<!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>Formal vs. Informal Communication</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      background: transparent;
      color: #1e2945;
      padding: 10px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .header-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 8px;
    }
    .badge-title {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: #64748b;
    }

    .comparison-grid {
      display: grid;
      grid-template-columns: 1fr 1.35fr;
      gap: 12px;
      align-items: start;
    }

    @media (max-width: 520px) {
      .comparison-grid {
        grid-template-columns: 1fr;
      }
    }

    /* Left Panel: Casual Sticky Note */
    .note-card {
      background: #fef9c3;
      border: 1px solid #fef08a;
      border-radius: 8px;
      padding: 14px 16px;
      box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      position: relative;
    }
    .note-tag {
      display: inline-block;
      font-size: 11px;
      font-weight: 700;
      background: rgba(161, 98, 7, 0.15);
      color: #854d0e;
      padding: 2px 6px;
      border-radius: 4px;
      margin-bottom: 8px;
    }
    .note-content {
      font-family: "Caveat", "Comic Sans MS", cursive, sans-serif;
      font-size: 17px;
      line-height: 1.4;
      color: #334155;
    }
    .note-footer {
      margin-top: 10px;
      font-size: 11px;
      color: #854d0e;
      font-weight: 500;
    }

    /* Right Panel: Formal Email */
    .email-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 12px 14px;
      box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.04);
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .email-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 6px;
      border-bottom: 1px solid #f1f5f9;
    }
    .email-tag {
      font-size: 11px;
      font-weight: 700;
      background: #e0f2fe;
      color: #0369a1;
      padding: 2px 6px;
      border-radius: 4px;
    }

    .email-body {
      font-size: 13.5px;
      line-height: 1.45;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      gap: 7px;
    }

    /* Interactive Section Pins */
    .section-row {
      position: relative;
      display: flex;
      align-items: flex-start;
      gap: 8px;
      padding: 4px 6px;
      border-radius: 6px;
      cursor: pointer;
      transition: background 0.2s ease;
    }
    .section-row:hover {
      background: #f8fafc;
    }
    .section-row.active {
      background: #eff6ff;
      box-shadow: inset 0 0 0 1.5px #0284c7;
    }

    .pin {
      flex-shrink: 0;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: #0284c7;
      color: #ffffff;
      font-size: 11px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-top: 1px;
      transition: transform 0.2s ease, background 0.2s ease;
    }
    .section-row.active .pin {
      background: #0369a1;
      transform: scale(1.1);
    }

    .section-text {
      flex: 1;
    }

    /* Explanation Panel */
    .info-box {
      background: #f8fafc;
      border: 1px solid #cbd5e1;
      border-left: 4px solid #0284c7;
      border-radius: 6px;
      padding: 10px 12px;
      min-height: 52px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .info-title {
      font-size: 12px;
      font-weight: 700;
      color: #0369a1;
      margin-bottom: 2px;
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .info-desc {
      font-size: 13px;
      color: #334155;
      line-height: 1.35;
    }
  </style>
</head>
<body>

  <div class="header-row">
    <span class="badge-title">Register Comparison</span>
    <span style="font-size: 12px; color: #64748b;">Tap numbered pins to inspect</span>
  </div>

  <div class="comparison-grid">
    
    <div class="note-card">
      <span class="note-tag">Casual Note</span>
      <div class="note-content">
        Hey!<br>
        Leave the soccer ball by the bench.<br>
        Thx - Leo
      </div>
      <div class="note-footer">
        ⚡ Fast &amp; casual for peers
      </div>
    </div>

    
    <div class="email-card">
      <div class="email-header">
        <span class="email-tag">Formal Email</span>
        <span style="font-size: 11px; color: #94a3b8;">Coach Martinez</span>
      </div>

      <div class="email-body">
        <div class="section-row active" data-pin="1">
          <div class="pin">1</div>
          <div class="section-text"><strong>Dear Coach Martinez,</strong></div>
        </div>

        <div class="section-row" data-pin="2">
          <div class="pin">2</div>
          <div class="section-text">I am writing to request permission to borrow three soccer balls for practice.</div>
        </div>

        <div class="section-row" data-pin="3">
          <div class="pin">3</div>
          <div class="section-text">Please let me know if you would like me to pick them up after school.</div>
        </div>

        <div class="section-row" data-pin="4">
          <div class="pin">4</div>
          <div class="section-text">
            Sincerely,<br>
            <strong>Leo Vance</strong><br>
            <span style="font-size: 11.5px; color: #64748b;">Grade 6 Captain</span>
          </div>
        </div>
      </div>
    </div>
  </div>

  
  <div class="info-box" id="infoBox">
    <div class="info-title" id="infoTitle">Pin 1: Salutation</div>
    <div class="info-desc" id="infoDesc">Shows respect and sets a polite, professional tone.</div>
  </div>

  <script src="{{VENDOR_CDN}}/classace-diagram.js"></script>
  <script>
    const explanations = {
      1: {
        title: "Pin 1: Salutation",
        desc: "Shows respect and addresses the recipient with proper title and tone."
      },
      2: {
        title: "Pin 2: Purpose Statement",
        desc: "Clearly states the main request right away so the reader understands immediately."
      },
      3: {
        title: "Pin 3: Call to Action",
        desc: "Guides the next step and offers practical coordination politely."
      },
      4: {
        title: "Pin 4: Sign-off & Full Name",
        desc: "Includes formal closing, full identity, and context/role for clarity."
      }
    };

    const rows = $$('.section-row');
    const titleEl = $('#infoTitle');
    const descEl = $('#infoDesc');

    rows.forEach(row => {
      onTap(row, () => {
        rows.forEach(r => r.classList.remove('active'));
        row.classList.add('active');
        const pinId = row.dataset.pin;
        const data = explanations[pinId];
        if (data) {
          titleEl.textContent = data.title;
          descEl.textContent = data.desc;
        }
      });
    });
  </script>
</body>
</html>

Understanding Formal vs. Informal Communication Registers

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

    body {
      background: #ffffff;
      color: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .header-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 4px;
    }

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

    .sub {
      font-size: 13px;
      color: #6b7280;
    }

    .grid-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }

    @media (max-width: 540px) {
      .grid-container {
        grid-template-columns: 1fr;
        gap: 12px;
      }
    }

    /* Card Wrapper */
    .register-card {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .register-card.informal {
      border-top: 4px solid #10b981;
    }

    .register-card.formal {
      border-top: 4px solid #2563eb;
    }

    .card-title-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .card-label {
      font-size: 14px;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .audience-pill {
      font-size: 11px;
      font-weight: 600;
      padding: 2px 8px;
      border-radius: 12px;
      background: #e2e8f0;
      color: #475569;
    }

    /* Chat UI for Informal */
    .chat-view {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 10px;
      min-height: 150px;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      gap: 8px;
    }

    .chat-bubble {
      align-self: flex-end;
      background: #10b981;
      color: #ffffff;
      padding: 8px 12px;
      border-radius: 14px 14px 2px 14px;
      font-size: 13.5px;
      line-height: 1.4;
      max-width: 90%;
      box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    }

    .chat-bubble .hl-token {
      background: rgba(255, 255, 255, 0.3);
      padding: 0 3px;
      border-radius: 3px;
      font-weight: 600;
      text-decoration: underline;
    }

    /* Email UI for Formal */
    .email-view {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 10px;
      font-size: 12.5px;
      line-height: 1.45;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .email-field {
      border-bottom: 1px solid #f1f5f9;
      padding-bottom: 4px;
      color: #64748b;
      font-size: 12px;
    }

    .email-field strong {
      color: #1e2945;
    }

    .email-body {
      color: #334155;
      display: flex;
      flex-direction: column;
      gap: 5px;
    }

    .hl-section {
      transition: background 0.2s ease;
      border-radius: 3px;
      padding: 1px 2px;
    }

    .active-hl {
      background: #fef08a !important;
      color: #0f172a !important;
    }

    /* Feature Badges */
    .badge-group {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .badge-btn {
      font-size: 11px;
      font-weight: 600;
      padding: 4px 8px;
      border-radius: 6px;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: #475569;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: background 0.15s, border-color 0.15s, color 0.15s;
    }

    .badge-btn:hover {
      background: #f1f5f9;
      color: #1e2945;
    }

    .badge-btn.selected {
      background: #1e2945;
      color: #ffffff;
      border-color: #1e2945;
    }

    .badge-btn.informal-tag.selected {
      background: #059669;
      border-color: #059669;
      color: #ffffff;
    }

    .badge-btn.formal-tag.selected {
      background: #2563eb;
      border-color: #2563eb;
      color: #ffffff;
    }
  </style>
</head>
<body>

  <div class="header-bar">
    <div>
      <div class="title">Goal: Requesting Missed Homework</div>
      <div class="sub">Tap features to highlight key elements</div>
    </div>
  </div>

  <div class="grid-container">
    
    <div class="register-card informal">
      <div class="card-title-row">
        <span class="card-label">💬 Informal Register</span>
        <span class="audience-pill">Peer: Maya</span>
      </div>

      <div class="chat-view">
        <div class="chat-bubble">
          <span class="hl-section" id="inf-greet">hey maya</span> missed science <span class="hl-section" id="inf-words">2day</span>, what page was the <span class="hl-section" id="inf-words-2">hw</span>?? send pics <span class="hl-section" id="inf-words-3">plz</span>!
        </div>
      </div>

      <div class="badge-group">
        <button class="badge-btn informal-tag" onclick="highlight('inf', 'words')">✦ Shorthand (2day, hw, plz)</button>
        <button class="badge-btn informal-tag" onclick="highlight('inf', 'greet')">✦ Casual greeting</button>
        <button class="badge-btn informal-tag" onclick="highlight('inf', 'tone')">✦ Fast, relaxed tone</button>
      </div>
    </div>

    
    <div class="register-card formal">
      <div class="card-title-row">
        <span class="card-label">✉️ Formal Register</span>
        <span class="audience-pill">Teacher: Mr. Sterling</span>
      </div>

      <div class="email-view">
        <div class="email-field" id="form-subj">
          <strong>Subject:</strong> Missed Assignment - Tuesday, Oct 14
        </div>
        <div class="email-body">
          <div class="hl-section" id="form-salut">Dear Mr. Sterling,</div>
          <div class="hl-section" id="form-sent-1">I was absent from science class today due to a medical appointment. Could you please let me know which textbook pages and worksheets were assigned?</div>
          <div class="hl-section" id="form-sent-2">I will complete the work before Thursday.</div>
          <div class="hl-section" id="form-sign">Thank you for your time,<br><strong>Jordan Taylor</strong></div>
        </div>
      </div>

      <div class="badge-group">
        <button class="badge-btn formal-tag" onclick="highlight('form', 'subj')">✓ Clear subject line</button>
        <button class="badge-btn formal-tag" onclick="highlight('form', 'salut')">✓ Respectful salutation</button>
        <button class="badge-btn formal-tag" onclick="highlight('form', 'sent')">✓ Complete sentences</button>
        <button class="badge-btn formal-tag" onclick="highlight('form', 'sign')">✓ Professional sign-off</button>
      </div>
    </div>
  </div>

  <script>
    let activeCategory = null;

    function clearHighlights() {
      document.querySelectorAll('.hl-section, .email-field, .chat-bubble').forEach(el => {
        el.classList.remove('active-hl');
      });
      document.querySelectorAll('.badge-btn').forEach(btn => {
        btn.classList.remove('selected');
      });
    }

    function highlight(type, key) {
      if (activeCategory === type + '-' + key) {
        clearHighlights();
        activeCategory = null;
        return;
      }
      clearHighlights();
      activeCategory = type + '-' + key;

      event.currentTarget.classList.add('selected');

      if (type === 'inf') {
        if (key === 'words') {
          document.getElementById('inf-words').classList.add('active-hl');
          document.getElementById('inf-words-2').classList.add('active-hl');
          document.getElementById('inf-words-3').classList.add('active-hl');
        } else if (key === 'greet') {
          document.getElementById('inf-greet').classList.add('active-hl');
        } else if (key === 'tone') {
          document.getElementById('inf-greet').classList.add('active-hl');
          document.getElementById('inf-words').classList.add('active-hl');
          document.getElementById('inf-words-2').classList.add('active-hl');
          document.getElementById('inf-words-3').classList.add('active-hl');
        }
      } else if (type === 'form') {
        if (key === 'subj') {
          document.getElementById('form-subj').classList.add('active-hl');
        } else if (key === 'salut') {
          document.getElementById('form-salut').classList.add('active-hl');
        } else if (key === 'sent') {
          document.getElementById('form-sent-1').classList.add('active-hl');
          document.getElementById('form-sent-2').classList.add('active-hl');
        } else if (key === 'sign') {
          document.getElementById('form-sign').classList.add('active-hl');
        }
      }
    }
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Communication Register Spectrum</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: 10px 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      user-select: none;
      -webkit-user-select: none;
    }

    .container {
      width: 100%;
      max-width: 520px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    /* Header */
    .header {
      text-align: center;
    }

    .title {
      font-size: 18px;
      font-weight: 800;
      color: #1e2945;
      letter-spacing: -0.3px;
    }

    .subtitle {
      font-size: 12px;
      color: #64748b;
      margin-top: 2px;
    }

    /* Spectrum Bar with Endpoints */
    .spectrum-container {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .spectrum-labels {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 11px;
      font-weight: 700;
    }

    .label-left {
      color: #059669;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .label-right {
      color: #2563eb;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .spectrum-bar {
      width: 100%;
      height: 6px;
      border-radius: 3px;
      background: linear-gradient(90deg, #10b981 0%, #0ea5e9 50%, #2563eb 100%);
    }

    /* Interactive 3-stop Switcher */
    .track-wrapper {
      position: relative;
      display: flex;
      background: #e2e8f0;
      border-radius: 24px;
      padding: 3px;
      height: 42px;
    }

    .slider-thumb {
      position: absolute;
      top: 3px;
      left: 3px;
      width: calc((100% - 6px) / 3);
      height: calc(100% - 6px);
      background: #ffffff;
      border-radius: 20px;
      box-shadow: 0 2px 6px rgba(30, 41, 69, 0.15);
      transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
      z-index: 1;
    }

    .nav-btn {
      position: relative;
      z-index: 2;
      flex: 1;
      border: none;
      background: transparent;
      font-size: 12px;
      font-weight: 700;
      color: #64748b;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 5px;
      height: 100%;
      transition: color 0.2s ease;
      white-space: nowrap;
    }

    .nav-btn.active {
      color: #1e2945;
    }

    /* Card Stack Layout (auto-height snug fit) */
    .display-area {
      display: grid;
      grid-template-columns: 1fr;
      position: relative;
    }

    .register-card {
      grid-area: 1 / 1;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 14px;
      padding: 14px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.25s ease, visibility 0.25s ease;
    }

    .register-card.active {
      opacity: 1;
      visibility: visible;
    }

    .card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid #f1f5f9;
      padding-bottom: 8px;
    }

    .card-title {
      font-size: 15px;
      font-weight: 700;
      color: #1e2945;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .badge {
      font-size: 11px;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 10px;
    }

    .badge-casual { background: #d1fae5; color: #065f46; }
    .badge-semi { background: #e0f2fe; color: #0369a1; }
    .badge-formal { background: #dbeafe; color: #1e40af; }

    .grid-info {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
    }

    .info-box {
      background: #f8fafc;
      border-radius: 8px;
      padding: 8px 10px;
      border: 1px solid #edf2f7;
    }

    .info-label {
      font-size: 10px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: #64748b;
      margin-bottom: 3px;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .info-items {
      font-size: 12px;
      line-height: 1.35;
      color: #1e2945;
      font-weight: 500;
    }

    .sample-preview {
      background: #f8fafc;
      border-radius: 8px;
      padding: 8px 12px;
      font-size: 12px;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      color: #334155;
      border-left: 4px solid #94a3b8;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .casual-border { border-left-color: #10b981; }
    .semi-border { border-left-color: #0ea5e9; }
    .formal-border { border-left-color: #2563eb; }

    @media (max-width: 380px) {
      .nav-btn {
        font-size: 11px;
        gap: 3px;
      }
      .grid-info {
        grid-template-columns: 1fr;
        gap: 6px;
      }
      .title {
        font-size: 16px;
      }
    }
  </style>
</head>
<body>

  <div class="container">
    <div class="header">
      <div class="title">Communication Register Spectrum</div>
      <div class="subtitle">Select a register level to explore audiences and traits</div>
    </div>

    
    <div class="spectrum-container">
      <div class="spectrum-labels">
        <span class="label-left">📱 Casual / Informal 😊</span>
        <span class="label-right">✉️ Professional / Formal 📋</span>
      </div>
      <div class="spectrum-bar"></div>
    </div>

    
    <div class="track-wrapper">
      <div class="slider-thumb" id="thumb"></div>
      <button class="nav-btn active" onclick="setRegister(0)" id="btn-0" aria-label="Casual register">💬 Casual</button>
      <button class="nav-btn" onclick="setRegister(1)" id="btn-1" aria-label="Semi-formal register">👥 Semi-Formal</button>
      <button class="nav-btn" onclick="setRegister(2)" id="btn-2" aria-label="Formal register">📋 Formal</button>
    </div>

    
    <div class="display-area">
      
      <div class="register-card active" id="card-0">
        <div class="card-header">
          <div class="card-title">📱 Casual / Informal</div>
          <span class="badge badge-casual">Relaxed & Friendly</span>
        </div>
        <div class="grid-info">
          <div class="info-box">
            <div class="info-label">👥 Audiences</div>
            <div class="info-items">Best friends, siblings, gaming buddies</div>
          </div>
          <div class="info-box">
            <div class="info-label">✨ Characteristics</div>
            <div class="info-items">Slang, emojis, sentence fragments, shorthand</div>
          </div>
        </div>
        <div class="sample-preview casual-border">
          <span>💬</span> "yo where r the slips at?? 🔥"
        </div>
      </div>

      
      <div class="register-card" id="card-1">
        <div class="card-header">
          <div class="card-title">🏫 Semi-Formal</div>
          <span class="badge badge-semi">Polite & Direct</span>
        </div>
        <div class="grid-info">
          <div class="info-box">
            <div class="info-label">👥 Audiences</div>
            <div class="info-items">Teachers, classmates, coaches, colleagues</div>
          </div>
          <div class="info-box">
            <div class="info-label">✨ Characteristics</div>
            <div class="info-items">Polite phrasing, clear sentences, standard words</div>
          </div>
        </div>
        <div class="sample-preview semi-border">
          <span>💬</span> "Hi Mr. Davis, do you have the permission slips?"
        </div>
      </div>

      
      <div class="register-card" id="card-2">
        <div class="card-header">
          <div class="card-title">✉️ Professional / Formal</div>
          <span class="badge badge-formal">Official & Structured</span>
        </div>
        <div class="grid-info">
          <div class="info-box">
            <div class="info-label">👥 Audiences</div>
            <div class="info-items">Principals, future employers, city officials</div>
          </div>
          <div class="info-box">
            <div class="info-label">✨ Characteristics</div>
            <div class="info-items">Polite greetings, complete sentences, standard spelling</div>
          </div>
        </div>
        <div class="sample-preview formal-border">
          <span>💬</span> "Dear Principal Davis, please send the requested forms."
        </div>
      </div>
    </div>
  </div>

  <script>
    function setRegister(index) {
      const thumb = document.getElementById('thumb');
      thumb.style.transform = `translateX(${index * 100}%)`;

      for (let i = 0; i < 3; i++) {
        const btn = document.getElementById(`btn-${i}`);
        const card = document.getElementById(`card-${i}`);
        btn.classList.toggle('active', i === index);
        card.classList.toggle('active', i === index);
      }
    }
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      width: 100%;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: transparent;
      color: #1e2945;
      padding: 10px 8px;
    }

    .header-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 8px;
      padding: 0 4px;
    }

    .col-label {
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.6px;
    }

    .label-casual {
      color: #b45309;
    }

    .label-formal {
      color: #0f2744;
      text-align: right;
    }

    .rows-container {
      display: flex;
      flex-direction: column;
      gap: 7px;
    }

    .swap-row {
      cursor: pointer;
      display: flex;
      flex-direction: column;
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 10px;
      padding: 7px 10px;
      transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
      user-select: none;
    }

    .swap-row:hover {
      border-color: #cbd5e1;
    }

    .swap-row.active {
      border-color: #0ea5e9;
      box-shadow: 0 0 0 1.5px #0ea5e9;
      background: #f8fafc;
    }

    .pair-line {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      gap: 6px;
    }

    /* Casual Pill */
    .casual-bubble {
      background: #fef3c7;
      border: 1px solid #fde68a;
      border-radius: 16px;
      padding: 6px 10px;
      font-size: 13px;
      font-weight: 500;
      color: #78350f;
      display: flex;
      align-items: center;
      gap: 5px;
      line-height: 1.2;
    }

    .bubble-icon {
      font-size: 13px;
      flex-shrink: 0;
    }

    /* Transition Arrow */
    .arrow-box {
      display: flex;
      justify-content: center;
      align-items: center;
      color: #94a3b8;
      font-size: 15px;
      font-weight: bold;
      transition: color 0.2s ease;
    }

    .swap-row.active .arrow-box {
      color: #0ea5e9;
    }

    /* Formal Badge */
    .formal-badge {
      background: #ffffff;
      border: 1.5px solid #0f2744;
      border-left: 3.5px solid #0f2744;
      border-radius: 6px;
      padding: 6px 9px;
      font-family: Georgia, "Times New Roman", serif;
      font-size: 13px;
      font-weight: 500;
      color: #0f2744;
      line-height: 1.2;
    }

    /* Change Tag */
    .rule-tag {
      margin-top: 5px;
      font-size: 11px;
      font-weight: 600;
      color: #0284c7;
      background: #e0f2fe;
      border-radius: 4px;
      padding: 3px 6px;
      align-self: flex-start;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .swap-row:not(.active) .rule-tag {
      color: #64748b;
      background: #f1f5f9;
    }

    @media (max-width: 440px) {
      .casual-bubble, .formal-badge {
        font-size: 12px;
        padding: 5px 7px;
      }
      .pair-line {
        gap: 4px;
      }
      .rule-tag {
        font-size: 10px;
        padding: 2px 5px;
      }
    }
  </style>
</head>
<body>

  <div class="header-row">
    <span class="col-label label-casual">💬 Casual (Text/Chat)</span>
    <span class="col-label label-formal">✉️ Formal (Email/Letter)</span>
  </div>

  <div class="rows-container" id="rowsContainer">
    
    <div class="swap-row active" onclick="selectRow(0)">
      <div class="pair-line">
        <div class="casual-bubble">
          <span class="bubble-icon">👋</span>
          <span>Hey / Sup</span>
        </div>
        <div class="arrow-box">→</div>
        <div class="formal-badge">
          Dear Ms. Carter,
        </div>
      </div>
      <div class="rule-tag">
        ✦ Respectful Salutation & Title
      </div>
    </div>

    
    <div class="swap-row" onclick="selectRow(1)">
      <div class="pair-line">
        <div class="casual-bubble">
          <span class="bubble-icon">❓</span>
          <span>I gotta ask about...</span>
        </div>
        <div class="arrow-box">→</div>
        <div class="formal-badge">
          I am writing to inquire regarding...
        </div>
      </div>
      <div class="rule-tag">
        ✦ Expand Contractions & State Purpose
      </div>
    </div>

    
    <div class="swap-row" onclick="selectRow(2)">
      <div class="pair-line">
        <div class="casual-bubble">
          <span class="bubble-icon">⚡</span>
          <span>Lemme know ASAP</span>
        </div>
        <div class="arrow-box">→</div>
        <div class="formal-badge">
          Please reply at your earliest convenience.
        </div>
      </div>
      <div class="rule-tag">
        ✦ Polite Phrasing & Spell Out Slang
      </div>
    </div>

    
    <div class="swap-row" onclick="selectRow(3)">
      <div class="pair-line">
        <div class="casual-bubble">
          <span class="bubble-icon">✌️</span>
          <span>Thx!</span>
        </div>
        <div class="arrow-box">→</div>
        <div class="formal-badge">
          Sincerely, / Best regards,
        </div>
      </div>
      <div class="rule-tag">
        ✦ Professional Sign-off
      </div>
    </div>
  </div>

  <script>
    function selectRow(index) {
      const rows = document.querySelectorAll('.swap-row');
      rows.forEach((row, i) => {
        if (i === index) {
          row.classList.add('active');
        } else {
          row.classList.remove('active');
        }
      });
    }
  </script>
</body>
</html>

OGE.6.W.4

Aligned learning resources

Related diagrams