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

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e293b;
      background: transparent;
      padding: 12px 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      min-height: 100%;
    }

    /* Interactive filter buttons */
    .controls {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      justify-content: center;
      width: 100%;
      max-width: 580px;
      margin-bottom: 12px;
    }

    .btn-tab {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      border-radius: 20px;
      padding: 4px 10px;
      font-size: 11.5px;
      font-weight: 600;
      color: #475569;
      cursor: pointer;
      transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
      white-space: nowrap;
    }

    .btn-tab:hover {
      background: #e2e8f0;
      color: #0f172a;
    }

    .btn-tab.active {
      background: #0284c7;
      border-color: #0284c7;
      color: #ffffff;
    }

    /* Main Letter Workspace (no outer card shell/shadow) */
    .document-area {
      width: 100%;
      max-width: 580px;
      background: transparent;
      padding: 0 4px;
      font-size: 13px;
      line-height: 1.45;
    }

    /* Top format descriptor bar */
    .format-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 10px;
      padding-bottom: 6px;
      border-bottom: 1px solid #e2e8f0;
    }

    .format-title {
      font-size: 11px;
      font-weight: 700;
      color: #0284c7;
      text-transform: uppercase;
      letter-spacing: 0.6px;
    }

    .format-hint {
      font-size: 11px;
      color: #64748b;
      font-style: italic;
    }

    /* Letter layout with visible margin guide */
    .letter-sheet {
      position: relative;
      border-left: 2px dashed #38bdf8;
      padding-left: 12px;
      margin-left: 4px;
    }

    /* Letter structural blocks */
    .letter-block {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 9px;
      padding: 4px 8px;
      border-radius: 6px;
      border-left: 3px solid transparent;
      transition: background-color 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
      cursor: pointer;
    }

    .letter-block:hover {
      background-color: #f8fafc;
    }

    .letter-block.highlighted {
      background-color: #f0f9ff;
      border-left-color: #0284c7;
    }

    .letter-block.dimmed {
      opacity: 0.4;
    }

    .block-content {
      flex: 1;
      min-width: 0;
    }

    .block-label {
      flex-shrink: 0;
      font-size: 10px;
      font-weight: 700;
      color: #0369a1;
      background: #e0f2fe;
      border: 1px solid #bae6fd;
      padding: 2px 7px;
      border-radius: 12px;
      text-transform: uppercase;
      letter-spacing: 0.3px;
      white-space: nowrap;
      opacity: 0;
      transition: opacity 0.2s ease;
    }

    .letter-block.highlighted .block-label,
    .letter-block:hover .block-label {
      opacity: 1;
    }

    .salutation {
      font-weight: 600;
    }

    .signature-handwritten {
      font-family: "Brush Script MT", "Caveat", "Dancing Script", cursive;
      font-size: 19px;
      color: #1e3a8a;
      line-height: 1.1;
      margin: 2px 0;
      display: block;
    }

    @media (max-width: 480px) {
      body {
        padding: 8px 6px;
      }
      .controls {
        gap: 4px;
        margin-bottom: 8px;
      }
      .btn-tab {
        font-size: 10.5px;
        padding: 3px 8px;
      }
      .document-area {
        font-size: 12px;
        line-height: 1.4;
      }
      .letter-sheet {
        padding-left: 8px;
        margin-left: 2px;
      }
      .letter-block {
        gap: 6px;
        margin-bottom: 7px;
        padding: 3px 6px;
      }
      .block-label {
        font-size: 9px;
        padding: 1px 5px;
      }
      .signature-handwritten {
        font-size: 17px;
      }
    }
  </style>
</head>
<body>

  
  <div class="controls" id="btnGroup">
    <button class="btn-tab active" data-target="all">Show All</button>
    <button class="btn-tab" data-target="heading">Heading</button>
    <button class="btn-tab" data-target="recipient">Inside Address</button>
    <button class="btn-tab" data-target="salutation">Salutation</button>
    <button class="btn-tab" data-target="body">Body</button>
    <button class="btn-tab" data-target="closing">Sign-off</button>
  </div>

  
  <div class="document-area">
    <div class="format-header">
      <span class="format-title">Left-Aligned Block Format</span>
      <span class="format-hint">Dashed line = Margin guide</span>
    </div>

    <div class="letter-sheet">
      
      <div class="letter-block highlighted" data-section="heading">
        <div class="block-content">
          142 Elm Street<br>
          Oak Creek, WI 53154<br>
          October 14, 2024
        </div>
        <span class="block-label">Heading &amp; Date</span>
      </div>

      
      <div class="letter-block highlighted" data-section="recipient">
        <div class="block-content">
          Dr. Angela Rossi<br>
          Director of Youth Programs<br>
          City Science Center<br>
          500 Museum Way
        </div>
        <span class="block-label">Inside Address</span>
      </div>

      
      <div class="letter-block salutation highlighted" data-section="salutation">
        <div class="block-content">
          Dear Dr. Rossi:
        </div>
        <span class="block-label">Salutation</span>
      </div>

      
      <div class="letter-block highlighted" data-section="body">
        <div class="block-content">
          I am writing to inquire about volunteer research assistant positions available for eighth-grade students this summer.
        </div>
        <span class="block-label">Purpose</span>
      </div>

      
      <div class="letter-block highlighted" data-section="body">
        <div class="block-content">
          My background in competitive robotics has prepared me to assist with your interactive laboratory exhibits.
        </div>
        <span class="block-label">Qualifications</span>
      </div>

      
      <div class="letter-block highlighted" data-section="closing">
        <div class="block-content">
          Sincerely,<br>
          <span class="signature-handwritten">Marcus Vance</span>
          Marcus Vance
        </div>
        <span class="block-label">Sign-off</span>
      </div>
    </div>
  </div>

  <script>
    const buttons = document.querySelectorAll('.btn-tab');
    const blocks = document.querySelectorAll('.letter-block');

    function setActiveSection(target) {
      buttons.forEach(btn => {
        btn.classList.toggle('active', btn.dataset.target === target);
      });

      blocks.forEach(block => {
        const matches = (target === 'all' || block.dataset.section === target);
        block.classList.toggle('highlighted', matches);
        block.classList.toggle('dimmed', !matches);
      });
    }

    buttons.forEach(button => {
      button.addEventListener('click', () => {
        setActiveSection(button.dataset.target);
      });
    });

    blocks.forEach(block => {
      block.addEventListener('click', () => {
        setActiveSection(block.dataset.section);
      });
    });
  </script>
</body>
</html>

Formatting Formal and Informal Letters for Specific Audiences

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      background: transparent;
      color: #1e2945;
      padding: 8px;
    }
    
    /* Layout */
    .grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      width: 100%;
      max-width: 640px;
      margin: 0 auto;
    }

    @media (max-width: 480px) {
      .grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }
    }

    /* Cards */
    .letter-card {
      background: #ffffff;
      border-radius: 12px;
      border: 1px solid #e2e8f0;
      padding: 12px;
      box-shadow: 0 2px 6px rgba(0,0,0,0.04);
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 13px;
    }

    .card-title {
      font-weight: 700;
      font-size: 14px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-bottom: 6px;
      border-bottom: 2px solid #f1f5f9;
    }

    .badge-formal {
      background: #e0f2fe;
      color: #0369a1;
      padding: 2px 8px;
      border-radius: 12px;
      font-size: 11px;
      font-weight: 600;
    }

    .badge-informal {
      background: #fef3c7;
      color: #92400e;
      padding: 2px 8px;
      border-radius: 12px;
      font-size: 11px;
      font-weight: 600;
    }

    /* Letter Mockups */
    .section {
      position: relative;
      padding: 4px 6px;
      border-radius: 6px;
      transition: background-color 0.2s ease;
    }

    .callout {
      display: inline-block;
      font-size: 10px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      border-radius: 4px;
      padding: 1px 5px;
      margin-left: 4px;
      vertical-align: middle;
    }

    .formal .callout { background: #0284c7; color: #fff; }
    .informal .callout { background: #d97706; color: #fff; }

    .line-text {
      color: #334155;
      line-height: 1.35;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 12px;
    }

    .highlight-punct {
      font-weight: 900;
      padding: 0 2px;
      border-radius: 3px;
    }

    .formal .highlight-punct {
      background: #bae6fd;
      color: #0369a1;
    }

    .informal .highlight-punct {
      background: #fde68a;
      color: #92400e;
    }

    /* Visual skeletal text lines */
    .skeleton-block {
      display: flex;
      flex-direction: column;
      gap: 4px;
      margin: 4px 0;
    }

    .sk-line {
      height: 6px;
      background: #e2e8f0;
      border-radius: 3px;
    }

    .indent {
      margin-left: 20px;
    }

    .empty-placeholder {
      border: 1px dashed #cbd5e1;
      border-radius: 4px;
      padding: 4px 8px;
      color: #94a3b8;
      font-size: 11px;
      font-style: italic;
      text-align: center;
      background: #f8fafc;
    }
  </style>
</head>
<body>

  <div class="grid">
    
    <div class="letter-card formal">
      <div class="card-title">
        <span>Formal Business</span>
        <span class="badge-formal">Official</span>
      </div>

      <div class="section">
        <div class="line-text">Oct 14, 2024</div>
        <div class="line-text" style="margin-top: 4px;">
          Dr. Robert Vance<br>Apex Hospital
          <span class="callout">Inside Address</span>
        </div>
      </div>

      <div class="section">
        <div class="line-text">
          Dear Dr. Vance<span class="highlight-punct">:</span>
          <span class="callout">Colon (:)</span>
        </div>
      </div>

      <div class="section">
        <div class="skeleton-block">
          <div class="sk-line" style="width: 100%;"></div>
          <div class="sk-line" style="width: 90%;"></div>
          <div class="sk-line" style="width: 95%;"></div>
        </div>
        <span class="callout" style="margin-left:0; margin-top:2px;">Left-Aligned Block</span>
      </div>

      <div class="section">
        <div class="line-text">
          Sincerely<span class="highlight-punct">,</span>
          <span class="callout">Formal Close</span>
        </div>
        <div class="line-text" style="font-weight: 600; margin-top: 2px;">Sarah Jenkins</div>
      </div>
    </div>

    
    <div class="letter-card informal">
      <div class="card-title">
        <span>Informal Friendly</span>
        <span class="badge-informal">Casual</span>
      </div>

      <div class="section">
        <div class="line-text">October 14</div>
        <div class="empty-placeholder" style="margin-top: 4px;">
          No inside address needed
        </div>
      </div>

      <div class="section">
        <div class="line-text">
          Hi Maya<span class="highlight-punct">,</span>
          <span class="callout">Comma (,)</span>
        </div>
      </div>

      <div class="section">
        <div class="skeleton-block">
          <div class="sk-line indent" style="width: calc(100% - 20px);"></div>
          <div class="sk-line" style="width: 92%;"></div>
          <div class="sk-line" style="width: 75%;"></div>
        </div>
        <span class="callout" style="margin-left:0; margin-top:2px;">Indented Tone</span>
      </div>

      <div class="section">
        <div class="line-text">
          Warmly<span class="highlight-punct">,</span>
          <span class="callout">Warm Close</span>
        </div>
        <div class="line-text" style="font-weight: 600; margin-top: 2px;">Sarah</div>
      </div>
    </div>
  </div>

</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="1:1">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: #f8fafc;
      padding: 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
    }

    .toolbar {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 4px;
      margin-bottom: 8px;
      width: 100%;
      max-width: 440px;
    }

    .tab-btn {
      appearance: none;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: #1e2945;
      font-size: 11px;
      font-weight: 600;
      padding: 4px 8px;
      border-radius: 14px;
      cursor: pointer;
      transition: all 0.2s ease;
      white-space: nowrap;
    }
    .tab-btn:hover {
      background: #f1f5f9;
    }
    .tab-btn.active {
      background: #1e2945;
      color: #ffffff;
      border-color: #1e2945;
    }

    .sheet-wrapper {
      position: relative;
      width: 100%;
      max-width: 380px;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 6px;
      box-shadow: 0 4px 12px rgba(30, 41, 69, 0.06);
      padding: 14px 14px 12px 14px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .zone {
      position: relative;
      border-radius: 4px;
      padding: 4px 6px;
      border: 2px solid transparent;
      background: #f8fafc;
      transition: all 0.25s ease;
      cursor: pointer;
    }

    .zone-tag {
      display: inline-flex;
      align-items: center;
      font-size: 10px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.3px;
      margin-bottom: 3px;
      line-height: 1;
    }

    /* Dummy text lines */
    .line {
      height: 4px;
      background: #cbd5e1;
      border-radius: 2px;
      margin-bottom: 3px;
    }
    .line:last-child {
      margin-bottom: 0;
    }
    .w-30 { width: 30%; }
    .w-40 { width: 40%; }
    .w-50 { width: 50%; }
    .w-60 { width: 60%; }
    .w-70 { width: 70%; }
    .w-80 { width: 80%; }
    .w-90 { width: 90%; }
    .w-100 { width: 100%; }

    /* Zone Color Definitions */
    .z-sender {
      border-color: #3b82f6;
      background: #eff6ff;
    }
    .z-sender .zone-tag { color: #1d4ed8; }

    .z-date {
      border-color: #22c55e;
      background: #f0fdf4;
      width: 45%;
    }
    .z-date .zone-tag { color: #15803d; }

    .z-recipient {
      border-color: #a855f7;
      background: #faf5ff;
      width: 65%;
    }
    .z-recipient .zone-tag { color: #7e22ce; }

    .z-salutation {
      border-color: #f97316;
      background: #fff7ed;
    }
    .z-salutation .zone-tag { color: #c2410c; }
    .salutation-sample {
      font-family: Georgia, serif;
      font-size: 11px;
      font-weight: 600;
      color: #9a3412;
      display: inline-block;
      margin-top: 1px;
    }
    .colon-badge {
      background: #ea580c;
      color: #ffffff;
      padding: 0 4px;
      border-radius: 3px;
      font-size: 11px;
      font-weight: 700;
    }

    .z-body {
      border-color: #14b8a6;
      background: #f0fdfa;
    }
    .z-body .zone-tag { color: #0f766e; }
    .paragraph {
      margin-bottom: 5px;
    }
    .paragraph:last-child {
      margin-bottom: 0;
    }

    .z-close {
      border-color: #ec4899;
      background: #fdf2f8;
      width: 60%;
    }
    .z-close .zone-tag { color: #be185d; }
    .sig-mark {
      font-family: "Brush Script MT", "Caveat", cursive, sans-serif;
      font-size: 14px;
      color: #9d174d;
      line-height: 1.1;
      margin: 2px 0;
    }

    /* Focus Mode States */
    .sheet-wrapper.focused .zone {
      opacity: 0.25;
      transform: scale(0.99);
    }
    .sheet-wrapper.focused .zone.active-zone {
      opacity: 1;
      transform: scale(1.02);
      box-shadow: 0 0 0 2px #ffffff, 0 4px 10px rgba(0,0,0,0.1);
    }
  </style>
</head>
<body>

  <div class="toolbar" id="toolbar">
    <button class="tab-btn active" data-target="all">All Zones</button>
    <button class="tab-btn" data-target="1">1. Sender</button>
    <button class="tab-btn" data-target="2">2. Date</button>
    <button class="tab-btn" data-target="3">3. Recipient</button>
    <button class="tab-btn" data-target="4">4. Salutation:</button>
    <button class="tab-btn" data-target="5">5. Body</button>
    <button class="tab-btn" data-target="6">6. Close</button>
  </div>

  <div class="sheet-wrapper" id="sheet">
    
    
    <div class="zone z-sender" data-zone="1">
      <div class="zone-tag">1. Sender Address</div>
      <div class="line w-40"></div>
      <div class="line w-50"></div>
    </div>

    
    <div class="zone z-date" data-zone="2">
      <div class="zone-tag">2. Date</div>
      <div class="line w-70"></div>
    </div>

    
    <div class="zone z-recipient" data-zone="3">
      <div class="zone-tag">3. Inside Address (Recipient)</div>
      <div class="line w-50"></div>
      <div class="line w-70"></div>
      <div class="line w-60"></div>
    </div>

    
    <div class="zone z-salutation" data-zone="4">
      <div class="zone-tag">4. Formal Salutation</div>
      <div>
        <span class="salutation-sample">Dear Ms. Carter<span class="colon-badge">:</span></span>
      </div>
    </div>

    
    <div class="zone z-body" data-zone="5">
      <div class="zone-tag">5. Body Paragraphs (Double-spaced between)</div>
      <div class="paragraph">
        <div class="line w-100"></div>
        <div class="line w-90"></div>
        <div class="line w-70"></div>
      </div>
      <div class="paragraph">
        <div class="line w-100"></div>
        <div class="line w-80"></div>
      </div>
    </div>

    
    <div class="zone z-close" data-zone="6">
      <div class="zone-tag">6. Close & Signature</div>
      <div class="line w-40" style="margin-bottom:2px;"></div>
      <div class="sig-mark">J. Smith</div>
      <div class="line w-50"></div>
    </div>

  </div>

  <script>
    const buttons = document.querySelectorAll('.tab-btn');
    const zones = document.querySelectorAll('.zone');
    const sheet = document.getElementById('sheet');

    function setActive(target) {
      buttons.forEach(btn => {
        btn.classList.toggle('active', btn.dataset.target === target);
      });

      if (target === 'all') {
        sheet.classList.remove('focused');
        zones.forEach(z => z.classList.remove('active-zone'));
      } else {
        sheet.classList.add('focused');
        zones.forEach(z => {
          z.classList.toggle('active-zone', z.dataset.zone === target);
        });
      }
    }

    buttons.forEach(btn => {
      btn.addEventListener('click', () => setActive(btn.dataset.target));
    });

    zones.forEach(zone => {
      zone.addEventListener('click', () => {
        const zoneNum = zone.dataset.zone;
        const currentActive = document.querySelector('.tab-btn.active').dataset.target;
        setActive(currentActive === zoneNum ? 'all' : zoneNum);
      });
    });
  </script>
</body>
</html>

OGE.8.W.4

Aligned learning resources

Related diagrams