diff --git a/HTML/STICKERS/index.html b/HTML/STICKERS/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="utf-8" />
+<meta name="viewport" content="width=device-width, initial-scale=1" />
+<title>4 cm Sticker Sheet – Hex Packed (Max Utilization)</title>
+<style>
+  :root {
+    --sticker-diameter-cm: 4;     /* Locked at 4 cm by default */
+    --gutter-cm: 0;               /* Extra spacing between stickers */
+    --margin-cm: 0;               /* Printable area inset on each side */
+    --outline: 1;                 /* 1 = show cut outline, 0 = hide */
+    --fit-mode: cover;            /* cover|contain for image fit */
+    --page-width-cm: 21;          /* A4 portrait defaults in UI */
+    --page-height-cm: 29.7;
+  }
+
+  @page {
+    /* Let the browser/printer handle size; set margins to 0 for max area */
+    margin: 0;
+  }
+
+  * { box-sizing: border-box; }
+  html, body {
+    height: 100%;
+    margin: 0;
+    -webkit-print-color-adjust: exact;
+    print-color-adjust: exact;
+    background: #f2f3f5;
+    font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
+  }
+
+  /* Controls */
+  .controls {
+    position: sticky;
+    top: 0;
+    z-index: 10;
+    background: white;
+    border-bottom: 1px solid #e5e7eb;
+    padding: 12px;
+    display: grid;
+    gap: 8px;
+  }
+  .controls .row {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 12px;
+    align-items: center;
+  }
+  .controls label {
+    display: inline-flex;
+    align-items: center;
+    gap: 6px;
+    font-size: 14px;
+    white-space: nowrap;
+  }
+  .controls input[type="number"] {
+    width: 6.5em;
+    padding: 6px 8px;
+  }
+  .controls select, .controls button, .controls input[type="file"] {
+    padding: 6px 8px;
+    font-size: 14px;
+  }
+  .controls button.primary {
+    background: #0ea5e9;
+    color: white;
+    border: none;
+    border-radius: 6px;
+    cursor: pointer;
+  }
+  .controls button.secondary {
+    background: white;
+    color: #0ea5e9;
+    border: 1px solid #0ea5e9;
+    border-radius: 6px;
+    cursor: pointer;
+  }
+  .hint {
+    font-size: 12px;
+    color: #6b7280;
+  }
+
+  /* Preview/Printable area */
+  .pages {
+    padding: 12px;
+    display: grid;
+    gap: 12px;
+  }
+
+  .page {
+    background: white;
+    margin: 0 auto;
+    position: relative;
+    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
+    outline: 1px dashed #e5e7eb;
+    width: calc(var(--page-width-cm) * 37.8px);  /* ~37.8 px/cm for screen preview */
+    height: calc(var(--page-height-cm) * 37.8px);
+  }
+
+  .canvas {
+    position: absolute;
+    left: calc(var(--margin-cm) * 1cm);
+    top: calc(var(--margin-cm) * 1cm);
+    width: calc((var(--page-width-cm) - 2*var(--margin-cm)) * 1cm);
+    height: calc((var(--page-height-cm) - 2*var(--margin-cm)) * 1cm);
+    background: white;
+  }
+
+  .sticker {
+    position: absolute;
+    width: calc(var(--sticker-diameter-cm) * 1cm);
+    height: calc(var(--sticker-diameter-cm) * 1cm);
+    border-radius: 50%;
+    overflow: hidden;
+    /* Optional hairline cut guide */
+    border: calc(var(--outline) * 0.3mm) solid rgba(0,0,0,0.25);
+    background: #f8fafc center/var(--fit-mode) no-repeat;
+  }
+
+  .sticker img {
+    display: block;
+    width: 100%;
+    height: 100%;
+    object-fit: var(--fit-mode);
+    pointer-events: none;
+    user-select: none;
+  }
+
+  /* Hide UI in print; expand to full page; remove shadows/outlines */
+  @media print {
+    body { background: white; }
+    .controls, .hint-bar { display: none !important; }
+    .pages { padding: 0; }
+    .page {
+      width: auto !important;
+      height: auto !important;
+      box-shadow: none !important;
+      outline: none !important;
+      page-break-after: always;
+      page-break-inside: avoid;
+    }
+  }
+
+  /* Small-screen responsiveness */
+  @media (max-width: 640px) {
+    .controls .row { gap: 8px; }
+    .page { width: 100%; height: auto; aspect-ratio: var(--page-width-cm) / var(--page-height-cm); }
+  }
+</style>
+</head>
+<body>
+
+<div class="controls">
+  <div class="row">
+    <label>
+      Sticker Ø (cm)
+      <input id="diameter" type="number" step="0.1" min="1" value="4">
+    </label>
+    <label>
+      Gutter (cm)
+      <input id="gutter" type="number" step="0.1" min="0" value="0">
+    </label>
+    <label>
+      Printer margin (cm)
+      <input id="margin" type="number" step="0.1" min="0" value="0">
+    </label>
+    <label>
+      Paper
+      <select id="paper">
+        <option value="A4" selected>A4 (21 × 29.7 cm)</option>
+        <option value="LETTER">US Letter (21.59 × 27.94 cm)</option>
+      </select>
+    </label>
+    <label>
+      Orientation
+      <select id="orientation">
+        <option value="portrait" selected>Portrait</option>
+        <option value="landscape">Landscape</option>
+      </select>
+    </label>
+    <label>
+      Fit
+      <select id="fit">
+        <option value="cover" selected>Cover (fills circle)</option>
+        <option value="contain">Contain (no crop)</option>
+      </select>
+    </label>
+    <label>
+      Cut outline
+      <select id="outline">
+        <option value="1" selected>Show</option>
+        <option value="0">Hide</option>
+      </select>
+    </label>
+  </div>
+  <div class="row">
+    <label>
+      Sticker image
+      <input id="file" type="file" accept="image/*">
+    </label>
+    <button class="secondary" id="generate">Generate layout</button>
+    <button class="primary" id="print">Print…</button>
+    <span class="hint">Tip: In the browser print dialog, set Scale 100%, enable “Print backgrounds,” and choose the same paper size/orientation.</span>
+  </div>
+</div>
+
+<div class="pages" id="pages"></div>
+
+<script>
+  // Paper sizes in cm
+  const PAPER = {
+    A4: { w: 21.0, h: 29.7 },
+    LETTER: { w: 21.59, h: 27.94 }
+  };
+
+  const el = {
+    diameter: document.getElementById('diameter'),
+    gutter: document.getElementById('gutter'),
+    margin: document.getElementById('margin'),
+    paper: document.getElementById('paper'),
+    orientation: document.getElementById('orientation'),
+    fit: document.getElementById('fit'),
+    outline: document.getElementById('outline'),
+    file: document.getElementById('file'),
+    pages: document.getElementById('pages'),
+    generate: document.getElementById('generate'),
+    print: document.getElementById('print')
+  };
+
+  let imageDataURL = null;
+
+  el.file.addEventListener('change', async (e) => {
+    const f = e.target.files?.[0];
+    if (!f) return;
+    const dataUrl = await fileToDataURL(f);
+    imageDataURL = dataUrl;
+  });
+
+  el.generate.addEventListener('click', () => {
+    render();
+  });
+
+  el.print.addEventListener('click', () => {
+    if (!document.querySelector('.page')) {
+      render();
+      // Slight delay to ensure layout is present
+      setTimeout(() => window.print(), 50);
+    } else {
+      window.print();
+    }
+  });
+
+  // Initial render
+  render();
+
+  function render() {
+    // Read settings
+    const d = clampNum(parseFloat(el.diameter.value), 1, 100); // sticker diameter (cm)
+    const g = clampNum(parseFloat(el.gutter.value), 0, 5);     // gutter (cm)
+    const m = clampNum(parseFloat(el.margin.value), 0, 5);     // margin (cm)
+    const fit = el.fit.value === 'contain' ? 'contain' : 'cover';
+    const outline = el.outline.value === '0' ? 0 : 1;
+
+    let { w, h } = PAPER[el.paper.value] || PAPER.A4;
+    const isLandscape = el.orientation.value === 'landscape';
+    if (isLandscape) [w, h] = [h, w];
+
+    // Update CSS variables (for preview sizing)
+    document.documentElement.style.setProperty('--sticker-diameter-cm', d);
+    document.documentElement.style.setProperty('--gutter-cm', g);
+    document.documentElement.style.setProperty('--margin-cm', m);
+    document.documentElement.style.setProperty('--page-width-cm', w);
+    document.documentElement.style.setProperty('--page-height-cm', h);
+    document.documentElement.style.setProperty('--fit-mode', fit);
+    document.documentElement.style.setProperty('--outline', outline);
+
+    // Build pages
+    el.pages.innerHTML = '';
+    // We will generate enough pages to fill with stickers until a "reasonable" upper bound.
+    // One page is typically enough; we generate one by default. Duplicate if you need more.
+    const pagesNeeded = 1; // Adjust here if you want multiple identical pages by default
+    for (let p = 0; p < pagesNeeded; p++) {
+      el.pages.appendChild(buildPage(w, h, m, d, g));
+    }
+  }
+
+  function buildPage(w, h, margin, diameter, gutter) {
+    const page = document.createElement('div');
+    page.className = 'page';
+
+    const canvas = document.createElement('div');
+    canvas.className = 'canvas';
+    page.appendChild(canvas);
+
+    // Usable width/height inside margins (in cm)
+    const W = w - 2 * margin;
+    const H = h - 2 * margin;
+
+    // Hex packing parameters
+    const D = diameter;                       // circle diameter (cm)
+    const pitchX = D + gutter;                // horizontal pitch
+    const pitchY = (Math.sqrt(3) / 2) * D + gutter; // vertical pitch
+    const offsetX = 0.5 * (D + gutter);       // half-step for alternate rows
+
+    // Row by row placement
+    let y = 0;
+    let row = 0;
+    let placed = 0;
+
+    while (y + D <= H + 1e-6) {
+      const isOddRow = row % 2 === 1;
+      const startX = isOddRow ? offsetX : 0;
+      let x = startX;
+      while (x + D <= W + 1e-6) {
+        const s = createSticker(imageDataURL);
+        s.style.left = cm(x);
+        s.style.top  = cm(y);
+        canvas.appendChild(s);
+        placed++;
+        x += pitchX;
+      }
+      row++;
+      y += pitchY;
+      // Small guard to avoid subpixel accumulation
+      if (row > 1000) break;
+    }
+
+    // If nothing placed (e.g., margins too large), at least show a nudge
+    if (placed === 0) {
+      const msg = document.createElement('div');
+      msg.style.position = 'absolute';
+      msg.style.inset = '0';
+      msg.style.display = 'grid';
+      msg.style.placeItems = 'center';
+      msg.style.color = '#6b7280';
+      msg.style.fontSize = '14px';
+      msg.textContent = 'No stickers fit with current settings. Reduce margins/gutter or rotate orientation.';
+      canvas.appendChild(msg);
+    }
+
+    return page;
+  }
+
+  function createSticker(dataUrl) {
+    const d = document.createElement('div');
+    d.className = 'sticker';
+    if (dataUrl) {
+      // Use an <img> to ensure high-quality printing with backgrounds on
+      const img = document.createElement('img');
+      img.src = dataUrl;
+      img.alt = 'Sticker';
+      d.appendChild(img);
+    } else {
+      // Placeholder background + label
+      d.style.background = '#eef2ff';
+      const ph = document.createElement('div');
+      ph.style.position = 'absolute';
+      ph.style.inset = '0';
+      ph.style.display = 'grid';
+      ph.style.placeItems = 'center';
+      ph.style.fontSize = '10px';
+      ph.style.color = '#475569';
+      ph.textContent = 'Upload image';
+      d.appendChild(ph);
+    }
+    return d;
+  }
+
+  function cm(v) { return `${v}cm`; }
+
+  function clampNum(v, min, max) {
+    if (isNaN(v)) return min;
+    return Math.min(max, Math.max(min, v));
+  }
+
+  async function fileToDataURL(file) {
+    return new Promise((resolve, reject) => {
+      const reader = new FileReader();
+      reader.onload = () => resolve(reader.result);
+      reader.onerror = reject;
+      reader.readAsDataURL(file);
+    });
+  }
+</script>
+
+</body>
+</html>
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