<!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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    }

    body {
      background: transparent;
      color: #1e293b;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    /* Top rule pill */
    .rule-pill {
      align-self: center;
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      border-radius: 9999px;
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 700;
      color: #334155;
      display: flex;
      align-items: center;
      gap: 6px;
      text-align: center;
    }

    .rule-pill span {
      color: #059669;
    }

    /* Split layout */
    .comparison-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 12px;
      width: 100%;
    }

    .column {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .column-header {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      padding: 6px 8px;
      border-radius: 6px;
    }

    .col-cap .column-header {
      background: #ecfdf5;
      color: #065f46;
      border: 1px solid #a7f3d0;
    }

    .col-low .column-header {
      background: #f8fafc;
      color: #475569;
      border: 1px solid #e2e8f0;
    }

    /* Example items */
    .item-card {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 10px 12px;
      display: flex;
      flex-direction: column;
      gap: 4px;
      cursor: pointer;
      transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
      user-select: none;
    }

    .item-card:hover {
      background: #ffffff;
      border-color: #cbd5e1;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
    }

    .col-cap .item-card.active {
      background: #ffffff;
      border-color: #10b981;
      box-shadow: 0 0 0 1px #10b981;
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    .col-low .item-card.active {
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    .phrase-line {
      font-size: 15px;
      font-weight: 600;
      color: #0f172a;
      display: flex;
      align-items: baseline;
      gap: 2px;
      flex-wrap: wrap;
    }

    /* Letter highlights */
    .cap-letter {
      color: #059669;
      font-weight: 800;
      background: #d1fae5;
      padding: 0 3px;
      border-radius: 3px;
      border-bottom: 2px solid #059669;
    }

    .low-word {
      color: #475569;
      text-decoration: underline dotted #94a3b8;
      text-underline-offset: 3px;
    }

    .rule-note {
      font-size: 12px;
      color: #64748b;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .badge {
      font-size: 10px;
      font-weight: 700;
      text-transform: uppercase;
      padding: 2px 6px;
      border-radius: 4px;
    }

    .col-cap .badge {
      background: #ecfdf5;
      color: #047857;
    }

    .col-low .badge {
      background: #e2e8f0;
      color: #475569;
    }

    /* Interactive hint */
    .tip-box {
      font-size: 11px;
      color: #334155;
      background: #f1f5f9;
      padding: 6px 8px;
      border-radius: 4px;
      margin-top: 4px;
      border-left: 3px solid #64748b;
      display: none;
    }

    .item-card.active .tip-box {
      display: block;
    }

    .col-cap .item-card.active .tip-box {
      border-left-color: #059669;
      background: #f0fdf4;
    }

    .footer-prompt {
      text-align: center;
      font-size: 11px;
      color: #94a3b8;
      font-weight: 500;
    }
  </style>
</head>
<body>

  <div class="rule-pill">
    <span>Rule at a Glance:</span> Named Eras vs. Generic Periods
  </div>

  <div class="comparison-grid">
    
    <div class="column col-cap">
      <div class="column-header">
        <span>✓</span> Capitalize Recognized Eras & Events
      </div>

      <div class="item-card active" onclick="toggleCard(this)">
        <div class="phrase-line">
          the <span class="cap-letter">M</span>iddle <span class="cap-letter">A</span>ges
        </div>
        <div class="rule-note">
          <span>Named historical period</span>
          <span class="badge">Proper Era</span>
        </div>
        <div class="tip-box">Specific named epoch in world history.</div>
      </div>

      <div class="item-card" onclick="toggleCard(this)">
        <div class="phrase-line">
          the <span class="cap-letter">I</span>ndustrial <span class="cap-letter">R</span>evolution
        </div>
        <div class="rule-note">
          <span>Recognized historical event</span>
          <span class="badge">Proper Event</span>
        </div>
        <div class="tip-box">Official title of a singular historic transformation.</div>
      </div>

      <div class="item-card" onclick="toggleCard(this)">
        <div class="phrase-line">
          the <span class="cap-letter">B</span>ronze <span class="cap-letter">A</span>ge
        </div>
        <div class="rule-note">
          <span>Formal archaeological era</span>
          <span class="badge">Proper Era</span>
        </div>
        <div class="tip-box">Standard archaeological division of human prehistory.</div>
      </div>
    </div>

    
    <div class="column col-low">
      <div class="column-header">
        <span>⊘</span> Lowercase Centuries & Generic Times
      </div>

      <div class="item-card active" onclick="toggleCard(this)">
        <div class="phrase-line">
          the <span class="low-word">fifteenth</span> <span class="low-word">century</span>
        </div>
        <div class="rule-note">
          <span>Ordinal century number</span>
          <span class="badge">Generic</span>
        </div>
        <div class="tip-box">Numbered and spelled-out centuries stay lowercase.</div>
      </div>

      <div class="item-card" onclick="toggleCard(this)">
        <div class="phrase-line">
          <span class="low-word">ancient</span> <span class="low-word">times</span>
        </div>
        <div class="rule-note">
          <span>Non-specific period</span>
          <span class="badge">Generic</span>
        </div>
        <div class="tip-box">General descriptive span, not a formal proper noun.</div>
      </div>

      <div class="item-card" onclick="toggleCard(this)">
        <div class="phrase-line">
          an <span class="low-word">era</span> of rapid growth
        </div>
        <div class="rule-note">
          <span>Descriptive phrase</span>
          <span class="badge">Generic</span>
        </div>
        <div class="tip-box">The word "era" alone is a regular common noun.</div>
      </div>
    </div>
  </div>

  <div class="footer-prompt">Tap any example to inspect the capitalization reason</div>

  <script>
    function toggleCard(el) {
      const col = el.closest('.column');
      col.querySelectorAll('.item-card').forEach(c => {
        if (c !== el) c.classList.remove('active');
      });
      el.classList.toggle('active');
    }
  </script>
</body>
</html>

Standard Capitalization Rules for Proper Nouns, Titles, and Acronyms

<!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>Title Capitalization Rules</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: #ffffff;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    /* Filter / Tab Bar */
    .controls {
      display: flex;
      justify-content: center;
      gap: 6px;
      flex-wrap: wrap;
    }
    .filter-btn {
      appearance: none;
      border: 1px solid #e2e8f0;
      background: #f8fafc;
      color: #475569;
      padding: 6px 12px;
      border-radius: 9999px;
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .filter-btn:hover {
      background: #f1f5f9;
      color: #1e2945;
    }
    .filter-btn.active {
      background: #2563eb;
      color: #ffffff;
      border-color: #2563eb;
    }

    /* Example Display Cards */
    .example-card {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .card-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      color: #64748b;
      padding-bottom: 4px;
      border-bottom: 1px solid #e2e8f0;
    }

    /* Word Flow Grid */
    .words-container {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      align-items: stretch;
    }

    .word-unit {
      flex: 1 1 calc(33.333% - 8px);
      min-width: 90px;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 8px 6px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      gap: 4px;
      transition: opacity 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
      cursor: pointer;
    }
    .word-unit:hover {
      box-shadow: 0 2px 6px rgba(0,0,0,0.06);
    }
    .word-unit.dimmed {
      opacity: 0.3;
      transform: scale(0.97);
    }

    .word-text {
      font-size: 18px;
      font-weight: 700;
      line-height: 1.2;
    }
    .cap-letter {
      color: #2563eb;
      text-decoration: underline;
      text-underline-offset: 3px;
      text-decoration-thickness: 2px;
    }
    .low-word {
      color: #64748b;
      font-style: italic;
    }

    .role-tag {
      font-size: 11px;
      font-weight: 600;
      color: #334155;
      line-height: 1.2;
    }

    .status-badge {
      font-size: 10px;
      font-weight: 700;
      text-transform: uppercase;
      padding: 2px 6px;
      border-radius: 4px;
      letter-spacing: 0.02em;
    }
    .badge-cap {
      background: #dbeafe;
      color: #1d4ed8;
    }
    .badge-low {
      background: #f1f5f9;
      color: #64748b;
      border: 1px dashed #cbd5e1;
    }

    @media (max-width: 480px) {
      .word-unit {
        flex: 1 1 calc(50% - 6px);
        min-width: 80px;
        padding: 6px 4px;
      }
      .word-text {
        font-size: 16px;
      }
      .role-tag {
        font-size: 10.5px;
      }
    }
  </style>
</head>
<body>

  <div class="controls">
    <button class="filter-btn active" data-filter="all">All Words</button>
    <button class="filter-btn" data-filter="cap">Capitalized Only</button>
    <button class="filter-btn" data-filter="low">Lowercase Only</button>
  </div>

  
  <div class="example-card">
    <div class="card-header">
      <span>Book Title 1</span>
      <span>Hemingway</span>
    </div>
    <div class="words-container">
      <div class="word-unit is-cap" data-type="cap">
        <span class="word-text"><span class="cap-letter">T</span>he</span>
        <span class="role-tag">First Word</span>
        <span class="status-badge badge-cap">Capitalized</span>
      </div>
      <div class="word-unit is-cap" data-type="cap">
        <span class="word-text"><span class="cap-letter">O</span>ld</span>
        <span class="role-tag">Adjective</span>
        <span class="status-badge badge-cap">Capitalized</span>
      </div>
      <div class="word-unit is-cap" data-type="cap">
        <span class="word-text"><span class="cap-letter">M</span>an</span>
        <span class="role-tag">Noun</span>
        <span class="status-badge badge-cap">Capitalized</span>
      </div>
      <div class="word-unit is-low" data-type="low">
        <span class="word-text low-word">and</span>
        <span class="role-tag">Conjunction</span>
        <span class="status-badge badge-low">Lowercase</span>
      </div>
      <div class="word-unit is-low" data-type="low">
        <span class="word-text low-word">the</span>
        <span class="role-tag">Article</span>
        <span class="status-badge badge-low">Lowercase</span>
      </div>
      <div class="word-unit is-cap" data-type="cap">
        <span class="word-text"><span class="cap-letter">S</span>ea</span>
        <span class="role-tag">Last Word</span>
        <span class="status-badge badge-cap">Capitalized</span>
      </div>
    </div>
  </div>

  
  <div class="example-card">
    <div class="card-header">
      <span>Book Title 2</span>
      <span>Lee</span>
    </div>
    <div class="words-container">
      <div class="word-unit is-cap" data-type="cap">
        <span class="word-text"><span class="cap-letter">T</span>o</span>
        <span class="role-tag">First Word</span>
        <span class="status-badge badge-cap">Capitalized</span>
      </div>
      <div class="word-unit is-cap" data-type="cap">
        <span class="word-text"><span class="cap-letter">K</span>ill</span>
        <span class="role-tag">Verb</span>
        <span class="status-badge badge-cap">Capitalized</span>
      </div>
      <div class="word-unit is-low" data-type="low">
        <span class="word-text low-word">a</span>
        <span class="role-tag">Article</span>
        <span class="status-badge badge-low">Lowercase</span>
      </div>
      <div class="word-unit is-cap" data-type="cap">
        <span class="word-text"><span class="cap-letter">M</span>ockingbird</span>
        <span class="role-tag">Noun / Last</span>
        <span class="status-badge badge-cap">Capitalized</span>
      </div>
    </div>
  </div>

  <script>
    const filterButtons = document.querySelectorAll('.filter-btn');
    const wordUnits = document.querySelectorAll('.word-unit');

    filterButtons.forEach(btn => {
      btn.addEventListener('click', () => {
        filterButtons.forEach(b => b.classList.remove('active'));
        btn.classList.add('active');

        const filter = btn.getAttribute('data-filter');
        wordUnits.forEach(unit => {
          const type = unit.getAttribute('data-type');
          if (filter === 'all' || filter === type) {
            unit.classList.remove('dimmed');
          } else {
            unit.classList.add('dimmed');
          }
        });
      });
    });

    wordUnits.forEach(unit => {
      unit.addEventListener('click', () => {
        const type = unit.getAttribute('data-type');
        const targetBtn = document.querySelector(`.filter-btn[data-filter="${type}"]`);
        if (targetBtn) targetBtn.click();
      });
    });
  </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>Capitalization: Direction vs. Region</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: transparent;
      color: #1e2945;
      padding: 10px 14px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
      box-sizing: border-box;
      user-select: none;
    }

    .container {
      width: 100%;
      max-width: 680px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    /* Decision Check Header Banner */
    .decision-prompt {
      text-align: center;
      padding: 6px 12px;
      font-size: 13px;
      font-weight: 600;
      color: #475569;
      background: rgba(241, 245, 249, 0.8);
      border-radius: 20px;
      border: 1px dashed #cbd5e1;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .decision-prompt strong {
      color: #0f172a;
    }

    .prompt-tag {
      background: #0284c7;
      color: #ffffff;
      font-size: 10px;
      font-weight: 700;
      text-transform: uppercase;
      padding: 2px 7px;
      border-radius: 10px;
      letter-spacing: 0.4px;
    }

    /* Two-Column Comparison Layout */
    .comparison-grid {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: stretch;
      gap: 12px;
      width: 100%;
    }

    /* Columns - No card wrappers, clean transparent layout */
    .rule-col {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      padding: 6px 4px;
      cursor: pointer;
      border-radius: 8px;
      transition: background-color 0.4s ease;
    }

    .rule-col:focus-visible {
      outline: 2px solid #0284c7;
      outline-offset: 2px;
    }

    /* Central Divider Bridge */
    .divider-bridge {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      position: relative;
    }

    .divider-line {
      width: 1px;
      flex-grow: 1;
      background: linear-gradient(to bottom, transparent, #cbd5e1 15%, #cbd5e1 85%, transparent);
    }

    .vs-node {
      font-size: 10px;
      font-weight: 800;
      color: #64748b;
      background: #ffffff;
      border: 1px solid #cbd5e1;
      width: 26px;
      height: 26px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 8px 0;
      box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    }

    /* Rule Badges */
    .badge {
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.3px;
      padding: 4px 10px;
      border-radius: 999px;
      margin-bottom: 8px;
      display: inline-flex;
      align-items: center;
      gap: 5px;
      transition: all 0.3s ease;
    }

    .badge-lower {
      background: #f1f5f9;
      color: #475569;
      border: 1px solid #cbd5e1;
    }

    .col-left.active .badge-lower {
      background: #e2e8f0;
      border-color: #94a3b8;
      color: #1e293b;
    }

    .badge-upper {
      background: #e0f2fe;
      color: #0284c7;
      border: 1px solid #bae6fd;
    }

    .col-right.active .badge-upper {
      background: #0284c7;
      color: #ffffff;
      border-color: #0284c7;
    }

    /* Visual Illustration Box */
    .visual-stage {
      width: 100%;
      height: 120px;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
    }

    .visual-stage svg {
      width: 100%;
      height: 100%;
      max-height: 120px;
    }

    /* Sentences */
    .sentence-display {
      font-size: 14px;
      font-weight: 600;
      color: #1e2945;
      margin-top: 8px;
      line-height: 1.4;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      gap: 4px;
    }

    .pill-lower {
      background: #f1f5f9;
      color: #334155;
      padding: 2px 7px;
      border-radius: 5px;
      border: 1px dashed #94a3b8;
      font-weight: 700;
      transition: all 0.3s ease;
    }

    .col-left.active .pill-lower {
      background: #cbd5e1;
      border-color: #64748b;
      color: #0f172a;
    }

    .pill-upper {
      background: #e0f2fe;
      color: #0284c7;
      padding: 2px 7px;
      border-radius: 5px;
      border: 1px solid #38bdf8;
      font-weight: 700;
      transition: all 0.3s ease;
    }

    .col-right.active .pill-upper {
      background: #bae6fd;
      border-color: #0284c7;
      color: #0369a1;
    }

    /* Explanatory Callout */
    .annotation-box {
      margin-top: 8px;
      font-size: 11.5px;
      line-height: 1.35;
      color: #64748b;
      background: rgba(248, 250, 252, 0.9);
      border-radius: 6px;
      padding: 6px 10px;
      width: 100%;
      border-left: 3px solid #cbd5e1;
      text-align: left;
      transition: border-color 0.3s ease, background 0.3s ease;
    }

    .col-left.active .annotation-box {
      border-left-color: #64748b;
      color: #334155;
      background: #f1f5f9;
    }

    .col-right.active .annotation-box {
      border-left-color: #0284c7;
      color: #0369a1;
      background: #f0f9ff;
    }

    .annotation-box strong {
      display: block;
      color: #1e2945;
      font-size: 11px;
      margin-bottom: 2px;
    }

    /* SVG Animations */
    .compass-needle {
      transform-origin: 50px 50px;
      transition: transform 0.6s ease;
    }

    .highway-glow {
      transition: stroke 0.4s ease, opacity 0.4s ease;
    }

    .region-poly {
      transition: fill 0.5s ease, stroke 0.5s ease, filter 0.5s ease;
    }

    .region-pulse-ring {
      transition: opacity 0.5s ease;
      opacity: 0;
    }

    .col-right.active .region-poly {
      fill: #e0f2fe;
      stroke: #0284c7;
      filter: drop-shadow(0 0 6px rgba(2, 132, 199, 0.4));
    }

    .col-right.active .region-pulse-ring {
      opacity: 1;
      animation: pulseGlow 2.5s infinite ease-in-out;
    }

    @keyframes pulseGlow {
      0%, 100% { opacity: 0.3; stroke-width: 1.5; }
      50% { opacity: 0.8; stroke-width: 3; }
    }

    .pin-group {
      transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    .col-right.active .pin-group {
      transform: translate(62px, 45px) scale(1.08);
    }

    /* Highway dash subtle movement */
    .dash-line {
      stroke-dasharray: 4 4;
      animation: routeFlow 3s linear infinite;
    }

    @keyframes routeFlow {
      from { stroke-dashoffset: 16; }
      to { stroke-dashoffset: 0; }
    }

    /* Responsive adjustments */
    @media (max-width: 480px) {
      .comparison-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .divider-bridge {
        display: none;
      }
      .visual-stage {
        height: 100px;
      }
      .sentence-display {
        font-size: 13px;
      }
      .decision-prompt {
        font-size: 11.5px;
      }
    }
  </style>
</head>
<body>

  <div class="container">
    
    <div class="decision-prompt" id="promptBanner">
      <span class="prompt-tag">Decision Check</span>
      <span>Is it a <strong>general heading</strong> or a <strong>designated proper place</strong>?</span>
    </div>

    
    <div class="comparison-grid">
      
      
      <div class="rule-col col-left active" id="colLeft" onclick="selectRule('left')" tabindex="0" role="button" aria-label="Rule: Direction is lowercase">
        <span class="badge badge-lower">Direction / Heading = Lowercase</span>

        <div class="visual-stage">
          <svg viewBox="0 0 120 110" preserveAspectRatio="xMidYMid meet">
            <defs>
              <linearGradient id="roadGrad" x1="0" y1="1" x2="0" y2="0">
                <stop offset="0%" stop-color="#94a3b8" />
                <stop offset="100%" stop-color="#475569" />
              </linearGradient>
              <filter id="northGlow" x="-20%" y="-20%" width="140%" height="140%">
                <feGaussianBlur stdDeviation="1.5" result="blur" />
                <feComposite in="SourceGraphic" in2="blur" operator="over" />
              </filter>
            </defs>

            
            <path d="M 22 102 L 22 20" stroke="#cbd5e1" stroke-width="12" stroke-linecap="round" />
            <path class="dash-line" d="M 22 98 L 22 24" stroke="#ffffff" stroke-width="1.8" stroke-linecap="round" />
            
            
            <rect x="13" y="52" width="18" height="14" rx="3" fill="#1e3a8a" stroke="#ffffff" stroke-width="0.8" />
            <text x="22" y="62" text-anchor="middle" font-size="7" font-weight="800" fill="#ffffff">I-5</text>
            
            
            <polygon points="22,12 17,23 27,23" fill="#0284c7" />

            
            <g transform="translate(25, 0)">
              
              <circle cx="50" cy="52" r="34" fill="#ffffff" stroke="#94a3b8" stroke-width="1.5" />
              <circle cx="50" cy="52" r="30" fill="#f8fafc" stroke="#e2e8f0" stroke-width="1" />
              
              
              <text x="50" y="30" text-anchor="middle" font-size="10" font-weight="800" fill="#0f172a">N</text>
              <text x="50" y="79" text-anchor="middle" font-size="8" font-weight="700" fill="#94a3b8">S</text>
              <text x="74" y="55" text-anchor="middle" font-size="8" font-weight="700" fill="#94a3b8">E</text>
              <text x="26" y="55" text-anchor="middle" font-size="8" font-weight="700" fill="#94a3b8">W</text>
              
              
              <line x1="50" y1="33" x2="50" y2="70" stroke="#e2e8f0" stroke-width="0.8" stroke-dasharray="2 2" />
              <line x1="30" y1="52" x2="70" y2="52" stroke="#e2e8f0" stroke-width="0.8" stroke-dasharray="2 2" />

              
              <g class="compass-needle" id="compassNeedle">
                
                <polygon points="50,28 54,52 50,48 46,52" fill="#0284c7" filter="url(#northGlow)" />
                
                <polygon points="50,74 54,52 50,48 46,52" fill="#cbd5e1" />
                <circle cx="50" cy="52" r="3" fill="#0f172a" />
                <circle cx="50" cy="52" r="1" fill="#ffffff" />
              </g>
            </g>
          </svg>
        </div>

        <div class="sentence-display">
          <span>Drive</span>
          <span class="pill-lower">north</span>
          <span>on Interstate 5</span>
        </div>

        <div class="annotation-box">
          <strong>Compass Direction</strong>
          Describes movement or relative position → always lowercase
        </div>
      </div>

      
      <div class="divider-bridge" aria-hidden="true">
        <div class="divider-line"></div>
        <div class="vs-node">vs</div>
        <div class="divider-line"></div>
      </div>

      
      <div class="rule-col col-right" id="colRight" onclick="selectRule('right')" tabindex="0" role="button" aria-label="Rule: Named region is capitalized">
        <span class="badge badge-upper">Named Region = Capitalized</span>

        <div class="visual-stage">
          <svg viewBox="0 0 130 110" preserveAspectRatio="xMidYMid meet">
            <defs>
              <linearGradient id="regionGrad" x1="0" y1="0" x2="1" y2="1">
                <stop offset="0%" stop-color="#bae6fd" stop-opacity="0.8" />
                <stop offset="100%" stop-color="#e0f2fe" stop-opacity="0.4" />
              </linearGradient>
            </defs>

            
            <path d="M 10 30 Q 65 24 120 30" stroke="#e2e8f0" stroke-width="0.8" fill="none" />
            <path d="M 10 60 Q 65 54 120 60" stroke="#e2e8f0" stroke-width="0.8" fill="none" />
            <path d="M 10 90 Q 65 84 120 90" stroke="#e2e8f0" stroke-width="0.8" fill="none" />

            
            <path d="M 25 15 L 115 15 L 115 95 L 35 95 Q 20 60 25 15 Z" fill="#f8fafc" stroke="#e2e8f0" stroke-width="1" />
            
            
            <text x="14" y="62" font-size="6.5" font-weight="700" fill="#94a3b8" letter-spacing="0.5" transform="rotate(-90 14 62)">PACIFIC</text>

            
            
            <path class="region-pulse-ring" d="M 28 20 L 85 20 L 85 68 L 36 68 Q 28 45 28 20 Z" fill="none" stroke="#0284c7" stroke-linejoin="round" />
            
            
            <path class="region-poly" id="regionShape" d="M 28 20 L 85 20 L 85 68 L 36 68 Q 28 45 28 20 Z" fill="#f0f9ff" stroke="#38bdf8" stroke-width="1.8" stroke-linejoin="round" />

            
            <polygon points="46,38 41,47 51,47" fill="#93c5fd" opacity="0.6" />
            <polygon points="56,34 50,47 62,47" fill="#60a5fa" opacity="0.6" />

            
            <rect x="36" y="51" width="42" height="12" rx="3" fill="#ffffff" fill-opacity="0.92" stroke="#bae6fd" stroke-width="0.8" />
            <text x="57" y="60" text-anchor="middle" font-size="6" font-weight="800" fill="#0369a1" letter-spacing="0.3">PACIFIC NW</text>

            
            <g class="pin-group" transform="translate(62, 45)">
              <path d="M0,0 C-3,-3 -5,-6 -5,-9 C-5,-12 -2.8,-14.5 0,-14.5 C2.8,-14.5 5,-12 5,-9 C5,-6 3,-3 0,0 Z" fill="#0284c7" />
              <circle cx="0" cy="-9" r="1.8" fill="#ffffff" />
            </g>
          </svg>
        </div>

        <div class="sentence-display">
          <span>Life in the</span>
          <span class="pill-upper">Pacific Northwest</span>
        </div>

        <div class="annotation-box">
          <strong>Recognized Geopolitical Area</strong>
          Official name of a specific cultural / geographic area → capitalize proper words
        </div>
      </div>

    </div>
  </div>

  <script>
    function selectRule(side) {
      const leftCol = document.getElementById('colLeft');
      const rightCol = document.getElementById('colRight');
      const needle = document.getElementById('compassNeedle');

      if (side === 'left') {
        leftCol.classList.add('active');
        rightCol.classList.remove('active');
        
        // Gentle swing animation on needle
        needle.style.transform = 'rotate(-12deg)';
        setTimeout(() => {
          needle.style.transform = 'rotate(4deg)';
          setTimeout(() => {
            needle.style.transform = 'rotate(0deg)';
          }, 300);
        }, 200);
      } else {
        rightCol.classList.add('active');
        leftCol.classList.remove('active');
      }
    }

    // Support keyboard navigation (Enter or Space)
    document.querySelectorAll('.rule-col').forEach(col => {
      col.addEventListener('keydown', (e) => {
        if (e.key === 'Enter' || e.key === ' ') {
          e.preventDefault();
          col.click();
        }
      });
    });
  </script>
</body>
</html>

OGE.9.L.7

Aligned learning resources

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