ChapterGenerator/index.html at main · synthica-org/ChapterGenerator · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Chapter Leader Certificate</title>

<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Cinzel:wght@500;700&family=Lato:wght@400;700&display=swap" rel="stylesheet">

<style>
  :root {
    --navy: #0a1628; --navy-mid: #112240;
    --gold: #c9a84c; --gold-light: #e8cc7a;
    --white: #ffffff; --text: #e8edf5;
    --muted: #7a8ba8; --border: rgba(201,168,76,0.25);
    --radius: 16px;
  }

  /* Resetting everything to strip layout modifiers entirely */
  * { margin:0; padding:0; box-sizing:border-box; }

  body {
    background: var(--navy) !important;
    color: var(--text) !important;
    font-family: 'Lato', sans-serif !important;
    min-height: 100vh;
    display: flex; flex-direction: column; align-items: center;
    padding: 40px 20px 80px;
  }

  header { text-align:center; margin-bottom:44px; }
  .logo-row { display:flex; align-items:center; justify-content:center; gap:12px; margin-bottom:6px; }

  .logo-icon {
    width:40px; height:40px; border-radius:10px;
    background: linear-gradient(135deg, var(--gold), var(--gold-light));
    display:flex; align-items:center; justify-content:center; font-size:20px;
  }

  h1 {
    font-family:'Cinzel', serif !important;
    font-size: 28px; font-weight:700;
    color: var(--gold-light) !important;
    letter-spacing:0.04em;
  }

  .subtitle { font-size:13px; color:var(--muted); text-transform:uppercase; letter-spacing:0.1em; }

  .card {
    background: var(--navy-mid) !important;
    border:1px solid var(--border);
    border-radius: var(--radius); padding:32px 36px;
    width:100%; max-width:520px; box-shadow: 0 24px 60px rgba(0,0,0,0.4);
  }

  .field-label {
    font-size:11px; font-weight:700; text-transform:uppercase;
    letter-spacing:0.1em; color:var(--muted); margin-bottom:8px;
  }

  input[type=text] {
    width:100%; padding:13px 16px;
    background:rgba(10,22,40,0.7); border:1.5px solid rgba(201,168,76,0.25);
    border-radius:10px; color:var(--white); font-size:16px; outline:none;
    margin-bottom:20px;
  }

  input[type=text]:focus { border-color:var(--gold); }

  .gen-btn {
    width:100%; padding:15px;
    background: linear-gradient(135deg,var(--gold),var(--gold-light));
    color:var(--navy); border:none; border-radius:10px;
    font-family:'Cinzel', serif; font-size:13px; font-weight:700;
    letter-spacing:0.08em; cursor:pointer; opacity:0.4; pointer-events:none;
  }

  .gen-btn.active { opacity:1; pointer-events:all; }

  #preview-section {
    display:none; width:100%; max-width:900px; margin-top:32px;
  }

  .preview-label {
    font-family:'Cinzel', serif; font-size:12px; text-transform:uppercase;
    letter-spacing:0.14em; color:var(--gold); margin-bottom:14px; text-align:center;
  }

  #preview-canvas {
    width:100%; height:auto;
    border-radius:12px;
    box-shadow:0 20px 60px rgba(0,0,0,0.5);
    display:block;
  }

  .dl-btn {
    display:block; width:100%; max-width:340px; margin:18px auto 0; padding:14px;
    background:var(--navy-mid); border:1.5px solid var(--gold);
    color:var(--gold); border-radius:10px; font-family:'Cinzel', serif;
    font-size:12px; font-weight:700; text-align:center; text-decoration:none;
  }
  .dl-btn:hover { background:rgba(201,168,76,0.1); }
</style>
</head>
<body>

<header>
  <div class="logo-row">
    <div class="logo-icon">🏅</div>
    <h1>Chapter Leader Certificate</h1>
  </div>
  <p class="subtitle">Official Synthica Generation System</p>
</header>

<div class="card">
  <div class="field-label">Recipient Name</div>
  <input type="text" id="name-input" placeholder="Type name exactly as it should appear..." autocomplete="off">
  <button class="gen-btn" id="generate-btn">Generate Certificate</button>
</div>

<div id="preview-section">
  <p class="preview-label">Official Live Preview</p>
  <canvas id="preview-canvas"></canvas>
  <a href="#" class="dl-btn" id="download-btn" download="Certificate.png">Download PNG Certificate</a>
</div>

<script>
  const input = document.getElementById('name-input');
  const btn = document.getElementById('generate-btn');

  input.addEventListener('input', () => {
    btn.className = input.value.trim().length > 0 ? 'gen-btn active' : 'gen-btn';
  });

  btn.addEventListener('click', async () => {
    const name = input.value.trim();
    if (!name) return;

    const tmpl = new Image();
    tmpl.crossOrigin = "anonymous";
    // Target the source image asset cleanly
    tmpl.src = 'certificate-template.jpg';

    await new Promise((resolve) => {
      tmpl.onload = resolve;
      tmpl.onerror = () => {
        alert("Error loading certificate-template.jpg. Verify it is sitting directly alongside index.html in your main directory.");
        resolve();
      };
    });

    // FORCE high-priority font parsing before executing pixel array injections
    await document.fonts.load('10px "Cinzel"');
    await document.fonts.ready;

    const canvas = document.getElementById('preview-canvas');
    const ctx = canvas.getContext('2d');

    // Adapt layout context matching your template asset pixel proportions
    const W = tmpl.naturalWidth || 1920;
    const H = tmpl.naturalHeight || 1080;
    canvas.width = W;
    canvas.height = H;

    // Render underlying layout image
    ctx.drawImage(tmpl, 0, 0, W, H);

    // PROPORTIONAL SCALE CALCULATION: Scales font seamlessly relative to base resolution width
    // Modifying the '0.052' scalar allows fine adjustment of font scaling (0.052 * 1920px yields ~100px text size)
    let baseFontSize = Math.floor(W * 0.052);
    ctx.font = `700 ${baseFontSize}px "Cinzel"`;

    // Auto-fit long name entries so text stays safely inside boundaries
    const maxTextWidth = W * 0.75;
    while (ctx.measureText(name).width > maxTextWidth && baseFontSize > 24) {
      baseFontSize -= 4;
      ctx.font = `700 ${baseFontSize}px "Cinzel"`;
    }

    // Precise Native Text Coordinates Center Alignment
    ctx.textAlign = 'center';
    ctx.textBaseline = 'middle';

    // Vertical offset height alignment parameter
    // Adjust 0.52 fraction slightly up or down to center perfectly on the text line of your template
    const targetY = H * 0.345;

    // Render crisp typographic details
    ctx.fillStyle = '#c9a84c'; // Gold color matching design tokens
    ctx.fillText(name, W / 2, targetY);

    // Expose preview blocks to viewport cleanly
    const preview = document.getElementById('preview-section');
    preview.style.display = 'block';
    preview.scrollIntoView({ behavior: 'smooth', block: 'start' });

    // Link download file element output path
    document.getElementById('download-btn').href = canvas.toDataURL('image/png');
  });
</script>
</body>
</html>