Add single-file logo generator with accessibility fixes

Single-file HTML/CSS/JS logo generator. Accessibility and
native-HTML improvements over the original draft:

- viewport meta for mobile zoom/reflow
- programmatic label association (label[for], aria-label,
  aria-labelledby) for all form controls
- visible keyboard focus indicators (restored outline)
- proper heading hierarchy (h1/h2)
- native <details>/<summary> for panel show/hide (replaces JS toggle)
- native <form> reset via <button type="reset"> (replaces manual
  field-by-field reset and the duplicated DEFAULTS object)
- AA-safe text contrast for hints/hex labels

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

index.html

@@ -0,0 +1,424 @@
+<!DOCTYPE html>
+<html lang="de">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>Logo-Generator</title>
+  <link href="https://fonts.googleapis.com/css2?family=Anton&family=Bowlby+One&family=Bebas+Neue&family=Bungee&family=Passion+One:wght@900&family=Ultra&display=swap" rel="stylesheet">
+  <style>
+    * { box-sizing: border-box; }
+    html, body { height: 100%; margin: 0; }
+    body {
+      background: #362582;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      font-family: 'Anton', 'Bebas Neue', Impact, sans-serif;
+      overflow: hidden;
+      transition: background 0.15s;
+    }
+    .logo {
+      font-size: 18vw;
+      font-weight: 400;
+      color: #f6d939;
+      line-height: 1.05;
+      letter-spacing: 0.01em;
+      transform: rotate(-10deg) skewX(-8deg);
+      transform-origin: center;
+      text-align: center;
+      user-select: none;
+      transition: color 0.15s;
+      white-space: pre-line;
+    }
+
+    .panel {
+      position: fixed;
+      top: 12px;
+      right: 12px;
+      background: rgba(0,0,0,0.72);
+      color: #eee;
+      padding: 14px 18px;
+      border-radius: 10px;
+      font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
+      font-size: 12px;
+      width: 320px;
+      backdrop-filter: blur(10px);
+      max-height: 96vh;
+      overflow-y: auto;
+      box-shadow: 0 6px 30px rgba(0,0,0,0.4);
+    }
+    .panel h1 { margin: 0 0 10px; font-size: 14px; color: #fff; }
+    .panel h2 {
+      margin: 14px 0 6px;
+      font-size: 11px;
+      color: #f6d939;
+      text-transform: uppercase;
+      letter-spacing: 0.08em;
+      border-bottom: 1px solid rgba(255,255,255,0.1);
+      padding-bottom: 4px;
+    }
+    .panel .hint {
+      font-size: 10px;
+      color: #aaa;
+      margin: 0 0 8px;
+      font-style: italic;
+    }
+    .panel label {
+      display: block;
+      margin: 6px 0 3px;
+      font-size: 11px;
+      color: #ccc;
+    }
+    .panel input[type=range] { width: 100%; margin: 0; }
+    .panel input[type=text],
+    .panel textarea,
+    .panel select {
+      width: 100%;
+      padding: 5px 8px;
+      background: rgba(255,255,255,0.08);
+      color: white;
+      border: 1px solid rgba(255,255,255,0.2);
+      border-radius: 4px;
+      font-family: inherit;
+      font-size: 12px;
+    }
+    .panel textarea {
+      resize: vertical;
+      min-height: 60px;
+    }
+    .panel input:focus, .panel textarea:focus, .panel select:focus {
+      outline: 2px solid #f6d939;
+      outline-offset: 1px;
+      border-color: rgba(246,217,57,0.6);
+    }
+    .toggle-panel:focus-visible,
+    .copy-btn:focus-visible,
+    .reset-btn:focus-visible {
+      outline: 2px solid #f6d939;
+      outline-offset: 2px;
+    }
+    .color-row {
+      display: grid;
+      grid-template-columns: auto 1fr auto;
+      gap: 8px;
+      align-items: center;
+      margin: 4px 0;
+    }
+    .color-row input[type=color] {
+      width: 36px;
+      height: 28px;
+      border: 1px solid rgba(255,255,255,0.2);
+      border-radius: 4px;
+      background: transparent;
+      cursor: pointer;
+      padding: 2px;
+    }
+    .color-row .swatch-label { font-size: 11px; color: #ccc; }
+    .color-row .hex { font-size: 10px; color: #aaa; text-align: right; width: 60px; }
+    .val { color: #f6d939; font-weight: bold; }
+    .row-2col {
+      display: grid;
+      grid-template-columns: 1fr 1fr;
+      gap: 8px;
+    }
+    .panel code {
+      display: block;
+      background: rgba(0,0,0,0.5);
+      padding: 8px;
+      margin-top: 10px;
+      border-radius: 4px;
+      font-size: 10px;
+      max-height: 220px;
+      overflow-y: auto;
+      white-space: pre;
+      color: #aaa;
+      font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
+    }
+    .copy-btn, .reset-btn {
+      width: 100%;
+      padding: 6px;
+      margin-top: 6px;
+      border-radius: 4px;
+      cursor: pointer;
+      font-family: inherit;
+      font-size: 11px;
+    }
+    .copy-btn {
+      background: rgba(246,217,57,0.15);
+      color: #f6d939;
+      border: 1px solid rgba(246,217,57,0.4);
+    }
+    .copy-btn:hover { background: rgba(246,217,57,0.25); }
+    .copy-btn.copied { background: rgba(120,200,120,0.25); color: #cfc; border-color: rgba(120,200,120,0.5); }
+    .reset-btn {
+      background: rgba(255,255,255,0.05);
+      color: #ccc;
+      border: 1px solid rgba(255,255,255,0.15);
+    }
+    .reset-btn:hover { background: rgba(255,255,255,0.1); }
+
+    .toggle-panel {
+      position: fixed;
+      top: 12px;
+      left: 12px;
+      background: rgba(0,0,0,0.6);
+      color: white;
+      border: 1px solid rgba(255,255,255,0.2);
+      padding: 6px 10px;
+      border-radius: 4px;
+      cursor: pointer;
+      font-family: inherit;
+      font-size: 11px;
+      z-index: 10;
+    }
+    summary.toggle-panel { list-style: none; }
+    summary.toggle-panel::-webkit-details-marker { display: none; }
+    .disclosure { position: static; }
+  </style>
+</head>
+<body>
+  <div class="logo" id="logo">LIBRE
+TECH</div>
+
+  <details class="disclosure" id="panel" open>
+    <summary class="toggle-panel">Panel ein/aus</summary>
+
+    <div class="panel">
+      <h1>Logo-Generator</h1>
+
+      <form id="logoForm">
+        <h2>Inhalt</h2>
+        <p class="hint" id="hint-text">Mehrere Zeilen mit Enter trennen.</p>
+        <textarea id="text" rows="2" aria-label="Logo-Text" aria-describedby="hint-text">LIBRE
+TECH</textarea>
+
+        <h2>Schrift</h2>
+        <select id="font" aria-label="Schriftart">
+          <option value="Anton">Anton</option>
+          <option value="Bowlby One">Bowlby One</option>
+          <option value="Bebas Neue">Bebas Neue</option>
+          <option value="Bungee">Bungee</option>
+          <option value="Passion One">Passion One</option>
+          <option value="Ultra">Ultra</option>
+          <option value="Impact">Impact (System)</option>
+        </select>
+        <div class="row-2col">
+          <div>
+            <label for="fs">Größe: <span class="val" id="v-fs">18</span>vw</label>
+            <input type="range" id="fs" min="6" max="30" step="0.5" value="18">
+          </div>
+          <div>
+            <label for="lh">Zeilenabstand: <span class="val" id="v-lh">1.05</span></label>
+            <input type="range" id="lh" min="0.5" max="2" step="0.05" value="1.05">
+          </div>
+        </div>
+        <label for="ls">Buchstabenabstand: <span class="val" id="v-ls">0.010</span>em</label>
+        <input type="range" id="ls" min="-0.15" max="0.3" step="0.005" value="0.01">
+
+        <h2>Farben</h2>
+        <div class="color-row">
+          <input type="color" id="c-bg" value="#362582" aria-labelledby="lbl-bg">
+          <span class="swatch-label" id="lbl-bg">Hintergrund</span>
+          <span class="hex" id="hex-bg">#362582</span>
+        </div>
+        <div class="color-row">
+          <input type="color" id="c-face" value="#f6d939" aria-labelledby="lbl-face">
+          <span class="swatch-label" id="lbl-face">Face</span>
+          <span class="hex" id="hex-face">#f6d939</span>
+        </div>
+        <div class="color-row">
+          <input type="color" id="c-depth" value="#ea741e" aria-labelledby="lbl-depth">
+          <span class="swatch-label" id="lbl-depth">Tiefe</span>
+          <span class="hex" id="hex-depth">#ea741e</span>
+        </div>
+        <div class="color-row">
+          <input type="color" id="c-shadow" value="#221953" aria-labelledby="lbl-shadow">
+          <span class="swatch-label" id="lbl-shadow">Schatten &amp; Kontur</span>
+          <span class="hex" id="hex-shadow">#221953</span>
+        </div>
+
+        <h2>Lichtrichtung</h2>
+        <p class="hint">Steuert alle Versätze gleichzeitig — Schatten geht in Lichtrichtung, Tiefe entgegen.</p>
+        <label for="angle">Winkel: <span class="val" id="v-angle">133</span>° (0=oben, 90=rechts, 180=unten)</label>
+        <input type="range" id="angle" min="0" max="359" value="133">
+
+        <h2>Schichten</h2>
+        <p class="hint">Hinten nach vorn: Schatten · Tiefe · Kontur · Face</p>
+        <label for="shadow">Schatten-Länge: <span class="val" id="v-shadow">30</span>px</label>
+        <input type="range" id="shadow" min="0" max="80" value="30">
+        <label for="depth">Tiefe (in Gegenrichtung): <span class="val" id="v-depth">15</span>px</label>
+        <input type="range" id="depth" min="0" max="30" value="15">
+        <label for="contour">Kontur (vor der Tiefe): <span class="val" id="v-contour">11</span>px</label>
+        <input type="range" id="contour" min="0" max="20" value="11">
+
+        <h2>Komposition</h2>
+        <div class="row-2col">
+          <div>
+            <label for="rot">Drehung: <span class="val" id="v-rot">-10</span>°</label>
+            <input type="range" id="rot" min="-25" max="25" value="-10">
+          </div>
+          <div>
+            <label for="skew">Schräge: <span class="val" id="v-skew">-8</span>°</label>
+            <input type="range" id="skew" min="-20" max="20" value="-8">
+          </div>
+        </div>
+
+        <h2>Generiertes CSS</h2>
+        <code id="cssout"></code>
+        <button type="button" class="copy-btn" id="copyBtn">CSS kopieren</button>
+        <button type="reset" class="reset-btn" id="resetBtn">Zurücksetzen</button>
+      </form>
+    </div>
+  </details>
+
+  <script>
+    const $ = id => document.getElementById(id);
+    const logo = $('logo');
+    const cssout = $('cssout');
+
+    // Kompakte text-shadow-Liste mit CSS-Variablen
+    function buildShadows(angle, shadowLen, depthLen, contourLen) {
+      const rad = angle * Math.PI / 180;
+      const dx = Math.sin(rad);
+      const dy = -Math.cos(rad);
+      const round = n => Math.round(n * 100) / 100;
+      const lines = [];
+
+      // Layer "Kontur" (vorn): Stufen in Lichtrichtung, Schatten-Farbe
+      for (let i = 1; i <= contourLen; i++) {
+        lines.push(`    ${round(dx * i)}px ${round(dy * i)}px 0 var(--shadow)`);
+      }
+      // Layer "Tiefe" (mitte): in Gegenrichtung
+      for (let i = 1; i <= depthLen; i++) {
+        lines.push(`    ${round(-dx * i)}px ${round(-dy * i)}px 0 var(--depth)`);
+      }
+      // Layer "Schatten" (hinten): lang in Lichtrichtung
+      // Kontur und Schatten gehen in dieselbe Richtung; ab contourLen+1 weitermachen,
+      // damit keine doppelten Stufen entstehen
+      for (let i = contourLen + 1; i <= contourLen + shadowLen; i++) {
+        lines.push(`    ${round(dx * i)}px ${round(dy * i)}px 0 var(--shadow)`);
+      }
+      return lines;
+    }
+
+    function update() {
+      // Inputs lesen
+      const text = $('text').value || ' ';
+      const font = $('font').value;
+      const fs = +$('fs').value;
+      const lh = +$('lh').value;
+      const ls = +$('ls').value;
+      const cBg = $('c-bg').value;
+      const cFace = $('c-face').value;
+      const cDepth = $('c-depth').value;
+      const cShadow = $('c-shadow').value;
+      const angle = +$('angle').value;
+      const shadowLen = +$('shadow').value;
+      const depthLen = +$('depth').value;
+      const contourLen = +$('contour').value;
+      const rot = +$('rot').value;
+      const skew = +$('skew').value;
+
+      // Anzeigewerte
+      $('v-fs').textContent = fs;
+      $('v-lh').textContent = lh.toFixed(2);
+      $('v-ls').textContent = ls.toFixed(3);
+      $('v-angle').textContent = angle;
+      $('v-shadow').textContent = shadowLen;
+      $('v-depth').textContent = depthLen;
+      $('v-contour').textContent = contourLen;
+      $('v-rot').textContent = rot;
+      $('v-skew').textContent = skew;
+
+      // Hex-Anzeige spiegelt die Color-Inputs (auch nach Reset)
+      $('hex-bg').textContent = cBg;
+      $('hex-face').textContent = cFace;
+      $('hex-depth').textContent = cDepth;
+      $('hex-shadow').textContent = cShadow;
+
+      // Logo: Text als Multi-Line
+      logo.textContent = text;
+
+      // text-shadow direkt mit Hex-Werten anwenden (Browser kennt die var() nicht
+      // automatisch in inline-Styles, daher hier direkte Werte)
+      const rad = angle * Math.PI / 180;
+      const dx = Math.sin(rad);
+      const dy = -Math.cos(rad);
+      const round = n => Math.round(n * 100) / 100;
+      const inlineShadows = [];
+      for (let i = 1; i <= contourLen; i++) {
+        inlineShadows.push(`${round(dx * i)}px ${round(dy * i)}px 0 ${cShadow}`);
+      }
+      for (let i = 1; i <= depthLen; i++) {
+        inlineShadows.push(`${round(-dx * i)}px ${round(-dy * i)}px 0 ${cDepth}`);
+      }
+      for (let i = contourLen + 1; i <= contourLen + shadowLen; i++) {
+        inlineShadows.push(`${round(dx * i)}px ${round(dy * i)}px 0 ${cShadow}`);
+      }
+
+      logo.style.textShadow = inlineShadows.length ? inlineShadows.join(', ') : 'none';
+      logo.style.transform = `rotate(${rot}deg) skewX(${skew}deg)`;
+      logo.style.fontFamily = `'${font}', 'Bebas Neue', Impact, sans-serif`;
+      logo.style.color = cFace;
+      logo.style.fontSize = fs + 'vw';
+      logo.style.lineHeight = lh;
+      logo.style.letterSpacing = ls + 'em';
+      document.body.style.background = cBg;
+
+      // CSS-Output mit Variablen — sauber, idiomatisch, modern
+      const shadowLines = buildShadows(angle, shadowLen, depthLen, contourLen);
+      const css = `:root {
+  --bg:     ${cBg};
+  --face:   ${cFace};
+  --depth:  ${cDepth};
+  --shadow: ${cShadow};
+}
+
+body {
+  background: var(--bg);
+}
+
+.logo {
+  font-family: '${font}', sans-serif;
+  font-size: ${fs}vw;
+  line-height: ${lh};
+  letter-spacing: ${ls}em;
+  color: var(--face);
+  transform: rotate(${rot}deg) skewX(${skew}deg);
+  white-space: pre-line;
+  text-shadow:
+${shadowLines.join(',\n')};
+}`;
+      cssout.textContent = css;
+    }
+
+    // Inputs binden
+    document.querySelectorAll('.panel input, .panel select, .panel textarea').forEach(el => {
+      el.addEventListener('input', update);
+    });
+
+    $('copyBtn').addEventListener('click', async () => {
+      try {
+        await navigator.clipboard.writeText(cssout.textContent);
+        const btn = $('copyBtn');
+        btn.textContent = 'Kopiert!';
+        btn.classList.add('copied');
+        setTimeout(() => {
+          btn.textContent = 'CSS kopieren';
+          btn.classList.remove('copied');
+        }, 1500);
+      } catch (err) {
+        alert('Kopieren fehlgeschlagen — bitte manuell aus dem Code-Feld kopieren.');
+      }
+    });
+
+    // Native <button type="reset"> setzt alle Felder auf ihre value=-Attribute zurück;
+    // danach (nächster Tick) neu rendern.
+    const form = $('logoForm');
+    form.addEventListener('reset', () => setTimeout(update, 0));
+    form.addEventListener('submit', e => e.preventDefault());
+
+    update();
+  </script>
+</body>
+</html>

package.json

@@ -0,0 +1,16 @@
+{
+  "name": "demo-ecmascript",
+  "version": "1.0.0",
+  "description": "",
+  "repository": {
+    "type": "git",
+    "url": "ssh://tengo@git.librete.ch:41240/public/demo-ecmascript.git"
+  },
+  "license": "WTFPL",
+  "author": "",
+  "type": "module",
+  "main": "index.html",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  }
+}