desc: "Specialized placental predators adapted for hunting and meat-eating" },
      { badge: "Family: Canidae", desc: "Dog-like carnivorans with slender bodies and bushy tails" },
      { badge: "Genus: Canis", desc: "Closely related canines including wolves, jackals, and coyotes" },
      { badge: "Species: C. lupus", desc: "Gray Wolf: Unique interbreeding population with distinct morphology" }
    ];

    let currentIndex = 0;
    let isPlaying = true;
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    function updateRank(index) {
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          row.setAttribute('aria-selected', 'true');
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          row.setAttribute('aria-selected', 'false');
        }
      });

      const current = rankDetails[currentIndex];
      rankBadge.textContent = current.badge;
      rankDesc.textContent = current.desc;
    }

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      updateRank(currentIndex + 1);
    }

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      if (timer) clearInterval(timer);
      timer = setInterval(advance, 2800);
      isPlaying = true;
      playBtn.textContent = '⏸ Pause';
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        clearInterval(timer);
        timer = null;
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      playBtn.textContent = '▶ Auto';
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          updateRank(idx);
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    });

    playBtn.addEventListener('click', () => {
      if (isPlaying) {
        stopAuto();
      } else {
        advance();
        startAuto();
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    });

    nextBtn.addEventListener('click', () => {
      stopAuto();
      advance();
    });

    // Initialize immediately synchronized
    updateRank(0);
    startAuto();
  </script>
</body>
</html>

Taxonomic Hierarchies and Dichotomous Classification Keys

<!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;
      background: #f8fafc;
      color: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      min-height: 100%;
    }

    .toolbar {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
      justify-content: center;
      margin-bottom: 12px;
      width: 100%;
      max-width: 600px;
    }

    .specimen-btn {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      padding: 6px 10px;
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: #1e2945;
      cursor: pointer;
      box-shadow: 0 1px 2px rgba(0,0,0,0.04);
      transition: background 0.2s, border-color 0.2s, box-shadow 0.2s;
    }
    .specimen-btn:hover {
      border-color: #059669;
    }
    .specimen-btn.active {
      background: #ecfdf5;
      border-color: #059669;
      color: #059669;
      box-shadow: 0 0 0 2px rgba(5,150,105,0.15);
    }

    .key-flow {
      display: flex;
      flex-direction: column;
      gap: 10px;
      width: 100%;
      max-width: 580px;
    }

    .step-card {
      background: #ffffff;
      border-radius: 12px;
      border: 1.5px solid #e2e8f0;
      padding: 10px 12px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
      transition: border-color 0.25s, box-shadow 0.25s, opacity 0.25s;
    }
    .step-card.active-step {
      border-color: #059669;
      box-shadow: 0 2px 8px rgba(5,150,105,0.12);
    }
    .step-card.dimmed {
      opacity: 0.45;
    }

    .step-head {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 700;
      color: #1e2945;
      margin-bottom: 8px;
    }
    .step-badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: #1e2945;
      color: #ffffff;
      font-size: 12px;
    }
    .step-card.active-step .step-badge {
      background: #059669;
    }

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

    .branch {
      border: 1.5px solid #f1f5f9;
      background: #f8fafc;
      border-radius: 8px;
      padding: 8px 10px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 6px;
      transition: background 0.2s, border-color 0.2s;
    }
    .branch.chosen {
      background: #ecfdf5;
      border-color: #059669;
    }

    .branch-code {
      font-size: 12px;
      font-weight: 700;
      color: #64748b;
    }
    .branch.chosen .branch-code {
      color: #059669;
    }

    .branch-text {
      font-size: 13px;
      font-weight: 600;
      color: #1e2945;
      line-height: 1.25;
    }

    .result-tag {
      font-size: 12px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      color: #059669;
      background: #ffffff;
      padding: 4px 6px;
      border-radius: 6px;
      border: 1px solid #d1fae5;
    }
    .result-tag.goto {
      color: #64748b;
      border-color: #e2e8f0;
      background: #ffffff;
    }
    .branch.chosen .result-tag.goto {
      color: #059669;
      border-color: #a7f3d0;
    }

    .sci-name {
      font-style: italic;
      font-size: 11px;
      color: #475569;
    }

    @media (max-width: 440px) {
      .branches {
        grid-template-columns: 1fr;
      }
      .specimen-btn {
        font-size: 12px;
        padding: 5px 8px;
      }
      .branch-text {
        font-size: 12px;
      }
    }
  </style>
</head>
<body>

  <div class="toolbar">
    <button class="specimen-btn active" onclick="selectSpecimen('all')"><span>🔍</span> All Paths</button>
    <button class="specimen-btn" onclick="selectSpecimen('earthworm')"><span>🪱</span> Earthworm</button>
    <button class="specimen-btn" onclick="selectSpecimen('ant')"><span>🐜</span> Ant</button>
    <button class="specimen-btn" onclick="selectSpecimen('spider')"><span>🕷️</span> Spider</button>
    <button class="specimen-btn" onclick="selectSpecimen('centipede')"><span>🐛</span> Centipede</button>
  </div>

  <div class="key-flow">
    
    <div class="step-card active-step" id="card-1">
      <div class="step-head">
        <span class="step-badge">1</span>
        <span>Leg Structure</span>
      </div>
      <div class="branches">
        <div class="branch" id="b-1a">
          <span class="branch-code">1a</span>
          <span class="branch-text">Has jointed legs</span>
          <div class="result-tag goto">Go to 2 ➔</div>
        </div>
        <div class="branch" id="b-1b">
          <span class="branch-code">1b</span>
          <span class="branch-text">No jointed legs</span>
          <div class="result-tag">
            <span>🪱 Earthworm</span>
          </div>
          <span class="sci-name">Lumbricus terrestris</span>
        </div>
      </div>
    </div>

    
    <div class="step-card" id="card-2">
      <div class="step-head">
        <span class="step-badge">2</span>
        <span>Leg Count</span>
      </div>
      <div class="branches">
        <div class="branch" id="b-2a">
          <span class="branch-code">2a</span>
          <span class="branch-text">Exactly 6 legs</span>
          <div class="result-tag">
            <span>🐜 Ant</span>
          </div>
          <span class="sci-name">Formica rufa</span>
        </div>
        <div class="branch" id="b-2b">
          <span class="branch-code">2b</span>
          <span class="branch-text">More than 6 legs</span>
          <div class="result-tag goto">Go to 3 ➔</div>
        </div>
      </div>
    </div>

    
    <div class="step-card" id="card-3">
      <div class="step-head">
        <span class="step-badge">3</span>
        <span>Higher Leg Count</span>
      </div>
      <div class="branches">
        <div class="branch" id="b-3a">
          <span class="branch-code">3a</span>
          <span class="branch-text">Exactly 8 legs</span>
          <div class="result-tag">
            <span>🕷️ Spider</span>
          </div>
          <span class="sci-name">Araneus diadematus</span>
        </div>
        <div class="branch" id="b-3b">
          <span class="branch-code">3b</span>
          <span class="branch-text">More than 10 legs</span>
          <div class="result-tag">
            <span>🐛 Centipede</span>
          </div>
          <span class="sci-name">Scolopendra viridis</span>
        </div>
      </div>
    </div>
  </div>

  <script>
    const paths = {
      all: { cards: [1, 2, 3], branches: [] },
      earthworm: { cards: [1], branches: ['b-1b'] },
      ant: { cards: [1, 2], branches: ['b-1a', 'b-2a'] },
      spider: { cards: [1, 2, 3], branches: ['b-1a', 'b-2b', 'b-3a'] },
      centipede: { cards: [1, 2, 3], branches: ['b-1a', 'b-2b', 'b-3b'] }
    };

    function selectSpecimen(key) {
      document.querySelectorAll('.specimen-btn').forEach(btn => {
        btn.classList.toggle('active', btn.getAttribute('onclick').includes(key));
      });

      const p = paths[key];

      [1, 2, 3].forEach(step => {
        const card = document.getElementById('card-' + step);
        const isActive = p.cards.includes(step);
        if (key === 'all') {
          card.classList.add('active-step');
          card.classList.remove('dimmed');
        } else {
          card.classList.toggle('active-step', isActive);
          card.classList.toggle('dimmed', !isActive);
        }
      });

      document.querySelectorAll('.branch').forEach(b => {
        b.classList.toggle('chosen', p.branches.includes(b.id));
      });
    }
  </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;
      color: #1e2945;
      background: #ffffff;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      user-select: none;
    }

    /* Animal picker bar */
    .animal-bar {
      display: flex;
      justify-content: space-between;
      gap: 6px;
    }
    .animal-btn {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      padding: 6px 4px;
      background: #f8fafc;
      border: 1.5px solid #e2e8f0;
      border-radius: 8px;
      cursor: pointer;
      font-size: 13px;
      font-weight: 600;
      color: #1e2945;
      transition: all 0.25s ease;
    }
    .animal-btn .emoji { font-size: 18px; }
    .animal-btn.active {
      background: #fffbeb;
      border-color: #d97706;
      color: #b45309;
      box-shadow: 0 0 0 2px rgba(217, 119, 6, 0.2);
    }

    /* Key Steps List */
    .steps-container {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .step-card {
      border: 1.5px solid #e2e8f0;
      border-radius: 10px;
      background: #fbfcfe;
      padding: 8px 10px;
      display: flex;
      flex-direction: column;
      gap: 6px;
      transition: border-color 0.25s ease, background 0.25s ease;
    }
    .step-card.active-step {
      border-color: #cbd5e1;
      background: #ffffff;
    }

    .step-header {
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: #64748b;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .branches {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
    }
    @media (max-width: 480px) {
      .branches {
        grid-template-columns: 1fr;
        gap: 6px;
      }
      .animal-btn span.name { display: none; }
      .animal-btn { padding: 8px 0; }
    }

    .branch {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 6px;
      padding: 6px 10px;
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 6px;
      font-size: 12px;
      line-height: 1.3;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .branch:hover {
      border-color: #94a3b8;
    }

    .branch.highlight {
      background: #fffbeb;
      border-color: #d97706;
      box-shadow: 0 1px 3px rgba(217, 119, 6, 0.15);
    }
    .branch.highlight .branch-target {
      color: #d97706;
      font-weight: 700;
    }
    .branch.dimmed {
      opacity: 0.45;
    }

    .branch-code {
      font-weight: 700;
      color: #d97706;
      margin-right: 2px;
    }
    .branch-desc {
      flex: 1;
      color: #1e2945;
    }
    .branch-target {
      font-size: 11px;
      font-weight: 600;
      color: #475569;
      white-space: nowrap;
      display: flex;
      align-items: center;
      gap: 2px;
    }
    .latin {
      font-style: italic;
      font-size: 11px;
      display: block;
      color: #64748b;
    }
    .branch.highlight .latin {
      color: #b45309;
    }

    /* Footer status */
    .status-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 6px 10px;
      background: #f1f5f9;
      border-radius: 6px;
      font-size: 12px;
      font-weight: 600;
      color: #334155;
    }
    .path-crumbs {
      display: flex;
      align-items: center;
      gap: 4px;
      color: #d97706;
      font-weight: 700;
    }
  </style>
</head>
<body>

  
  <div class="animal-bar">
    <button class="animal-btn active" data-animal="trout">
      <span class="emoji">🐟</span>
      <span class="name">Trout</span>
    </button>
    <button class="animal-btn" data-animal="eagle">
      <span class="emoji">🦅</span>
      <span class="name">Eagle</span>
    </button>
    <button class="animal-btn" data-animal="rabbit">
      <span class="emoji">🐇</span>
      <span class="name">Rabbit</span>
    </button>
    <button class="animal-btn" data-animal="frog">
      <span class="emoji">🐸</span>
      <span class="name">Frog</span>
    </button>
  </div>

  
  <div class="steps-container">

    
    <div class="step-card" id="card-step1">
      <div class="step-header"><span>Step 1</span></div>
      <div class="branches">
        <div class="branch" id="b-1a" data-choice="1a">
          <div>
            <span class="branch-code">1a</span>
            <span class="branch-desc">Gills &amp; fins</span>
          </div>
          <div class="branch-target">
            <div>🐟 Trout <span class="latin">Salmo trutta</span></div>
          </div>
        </div>
        <div class="branch" id="b-1b" data-choice="1b">
          <div>
            <span class="branch-code">1b</span>
            <span class="branch-desc">Four limbs</span>
          </div>
          <div class="branch-target">Go to Step 2 →</div>
        </div>
      </div>
    </div>

    
    <div class="step-card" id="card-step2">
      <div class="step-header"><span>Step 2</span></div>
      <div class="branches">
        <div class="branch" id="b-2a" data-choice="2a">
          <div>
            <span class="branch-code">2a</span>
            <span class="branch-desc">Feathers</span>
          </div>
          <div class="branch-target">
            <div>🦅 Eagle <span class="latin">Aquila chrysaetos</span></div>
          </div>
        </div>
        <div class="branch" id="b-2b" data-choice="2b">
          <div>
            <span class="branch-code">2b</span>
            <span class="branch-desc">No feathers</span>
          </div>
          <div class="branch-target">Go to Step 3 →</div>
        </div>
      </div>
    </div>

    
    <div class="step-card" id="card-step3">
      <div class="step-header"><span>Step 3</span></div>
      <div class="branches">
        <div class="branch" id="b-3a" data-choice="3a">
          <div>
            <span class="branch-code">3a</span>
            <span class="branch-desc">Fur</span>
          </div>
          <div class="branch-target">
            <div>🐇 Rabbit <span class="latin">Oryctolagus cuniculus</span></div>
          </div>
        </div>
        <div class="branch" id="b-3b" data-choice="3b">
          <div>
            <span class="branch-code">3b</span>
            <span class="branch-desc">Moist, scaleless skin</span>
          </div>
          <div class="branch-target">
            <div>🐸 Frog <span class="latin">Rana temporaria</span></div>
          </div>
        </div>
      </div>
    </div>

  </div>

  
  <div class="status-bar">
    <span>Classification Path:</span>
    <div class="path-crumbs" id="pathSummary">1a → Trout</div>
  </div>

  <script>
    const animalPaths = {
      trout: {
        path: ['1a'],
        summary: '1a ➔ Salmo trutta (Trout)'
      },
      eagle: {
        path: ['1b', '2a'],
        summary: '1b ➔ 2a ➔ Aquila chrysaetos (Eagle)'
      },
      rabbit: {
        path: ['1b', '2b', '3a'],
        summary: '1b ➔ 2b ➔ 3a ➔ Oryctolagus cuniculus (Rabbit)'
      },
      frog: {
        path: ['1b', '2b', '3b'],
        summary: '1b ➔ 2b ➔ 3b ➔ Rana temporaria (Frog)'
      }
    };

    const branchToAnimal = {
      '1a': 'trout',
      '1b': 'eagle', // default branch advance
      '2a': 'eagle',
      '2b': 'rabbit',
      '3a': 'rabbit',
      '3b': 'frog'
    };

    const animalBtns = document.querySelectorAll('.animal-btn');
    const branches = document.querySelectorAll('.branch');
    const pathSummary = document.getElementById('pathSummary');

    function selectAnimal(animalKey) {
      const config = animalPaths[animalKey];
      if (!config) return;

      // Update animal buttons
      animalBtns.forEach(btn => {
        btn.classList.toggle('active', btn.dataset.animal === animalKey);
      });

      // Update branches
      branches.forEach(branch => {
        const choice = branch.dataset.choice;
        if (config.path.includes(choice)) {
          branch.classList.add('highlight');
          branch.classList.remove('dimmed');
        } else {
          branch.classList.remove('highlight');
          branch.classList.add('dimmed');
        }
      });

      // Update summary text
      pathSummary.textContent = config.summary;
    }

    // Attach click listeners to animal buttons
    animalBtns.forEach(btn => {
      btn.addEventListener('click', () => {
        selectAnimal(btn.dataset.animal);
      });
    });

    // Attach click listeners directly to branches
    branches.forEach(branch => {
      branch.addEventListener('click', () => {
        const choice = branch.dataset.choice;
        const mappedAnimal = branchToAnimal[choice];
        if (mappedAnimal) {
          selectAnimal(mappedAnimal);
        }
      });
    });

    // Initial state
    selectAnimal('trout');
  </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>Binomial Nomenclature Breakdown</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #ffffff;
      color: #1e2945;
      padding: 14px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      min-height: 100%;
      user-select: none;
    }

    /* Interactive tabs */
    .controls {
      display: flex;
      justify-content: center;
      gap: 6px;
      flex-wrap: wrap;
    }

    .tab-btn {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      color: #1e2945;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    }

    .tab-btn.active {
      background: #2563eb;
      color: #ffffff;
      border-color: #2563eb;
    }

    /* Main Name Card */
    .hero-card {
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 14px;
      padding: 16px 12px;
      text-align: center;
      box-shadow: 0 2px 8px rgba(30, 41, 69, 0.04);
    }

    .common-title {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: #64748b;
      margin-bottom: 4px;
    }

    .name-display {
      font-size: clamp(26px, 6vw, 36px);
      font-style: italic;
      font-family: "Georgia", serif;
      display: inline-flex;
      gap: 10px;
      justify-content: center;
      align-items: center;
      margin-bottom: 12px;
    }

    .word-part {
      padding: 2px 8px;
      border-radius: 8px;
      cursor: pointer;
      transition: background 0.2s ease, box-shadow 0.2s ease;
      position: relative;
    }

    .word-part.genus {
      color: #1d4ed8;
      border-bottom: 3px solid #2563eb;
    }

    .word-part.species {
      color: #047857;
      border-bottom: 3px solid #059669;
    }

    .word-part.active-part {
      background: #eff6ff;
      box-shadow: 0 0 0 2px #2563eb;
    }

    .word-part.species.active-part {
      background: #ecfdf5;
      box-shadow: 0 0 0 2px #059669;
    }

    /* Callout labels grid */
    .breakdown-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      margin-top: 4px;
      text-align: left;
    }

    .tag-card {
      padding: 10px 12px;
      border-radius: 10px;
      border: 1px solid #e2e8f0;
      background: #f8fafc;
      transition: border-color 0.2s ease, background 0.2s ease;
    }

    .tag-card.active-genus {
      border-color: #2563eb;
      background: #eff6ff;
    }

    .tag-card.active-species {
      border-color: #059669;
      background: #ecfdf5;
    }

    .tag-header {
      font-size: 14px;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 6px;
      margin-bottom: 4px;
    }

    .tag-genus .tag-header { color: #1d4ed8; }
    .tag-species .tag-header { color: #047857; }

    .tag-detail {
      font-size: 12px;
      color: #475569;
      line-height: 1.35;
    }

    /* Rules section */
    .rules-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
    }

    .rule-box {
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 10px 12px;
      background: #f8fafc;
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .rule-title {
      font-size: 12px;
      font-weight: 700;
      color: #64748b;
      text-transform: uppercase;
      letter-spacing: 0.04em;
    }

    .rule-example {
      font-family: "Georgia", serif;
      font-size: 15px;
      color: #1e2945;
      margin-top: 2px;
    }

    .rule-desc {
      font-size: 12px;
      color: #334155;
      font-weight: 500;
    }

    @media (max-width: 420px) {
      .breakdown-grid, .rules-grid {
        grid-template-columns: 1fr;
        gap: 8px;
      }
      .hero-card {
        padding: 12px 8px;
      }
    }
  </style>
</head>
<body>

  
  <div class="controls">
    <button class="tab-btn active" id="tabAll" onclick="setFocus('all')">Both Parts</button>
    <button class="tab-btn" id="tabGenus" onclick="setFocus('genus')">Genus</button>
    <button class="tab-btn" id="tabSpecies" onclick="setFocus('species')">Specific Epithet</button>
  </div>

  
  <div class="hero-card">
    <div class="common-title">Lion · Scientific Name</div>
    <div class="name-display">
      <span class="word-part genus active-part" id="wordGenus" onclick="setFocus('genus')">Panthera</span>
      <span class="word-part species active-part" id="wordSpecies" onclick="setFocus('species')">leo</span>
    </div>

    <div class="breakdown-grid">
      <div class="tag-card tag-genus active-genus" id="cardGenus">
        <div class="tag-header">↑ Genus</div>
        <div class="tag-detail"><strong>Capitalized</strong><br>Shared with tigers &amp; jaguars</div>
      </div>
      <div class="tag-card tag-species active-species" id="cardSpecies">
        <div class="tag-header">↑ Specific Epithet</div>
        <div class="tag-detail"><strong>Lowercase</strong><br>Unique identifier for lion</div>
      </div>
    </div>
  </div>

  
  <div class="rules-grid">
    <div class="rule-box">
      <span class="rule-title">Rule 1 · Print &amp; Digital</span>
      <span class="rule-desc">Italicize the entire name</span>
      <span class="rule-example"><em>Panthera leo</em></span>
    </div>
    <div class="rule-box">
      <span class="rule-title">Rule 2 · Handwritten</span>
      <span class="rule-desc">Underline separately</span>
      <span class="rule-example"><u>Panthera</u> <u>leo</u></span>
    </div>
  </div>

  <script>
    function setFocus(mode) {
      const tabAll = document.getElementById('tabAll');
      const tabGenus = document.getElementById('tabGenus');
      const tabSpecies = document.getElementById('tabSpecies');
      
      const wordGenus = document.getElementById('wordGenus');
      const wordSpecies = document.getElementById('wordSpecies');
      
      const cardGenus = document.getElementById('cardGenus');
      const cardSpecies = document.getElementById('cardSpecies');

      tabAll.classList.remove('active');
      tabGenus.classList.remove('active');
      tabSpecies.classList.remove('active');

      wordGenus.classList.remove('active-part');
      wordSpecies.classList.remove('active-part');
      cardGenus.classList.remove('active-genus');
      cardSpecies.classList.remove('active-species');

      if (mode === 'genus') {
        tabGenus.classList.add('active');
        wordGenus.classList.add('active-part');
        cardGenus.classList.add('active-genus');
      } else if (mode === 'species') {
        tabSpecies.classList.add('active');
        wordSpecies.classList.add('active-part');
        cardSpecies.classList.add('active-species');
      } else {
        tabAll.classList.add('active');
        wordGenus.classList.add('active-part');
        wordSpecies.classList.add('active-part');
        cardGenus.classList.add('active-genus');
        cardSpecies.classList.add('active-species');
      }
    }
  </script>
</body>
</html>

OGS.9.LS.6

Aligned learning resources

Related diagrams