<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Letter Heading and Salutation</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      width: 100%;
      min-height: 100%;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      background: #f8fafc;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-start;
      padding: 12px;
    }
    .controls {
      display: flex;
      gap: 6px;
      margin-bottom: 12px;
      flex-wrap: wrap;
      justify-content: center;
      width: 100%;
      max-width: 520px;
    }
    .btn {
      appearance: none;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: #475569;
      padding: 6px 12px;
      font-size: 12px;
      font-weight: 600;
      border-radius: 16px;
      cursor: pointer;
      transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    }
    .btn:hover {
      background: #f1f5f9;
      color: #0f172a;
    }
    .btn.active {
      background: #0284c7;
      color: #ffffff;
      border-color: #0284c7;
    }

    /* Paper area - integrated cleanly without heavy card borders or drop shadows */
    .letter-sheet {
      position: relative;
      width: 100%;
      max-width: 520px;
      background-color: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 4px;
      padding: 14px 12px 14px 38px;
      background-image: repeating-linear-gradient(
        to bottom,
        transparent,
        transparent 43px,
        #e2e8f0 43px,
        #e2e8f0 44px
      );
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    /* Left margin line */
    .letter-sheet::before {
      content: "";
      position: absolute;
      top: 0;
      bottom: 0;
      left: 28px;
      width: 2px;
      background-color: #fca5a5;
    }

    .line-row {
      min-height: 44px;
      display: flex;
      align-items: center;
      position: relative;
      z-index: 1;
    }
    .line-right {
      justify-content: flex-end;
    }
    .line-left {
      justify-content: flex-start;
    }

    .pill-wrapper {
      display: inline-flex;
      flex-direction: column;
      position: relative;
    }
    .line-right .pill-wrapper {
      align-items: flex-end;
    }
    .line-left .pill-wrapper {
      align-items: flex-start;
    }

    .tag {
      font-size: 10px;
      font-weight: 700;
      letter-spacing: 0.4px;
      text-transform: uppercase;
      padding: 2px 6px;
      border-radius: 4px;
      margin-bottom: 2px;
      display: inline-block;
      white-space: nowrap;
      transition: opacity 0.2s ease;
    }
    .tag-blue {
      background: #2563eb;
      color: #ffffff;
    }
    .tag-green {
      background: #16a34a;
      color: #ffffff;
    }

    .pill {
      display: inline-flex;
      align-items: center;
      font-size: 15px;
      font-weight: 600;
      padding: 3px 8px;
      border-radius: 8px;
      position: relative;
      transition: opacity 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
    }
    .pill-blue {
      background: #eff6ff;
      border: 1.5px solid #3b82f6;
      color: #1d4ed8;
    }
    .pill-green {
      background: #f0fdf4;
      border: 1.5px solid #22c55e;
      color: #15803d;
    }

    .comma-box {
      display: inline-block;
      position: relative;
      color: #dc2626;
      font-weight: 800;
    }
    .comma-lens {
      position: absolute;
      width: 20px;
      height: 20px;
      border: 2px solid #dc2626;
      border-radius: 50%;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      background: rgba(239, 68, 68, 0.15);
      animation: pulse 2s infinite ease-in-out;
      pointer-events: none;
      box-sizing: border-box;
    }

    @keyframes pulse {
      0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.9; }
      50% { transform: translate(-50%, -50%) scale(1.15); opacity: 1; }
    }

    /* Dedicated Callout Row avoiding text collisions */
    .callout-row {
      display: flex;
      justify-content: flex-end;
      margin-top: 4px;
      position: relative;
      z-index: 1;
    }
    .callout {
      background: #fef2f2;
      border: 1.5px solid #ef4444;
      color: #b91c1c;
      padding: 5px 10px;
      border-radius: 6px;
      font-size: 11px;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 5px;
      transition: opacity 0.2s ease, outline 0.2s ease;
    }

    .dimmed {
      opacity: 0.3;
    }
    .highlight {
      outline: 2px solid #2563eb;
      outline-offset: 1px;
    }

    /* Mobile adjustments */
    @media (max-width: 400px) {
      body {
        padding: 8px;
      }
      .letter-sheet {
        padding: 10px 8px 12px 30px;
        gap: 6px;
      }
      .letter-sheet::before {
        left: 22px;
      }
      .pill {
        font-size: 13.5px;
        padding: 2px 6px;
      }
      .tag {
        font-size: 9.5px;
        padding: 1px 5px;
      }
      .callout {
        font-size: 10.5px;
        padding: 4px 8px;
      }
      .btn {
        padding: 5px 10px;
        font-size: 11px;
      }
    }
  </style>
</head>
<body>

  <div class="controls">
    <button class="btn active" onclick="setMode('all', this)">All Parts</button>
    <button class="btn" onclick="setMode('heading', this)">Heading</button>
    <button class="btn" onclick="setMode('salutation', this)">Salutation</button>
    <button class="btn" onclick="setMode('commas', this)">Commas</button>
  </div>

  <div class="letter-sheet">
    
    <div class="line-row line-right">
      <div class="pill-wrapper" id="headingWrapper">
        <span class="tag tag-blue">Heading (Date)</span>
        <div id="headingPill" class="pill pill-blue">
          October 14<span class="comma-box">,<span id="lens1" class="comma-lens"></span></span> 2025
        </div>
      </div>
    </div>

    
    <div class="line-row line-left">
      <div class="pill-wrapper" id="salutationWrapper">
        <span class="tag tag-green">Salutation (Greeting)</span>
        <div id="salutationPill" class="pill pill-green">
          Dear Maya<span class="comma-box">,<span id="lens2" class="comma-lens"></span></span>
        </div>
      </div>
    </div>

    
    <div class="callout-row">
      <div id="callout" class="callout">
        <span>🔍</span>
        <span>Don't forget the comma!</span>
      </div>
    </div>
  </div>

  <script>
    function setMode(mode, element) {
      document.querySelectorAll('.btn').forEach(btn => btn.classList.remove('active'));
      if (element) {
        element.classList.add('active');
      }

      const headingWrap = document.getElementById('headingWrapper');
      const salutationWrap = document.getElementById('salutationWrapper');
      const lens1 = document.getElementById('lens1');
      const lens2 = document.getElementById('lens2');
      const callout = document.getElementById('callout');

      // Reset
      headingWrap.classList.remove('dimmed', 'highlight');
      salutationWrap.classList.remove('dimmed', 'highlight');
      lens1.style.display = 'block';
      lens2.style.display = 'block';
      lens1.style.animation = 'pulse 2s infinite ease-in-out';
      lens2.style.animation = 'pulse 2s infinite ease-in-out';
      callout.classList.remove('dimmed', 'highlight');
      callout.style.outline = 'none';

      if (mode === 'heading') {
        headingWrap.classList.add('highlight');
        salutationWrap.classList.add('dimmed');
        lens1.style.display = 'block';
        lens2.style.display = 'none';
        callout.classList.add('dimmed');
      } else if (mode === 'salutation') {
        salutationWrap.classList.add('highlight');
        headingWrap.classList.add('dimmed');
        lens1.style.display = 'none';
        lens2.style.display = 'block';
        callout.classList.add('dimmed');
      } else if (mode === 'commas') {
        headingWrap.classList.remove('dimmed', 'highlight');
        salutationWrap.classList.remove('dimmed', 'highlight');
        lens1.style.animation = 'pulse 1.2s infinite ease-in-out';
        lens2.style.animation = 'pulse 1.2s infinite ease-in-out';
        callout.style.outline = '2px solid #ef4444';
      }
    }
  </script>
</body>
</html>

Formatting Friendly Letters and Social Correspondence

<!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: #1e293b;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
    }

    .toolbar {
      display: flex;
      gap: 6px;
      margin-bottom: 12px;
      background: #e2e8f0;
      padding: 4px;
      border-radius: 20px;
    }

    .tab-btn {
      border: none;
      background: transparent;
      padding: 6px 14px;
      border-radius: 16px;
      font-size: 13px;
      font-weight: 600;
      color: #64748b;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .tab-btn.active {
      background: #ffffff;
      color: #0f172a;
      box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    }

    .letter-sheet {
      position: relative;
      width: 100%;
      max-width: 480px;
      height: 280px;
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 8px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
      padding: 18px 24px;
      overflow: hidden;
    }

    /* Subtle ruled lines */
    .ruled-line {
      height: 1px;
      background: #f1f5f9;
      margin-bottom: 22px;
    }

    /* Heading preview */
    .heading-preview {
      position: absolute;
      right: 32px;
      top: 18px;
      font-size: 13px;
      color: #64748b;
      font-weight: 500;
      letter-spacing: 0.2px;
    }

    /* Faded body placeholders */
    .body-lines {
      position: absolute;
      top: 70px;
      left: 24px;
      width: 55%;
      display: flex;
      flex-direction: column;
      gap: 10px;
      opacity: 0.35;
    }
    .ghost-line {
      height: 6px;
      background: #94a3b8;
      border-radius: 3px;
    }

    /* Vertical Guide Line */
    .alignment-guide {
      position: absolute;
      right: 175px;
      top: 14px;
      bottom: 20px;
      width: 2px;
      border-left: 2px dashed #0ea5e9;
      opacity: 0;
      transition: opacity 0.3s ease;
      pointer-events: none;
      z-index: 10;
    }
    .guide-tag {
      position: absolute;
      top: 45%;
      left: 6px;
      background: #0ea5e9;
      color: white;
      font-size: 10px;
      font-weight: 700;
      padding: 2px 6px;
      border-radius: 4px;
      white-space: nowrap;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    /* Target Section: Bottom Right */
    .letter-bottom {
      position: absolute;
      right: 32px;
      bottom: 22px;
      width: 144px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    /* Closing Block */
    .closing-wrap {
      position: relative;
      padding: 4px 6px;
      border-radius: 6px;
      transition: background 0.3s ease;
    }
    .closing-text {
      font-size: 19px;
      font-family: Georgia, serif;
      color: #0f172a;
      white-space: nowrap;
      line-height: 1.2;
    }

    /* Signature Block */
    .signature-wrap {
      position: relative;
      padding: 2px 6px;
      border-radius: 6px;
      transition: background 0.3s ease;
    }
    .signature-text {
      font-family: "Brush Script MT", "Caveat", "Comic Sans MS", cursive;
      font-size: 26px;
      color: #1e3a8a;
      line-height: 1.1;
    }

    /* Labels / Badges */
    .badge {
      display: inline-flex;
      align-items: center;
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.6px;
      padding: 2px 8px;
      border-radius: 4px;
      margin-bottom: 2px;
    }
    .badge-orange {
      background: #ffedd5;
      color: #c2410c;
      border: 1px solid #fdba74;
    }
    .badge-rose {
      background: #ffe4e6;
      color: #be123c;
      border: 1px solid #fda4af;
    }

    /* Callout annotations */
    .annotation-row {
      position: absolute;
      top: -30px;
      left: -10px;
      display: flex;
      gap: 4px;
      white-space: nowrap;
      opacity: 0;
      transform: translateY(4px);
      transition: all 0.3s ease;
      pointer-events: none;
    }

    .pill {
      font-size: 10px;
      font-weight: 700;
      padding: 2px 6px;
      border-radius: 4px;
      background: #f97316;
      color: white;
      box-shadow: 0 2px 4px rgba(249,115,22,0.25);
    }
    .pill.comma {
      background: #ea580c;
    }

    /* State classes */
    .show-guide .alignment-guide {
      opacity: 1;
    }
    .highlight-closing .closing-wrap {
      background: #fff7ed;
      outline: 2px solid #ea580c;
    }
    .highlight-closing .annotation-row {
      opacity: 1;
      transform: translateY(0);
    }
    .highlight-sig .signature-wrap {
      background: #fff1f2;
      outline: 2px solid #e11d48;
    }
  </style>
</head>
<body class="show-guide">

  <div class="toolbar">
    <button class="tab-btn active" onclick="setMode('align', this)">1. Alignment</button>
    <button class="tab-btn" onclick="setMode('closing', this)">2. Closing Rule</button>
    <button class="tab-btn" onclick="setMode('sig', this)">3. Signature</button>
  </div>

  <div class="letter-sheet" id="sheet">
    
    <div class="ruled-line" style="margin-top: 40px;"></div>
    <div class="ruled-line"></div>
    <div class="ruled-line"></div>
    <div class="ruled-line"></div>

    
    <div class="alignment-guide">
      <div class="guide-tag">Vertical Alignment</div>
    </div>

    
    <div class="heading-preview">
      October 14, 2024
    </div>

    
    <div class="body-lines">
      <div class="ghost-line" style="width: 100%;"></div>
      <div class="ghost-line" style="width: 90%;"></div>
      <div class="ghost-line" style="width: 95%;"></div>
      <div class="ghost-line" style="width: 60%;"></div>
    </div>

    
    <div class="letter-bottom">
      
      
      <div class="closing-wrap">
        <div class="annotation-row">
          <span class="pill">Capital Y</span>
          <span class="pill">lower f</span>
          <span class="pill comma">Comma ,</span>
        </div>
        <div class="badge badge-orange">Closing</div>
        <div class="closing-text">Your friend,</div>
      </div>

      
      <div class="signature-wrap">
        <div class="badge badge-rose">Signature</div>
        <div class="signature-text">Leo</div>
      </div>

    </div>
  </div>

  <script>
    function setMode(mode, btn) {
      document.querySelectorAll('.tab-btn').forEach(b => b.classList.remove('active'));
      btn.classList.add('active');

      const body = document.body;
      body.classList.remove('show-guide', 'highlight-closing', 'highlight-sig');

      if (mode === 'align') {
        body.classList.add('show-guide');
      } else if (mode === 'closing') {
        body.classList.add('highlight-closing');
      } else if (mode === 'sig') {
        body.classList.add('highlight-sig');
      }
    }
  </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>5 Parts of a Friendly Letter</title>
  <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: #1e293b;
      padding: 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      min-height: 100%;
    }

    /* Controls */
    .controls {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      justify-content: center;
      margin-bottom: 10px;
      width: 100%;
      max-width: 580px;
    }
    .filter-btn {
      background: #ffffff;
      border: 1.5px solid #cbd5e1;
      color: #475569;
      padding: 4px 10px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 600;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: all 0.2s ease;
      user-select: none;
    }
    .filter-btn:hover {
      border-color: #94a3b8;
    }
    .filter-btn.active {
      background: #1e293b;
      color: #ffffff;
      border-color: #1e293b;
    }
    .filter-btn[data-target="heading"].active { background: #2563eb; border-color: #2563eb; }
    .filter-btn[data-target="salutation"].active { background: #16a34a; border-color: #16a34a; }
    .filter-btn[data-target="body"].active { background: #9333ea; border-color: #9333ea; }
    .filter-btn[data-target="closing"].active { background: #ea580c; border-color: #ea580c; }
    .filter-btn[data-target="signature"].active { background: #e11d48; border-color: #e11d48; }

    /* Lined Paper Container */
    .paper-wrapper {
      width: 100%;
      max-width: 580px;
      position: relative;
    }
    .lined-paper {
      background-color: #ffffff;
      background-image: 
        linear-gradient(90deg, transparent 46px, #fca5a5 46px, #fca5a5 48px, transparent 48px),
        linear-gradient(#e2e8f0 1px, transparent 1px);
      background-size: 100% 100%, 100% 28px;
      border-radius: 8px;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
      border: 1px solid #cbd5e1;
      padding: 20px 18px 24px 58px;
      position: relative;
      line-height: 28px;
      font-size: 15px;
      min-height: 340px;
    }

    /* Letter Parts */
    .letter-part {
      display: inline-block;
      position: relative;
      border-radius: 6px;
      padding: 0 4px;
      transition: all 0.25s ease;
      cursor: pointer;
    }

    .tag {
      font-size: 10px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      padding: 2px 6px;
      border-radius: 4px;
      line-height: 1.2;
      display: inline-flex;
      align-items: center;
      gap: 3px;
      vertical-align: middle;
      margin-left: 6px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.1);
      white-space: nowrap;
    }

    /* Heading (Blue) */
    .heading-row {
      text-align: right;
      margin-bottom: 12px;
    }
    .part-heading {
      background: rgba(37, 99, 235, 0.1);
      color: #1d4ed8;
      font-weight: 600;
    }
    .tag-heading { background: #2563eb; color: #fff; }

    /* Salutation (Green) */
    .salutation-row {
      text-align: left;
      margin-bottom: 8px;
    }
    .part-salutation {
      background: rgba(22, 163, 74, 0.1);
      color: #15803d;
      font-weight: 600;
    }
    .tag-salutation { background: #16a34a; color: #fff; }

    /* Body (Purple) */
    .body-row {
      text-align: left;
      margin-bottom: 18px;
    }
    .part-body {
      background: rgba(147, 51, 234, 0.08);
      color: #6b21a8;
      text-indent: 26px;
      display: block;
      padding: 2px 6px;
      line-height: 28px;
    }
    .tag-body { background: #9333ea; color: #fff; margin-left: 0; margin-bottom: 4px; }

    /* Closing & Signature (Orange & Rose) */
    .closing-block {
      margin-left: auto;
      width: fit-content;
      text-align: left;
      padding-left: 20px;
    }
    .part-closing {
      background: rgba(234, 88, 12, 0.1);
      color: #c2410c;
      font-weight: 600;
    }
    .tag-closing { background: #ea580c; color: #fff; }

    .part-signature {
      background: rgba(225, 29, 72, 0.1);
      color: #be123c;
      font-weight: 700;
      font-style: italic;
      font-size: 17px;
      margin-top: 4px;
    }
    .tag-signature { background: #e11d48; color: #fff; }

    /* Sparkle Comma */
    .comma-glow {
      position: relative;
      display: inline-block;
      font-weight: 900;
      color: #b91c1c;
      padding: 0 1px;
    }
    .comma-glow::after {
      content: "✦";
      position: absolute;
      top: -9px;
      right: -8px;
      font-size: 9px;
      color: #eab308;
      filter: drop-shadow(0 0 2px #ca8a04);
      animation: pulseGlow 1.8s infinite ease-in-out;
    }
    @keyframes pulseGlow {
      0%, 100% { transform: scale(0.85); opacity: 0.7; }
      50% { transform: scale(1.25); opacity: 1; }
    }

    /* Selection Highlight State */
    .dimmed {
      opacity: 0.28;
      filter: grayscale(40%);
    }
    .highlighted {
      box-shadow: 0 0 0 2.5px currentColor;
      opacity: 1 !important;
      filter: none !important;
    }

    /* Small bottom bar */
    .paper-footer {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-top: 8px;
      font-size: 11px;
      color: #64748b;
      width: 100%;
      max-width: 580px;
      padding: 0 4px;
    }
    .comma-legend {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-weight: 600;
      color: #475569;
    }
  </style>
</head>
<body>

  
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          November 12<span class="comma-glow">,</span> 2025
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          Thank you for coming to my soccer game on Saturday! It was so cool that you saw my goal. Are you free to ride bikes this weekend?
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        <div>
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            Your pal<span class="comma-glow">,</span>
            <span class="tag tag-closing">4. Closing</span>
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            Alex
            <span class="tag tag-signature">5. Signature</span>
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    </div>
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      <span class="zone-content">I loved your drawing! Can you visit next weekend?</span>
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OGE.4.W.4

Aligned learning resources

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