Add React + Vite port of the logo generator

Full React port sharing src/logo.js core (shadow geometry, CSS
output, defaults, font list). App.jsx holds the entire state in a
single useState object; controlled inputs drive the live render and
generated CSS. Keeps the accessibility markup (labels, aria,
<details>/<summary>, focus rings) from the html/vanilla versions;
reset restores defaults via the form's onReset.

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

index.html

@@ -7,100 +7,7 @@
   <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">
 </head>
 <body>
-  <div class="logo" id="logo">LIBRE
+  <div id="root"></div>
-TECH</div>
+  <script type="module" src="/src/main.jsx"></script>
-
-  <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 type="module" src="/src/main.js"></script>
 </body>
 </html>

package-lock.json

@@ -1,17 +1,304 @@
 {
-  "name": "demo-ecmascript",
+  "name": "demo-ecmascript-react",
   "version": "1.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
-      "name": "demo-ecmascript",
+      "name": "demo-ecmascript-react",
       "version": "1.0.0",
       "license": "WTFPL",
+      "dependencies": {
+        "react": "^19.0.0",
+        "react-dom": "^19.0.0"
+      },
       "devDependencies": {
+        "@vitejs/plugin-react": "^4.3.4",
         "vite": "^6.0.0"
       }
     },
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
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+        "js-tokens": "^4.0.0",
+        "picocolors": "^1.1.1"
+      },
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+        "@babel/types": "^7.29.7",
+        "debug": "^4.3.1"
+      },
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+      "dependencies": {
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+      },
+      "engines": {
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     "node_modules/@esbuild/aix-ppc64": {
       "version": "0.25.12",
       "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.25.12.tgz",
@@ -454,6 +741,63 @@
         "node": ">=18"
       }
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/sourcemap-codec": "^1.5.0",
+        "@jridgewell/trace-mapping": "^0.3.24"
+      }
+    },
+    "node_modules/@jridgewell/remapping": {
+      "version": "2.3.5",
+      "resolved": "https://registry.npmjs.org/@jridgewell/remapping/-/remapping-2.3.5.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/gen-mapping": "^0.3.5",
+        "@jridgewell/trace-mapping": "^0.3.24"
+      }
+    },
+    "node_modules/@jridgewell/resolve-uri": {
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+      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz",
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+      "license": "MIT",
+      "engines": {
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+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/@jridgewell/trace-mapping": {
+      "version": "0.3.31",
+      "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.31.tgz",
+      "integrity": "sha512-zzNR+SdQSDJzc8joaeP8QQoCQr8NuYx2dIIytl1QeBEZHJ9uW6hebsrYgbz8hJwUQao3TWCMtmfV8Nu1twOLAw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/resolve-uri": "^3.1.0",
+        "@jridgewell/sourcemap-codec": "^1.4.14"
+      }
+    },
+    "node_modules/@rolldown/pluginutils": {
+      "version": "1.0.0-beta.27",
+      "resolved": "https://registry.npmjs.org/@rolldown/pluginutils/-/pluginutils-1.0.0-beta.27.tgz",
+      "integrity": "sha512-+d0F4MKMCbeVUJwG96uQ4SgAznZNSq93I3V+9NHA4OpvqG8mRCpGdKmK8l/dl02h2CCDHwW2FqilnTyDcAnqjA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@rollup/rollup-android-arm-eabi": {
       "version": "4.60.4",
       "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.60.4.tgz",
@@ -843,6 +1187,51 @@
         "win32"
       ]
     },
+    "node_modules/@types/babel__core": {
+      "version": "7.20.5",
+      "resolved": "https://registry.npmjs.org/@types/babel__core/-/babel__core-7.20.5.tgz",
+      "integrity": "sha512-qoQprZvz5wQFJwMDqeseRXWv3rqMvhgpbXFfVyWhbx9X47POIA6i/+dXefEmZKoAgOaTdaIgNSMqMIU61yRyzA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/parser": "^7.20.7",
+        "@babel/types": "^7.20.7",
+        "@types/babel__generator": "*",
+        "@types/babel__template": "*",
+        "@types/babel__traverse": "*"
+      }
+    },
+    "node_modules/@types/babel__generator": {
+      "version": "7.27.0",
+      "resolved": "https://registry.npmjs.org/@types/babel__generator/-/babel__generator-7.27.0.tgz",
+      "integrity": "sha512-ufFd2Xi92OAVPYsy+P4n7/U7e68fex0+Ee8gSG9KX7eo084CWiQ4sdxktvdl0bOPupXtVJPY19zk6EwWqUQ8lg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/types": "^7.0.0"
+      }
+    },
+    "node_modules/@types/babel__template": {
+      "version": "7.4.4",
+      "resolved": "https://registry.npmjs.org/@types/babel__template/-/babel__template-7.4.4.tgz",
+      "integrity": "sha512-h/NUaSyG5EyxBIp8YRxo4RMe2/qQgvyowRwVMzhYhBCONbW8PUsg4lkFMrhgZhUe5z3L3MiLDuvyJ/CaPa2A8A==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/parser": "^7.1.0",
+        "@babel/types": "^7.0.0"
+      }
+    },
+    "node_modules/@types/babel__traverse": {
+      "version": "7.28.0",
+      "resolved": "https://registry.npmjs.org/@types/babel__traverse/-/babel__traverse-7.28.0.tgz",
+      "integrity": "sha512-8PvcXf70gTDZBgt9ptxJ8elBeBjcLOAcOtoO/mPJjtji1+CdGbHgm77om1GrsPxsiE+uXIpNSK64UYaIwQXd4Q==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/types": "^7.28.2"
+      }
+    },
     "node_modules/@types/estree": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.8.tgz",
@@ -850,6 +1239,127 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@vitejs/plugin-react": {
+      "version": "4.7.0",
+      "resolved": "https://registry.npmjs.org/@vitejs/plugin-react/-/plugin-react-4.7.0.tgz",
+      "integrity": "sha512-gUu9hwfWvvEDBBmgtAowQCojwZmJ5mcLn3aufeCsitijs3+f2NsrPtlAWIR6OPiqljl96GVCUbLe0HyqIpVaoA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/core": "^7.28.0",
+        "@babel/plugin-transform-react-jsx-self": "^7.27.1",
+        "@babel/plugin-transform-react-jsx-source": "^7.27.1",
+        "@rolldown/pluginutils": "1.0.0-beta.27",
+        "@types/babel__core": "^7.20.5",
+        "react-refresh": "^0.17.0"
+      },
+      "engines": {
+        "node": "^14.18.0 || >=16.0.0"
+      },
+      "peerDependencies": {
+        "vite": "^4.2.0 || ^5.0.0 || ^6.0.0 || ^7.0.0"
+      }
+    },
+    "node_modules/baseline-browser-mapping": {
+      "version": "2.10.32",
+      "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.10.32.tgz",
+      "integrity": "sha512-wbPvpyjJPC0zdfdKXxqEL3Ea+bOMD/87X4lftiJkkaBiuG6ALQy1SLmEd7BSmVCuwCQsBrCamgBoLyfFDD1EPg==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "baseline-browser-mapping": "dist/cli.cjs"
+      },
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/browserslist": {
+      "version": "4.28.2",
+      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.28.2.tgz",
+      "integrity": "sha512-48xSriZYYg+8qXna9kwqjIVzuQxi+KYWp2+5nCYnYKPTr0LvD89Jqk2Or5ogxz0NUMfIjhh2lIUX/LyX9B4oIg==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/browserslist"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/browserslist"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/ai"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "baseline-browser-mapping": "^2.10.12",
+        "caniuse-lite": "^1.0.30001782",
+        "electron-to-chromium": "^1.5.328",
+        "node-releases": "^2.0.36",
+        "update-browserslist-db": "^1.2.3"
+      },
+      "bin": {
+        "browserslist": "cli.js"
+      },
+      "engines": {
+        "node": "^6 || ^7 || ^8 || ^9 || ^10 || ^11 || ^12 || >=13.7"
+      }
+    },
+    "node_modules/caniuse-lite": {
+      "version": "1.0.30001793",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001793.tgz",
+      "integrity": "sha512-iwSsYWaCOoh26cV8NwNRViHlrfUvYsHDfRVcbtmw0Kg6PJIZZXwMkj1442FYLBGkeUf1juAsU3DTfxW579mrPA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/browserslist"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/caniuse-lite"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/ai"
+        }
+      ],
+      "license": "CC-BY-4.0"
+    },
+    "node_modules/convert-source-map": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-2.0.0.tgz",
+      "integrity": "sha512-Kvp459HrV2FEJ1CAsi1Ku+MY3kasH19TFykTz2xWmMeq6bk2NU3XXvfJ+Q61m0xktWwt+1HSYf3JZsTms3aRJg==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/debug": {
+      "version": "4.4.3",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.3.tgz",
+      "integrity": "sha512-RGwwWnwQvkVfavKVt22FGLw+xYSdzARwm0ru6DhTVA3umU5hZc28V3kO4stgYryrTlLpuvgI9GiijltAjNbcqA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "ms": "^2.1.3"
+      },
+      "engines": {
+        "node": ">=6.0"
+      },
+      "peerDependenciesMeta": {
+        "supports-color": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/electron-to-chromium": {
+      "version": "1.5.364",
+      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.364.tgz",
+      "integrity": "sha512-G/dYE3+AYhyHwzTwg8UbnXf7zqMERYh7l2jJ3QujhFsH8agSYwtnGAR2aZ7f0AakIKJXd5En/Hre4igIUrdlYw==",
+      "dev": true,
+      "license": "ISC"
+    },
     "node_modules/esbuild": {
       "version": "0.25.12",
       "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.25.12.tgz",
@@ -892,6 +1402,16 @@
         "@esbuild/win32-x64": "0.25.12"
       }
     },
+    "node_modules/escalade": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.2.0.tgz",
+      "integrity": "sha512-WUj2qlxaQtO4g6Pq5c29GTcWGDyd8itL8zTlipgECz3JesAiiOKotd8JU6otB3PACgG6xkJUyVhboMS+bje/jA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/fdir": {
       "version": "6.5.0",
       "resolved": "https://registry.npmjs.org/fdir/-/fdir-6.5.0.tgz",
@@ -925,6 +1445,66 @@
         "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
       }
     },
+    "node_modules/gensync": {
+      "version": "1.0.0-beta.2",
+      "resolved": "https://registry.npmjs.org/gensync/-/gensync-1.0.0-beta.2.tgz",
+      "integrity": "sha512-3hN7NaskYvMDLQY55gnW3NQ+mesEAepTqlg+VEbj7zzqEMBVNhzcGYYeqFo/TlYz6eQiFcp1HcsCZO+nGgS8zg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/js-tokens": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
+      "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/jsesc": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-3.1.0.tgz",
+      "integrity": "sha512-/sM3dO2FOzXjKQhJuo0Q173wf2KOo8t4I8vHy6lF9poUp7bKT0/NHE8fPX23PwfhnykfqnC2xRxOnVw5XuGIaA==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "jsesc": "bin/jsesc"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/json5": {
+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.3.tgz",
+      "integrity": "sha512-XmOWe7eyHYH14cLdVPoyg+GOH3rYX++KpzrylJwSW98t3Nk+U8XOl8FWKOgwtzdb8lXGf6zYwDUzeHMWfxasyg==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "json5": "lib/cli.js"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/lru-cache": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-5.1.1.tgz",
+      "integrity": "sha512-KpNARQA3Iwv+jTA0utUVVbrh+Jlrr1Fv0e56GGzAFOXN7dk/FviaDW8LHmK52DlcH4WP2n6gI8vN1aesBFgo9w==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "yallist": "^3.0.2"
+      }
+    },
+    "node_modules/ms": {
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
+      "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/nanoid": {
       "version": "3.3.12",
       "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.12.tgz",
@@ -944,6 +1524,16 @@
         "node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1"
       }
     },
+    "node_modules/node-releases": {
+      "version": "2.0.46",
+      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.46.tgz",
+      "integrity": "sha512-GYVXHE2KnrzAfsAjl4uP++evGFCrAU1jta4ubEjIG7YWt/64Gqv66a30yKwWczVjA6j3bM4nBwH7Pk1JmDHaxQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/picocolors": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",
@@ -993,6 +1583,37 @@
         "node": "^10 || ^12 || >=14"
       }
     },
+    "node_modules/react": {
+      "version": "19.2.6",
+      "resolved": "https://registry.npmjs.org/react/-/react-19.2.6.tgz",
+      "integrity": "sha512-sfWGGfavi0xr8Pg0sVsyHMAOziVYKgPLNrS7ig+ivMNb3wbCBw3KxtflsGBAwD3gYQlE/AEZsTLgToRrSCjb0Q==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/react-dom": {
+      "version": "19.2.6",
+      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-19.2.6.tgz",
+      "integrity": "sha512-0prMI+hvBbPjsWnxDLxlCGyM8PN6UuWjEUCYmZhO67xIV9Xasa/r/vDnq+Xyq4Lo27g8QSbO5YzARu0D1Sps3g==",
+      "license": "MIT",
+      "dependencies": {
+        "scheduler": "^0.27.0"
+      },
+      "peerDependencies": {
+        "react": "^19.2.6"
+      }
+    },
+    "node_modules/react-refresh": {
+      "version": "0.17.0",
+      "resolved": "https://registry.npmjs.org/react-refresh/-/react-refresh-0.17.0.tgz",
+      "integrity": "sha512-z6F7K9bV85EfseRCp2bzrpyQ0Gkw1uLoCel9XBVWPg/TjRj94SkJzUTGfOa4bs7iJvBWtQG0Wq7wnI0syw3EBQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/rollup": {
       "version": "4.60.4",
       "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.60.4.tgz",
@@ -1038,6 +1659,22 @@
         "fsevents": "~2.3.2"
       }
     },
+    "node_modules/scheduler": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.27.0.tgz",
+      "integrity": "sha512-eNv+WrVbKu1f3vbYJT/xtiF5syA5HPIMtf9IgY/nKg0sWqzAUEvqY/xm7OcZc/qafLx/iO9FgOmeSAp4v5ti/Q==",
+      "license": "MIT"
+    },
+    "node_modules/semver": {
+      "version": "6.3.1",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.1.tgz",
+      "integrity": "sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA==",
+      "dev": true,
+      "license": "ISC",
+      "bin": {
+        "semver": "bin/semver.js"
+      }
+    },
     "node_modules/source-map-js": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.1.tgz",
@@ -1065,6 +1702,37 @@
         "url": "https://github.com/sponsors/SuperchupuDev"
       }
     },
+    "node_modules/update-browserslist-db": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.2.3.tgz",
+      "integrity": "sha512-Js0m9cx+qOgDxo0eMiFGEueWztz+d4+M3rGlmKPT+T4IS/jP4ylw3Nwpu6cpTTP8R1MAC1kF4VbdLt3ARf209w==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/browserslist"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/browserslist"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/ai"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "escalade": "^3.2.0",
+        "picocolors": "^1.1.1"
+      },
+      "bin": {
+        "update-browserslist-db": "cli.js"
+      },
+      "peerDependencies": {
+        "browserslist": ">= 4.21.0"
+      }
+    },
     "node_modules/vite": {
       "version": "6.4.2",
       "resolved": "https://registry.npmjs.org/vite/-/vite-6.4.2.tgz",
@@ -1139,6 +1807,13 @@
           "optional": true
         }
       }
+    },
+    "node_modules/yallist": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
+      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==",
+      "dev": true,
+      "license": "ISC"
     }
   }
 }

package.json

@@ -1,7 +1,7 @@
 {
-  "name": "demo-ecmascript",
+  "name": "demo-ecmascript-react",
   "version": "1.0.0",
-  "description": "LIBRETECH logo generator — vanilla JS + Vite",
+  "description": "LIBRETECH logo generator — React + Vite",
   "repository": {
     "type": "git",
     "url": "ssh://tengo@git.librete.ch:41240/public/demo-ecmascript.git"
@@ -13,7 +13,12 @@
     "build": "vite build",
     "preview": "vite preview"
   },
+  "dependencies": {
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0"
+  },
   "devDependencies": {
+    "@vitejs/plugin-react": "^4.3.4",
     "vite": "^6.0.0"
   }
 }

src/App.jsx

@@ -0,0 +1,135 @@
+import { useEffect, useState } from 'react';
+import { defaults, fonts, logoStyle, cssOutput } from './logo.js';
+
+const FONT_LABELS = { Impact: 'Impact (System)' };
+
+export default function App() {
+  const [s, setS] = useState(defaults);
+  const [copied, setCopied] = useState(false);
+
+  const set = (key) => (value) => setS((prev) => ({ ...prev, [key]: value }));
+  const num = (key) => (e) => set(key)(+e.target.value);
+  const str = (key) => (e) => set(key)(e.target.value);
+
+  useEffect(() => {
+    document.body.style.background = s.bg;
+  }, [s.bg]);
+
+  const css = cssOutput(s);
+
+  const copy = async () => {
+    try {
+      await navigator.clipboard.writeText(css);
+      setCopied(true);
+      setTimeout(() => setCopied(false), 1500);
+    } catch {
+      alert('Kopieren fehlgeschlagen — bitte manuell aus dem Code-Feld kopieren.');
+    }
+  };
+
+  // Controlled inputs are not reset by the browser, so restore defaults here.
+  const reset = (e) => {
+    e.preventDefault();
+    setS(defaults);
+  };
+
+  return (
+    <>
+      <div className="logo" style={logoStyle(s)}>{s.text || ' '}</div>
+
+      <details className="disclosure" id="panel" open>
+        <summary className="toggle-panel">Panel ein/aus</summary>
+
+        <div className="panel">
+          <h1>Logo-Generator</h1>
+
+          <form id="logoForm" onSubmit={(e) => e.preventDefault()} onReset={reset}>
+            <h2>Inhalt</h2>
+            <p className="hint" id="hint-text">Mehrere Zeilen mit Enter trennen.</p>
+            <textarea
+              id="text"
+              rows={2}
+              aria-label="Logo-Text"
+              aria-describedby="hint-text"
+              value={s.text}
+              onChange={str('text')}
+            />
+
+            <h2>Schrift</h2>
+            <select id="font" aria-label="Schriftart" value={s.font} onChange={str('font')}>
+              {fonts.map((f) => (
+                <option key={f} value={f}>{FONT_LABELS[f] || f}</option>
+              ))}
+            </select>
+
+            <div className="row-2col">
+              <div>
+                <label htmlFor="fs">Größe: <span className="val">{s.fs}</span>vw</label>
+                <input type="range" id="fs" min="6" max="30" step="0.5" value={s.fs} onChange={num('fs')} />
+              </div>
+              <div>
+                <label htmlFor="lh">Zeilenabstand: <span className="val">{s.lh.toFixed(2)}</span></label>
+                <input type="range" id="lh" min="0.5" max="2" step="0.05" value={s.lh} onChange={num('lh')} />
+              </div>
+            </div>
+            <label htmlFor="ls">Buchstabenabstand: <span className="val">{s.ls.toFixed(3)}</span>em</label>
+            <input type="range" id="ls" min="-0.15" max="0.3" step="0.005" value={s.ls} onChange={num('ls')} />
+
+            <h2>Farben</h2>
+            <ColorRow id="bg" label="Hintergrund" value={s.bg} onChange={str('bg')} />
+            <ColorRow id="face" label="Face" value={s.face} onChange={str('face')} />
+            <ColorRow id="depth" label="Tiefe" value={s.depth} onChange={str('depth')} />
+            <ColorRow id="shadow" label="Schatten & Kontur" value={s.shadow} onChange={str('shadow')} />
+
+            <h2>Lichtrichtung</h2>
+            <p className="hint">Steuert alle Versätze gleichzeitig — Schatten geht in Lichtrichtung, Tiefe entgegen.</p>
+            <label htmlFor="angle">Winkel: <span className="val">{s.angle}</span>° (0=oben, 90=rechts, 180=unten)</label>
+            <input type="range" id="angle" min="0" max="359" value={s.angle} onChange={num('angle')} />
+
+            <h2>Schichten</h2>
+            <p className="hint">Hinten nach vorn: Schatten · Tiefe · Kontur · Face</p>
+            <label htmlFor="shadow-len">Schatten-Länge: <span className="val">{s.shadowLen}</span>px</label>
+            <input type="range" id="shadow-len" min="0" max="80" value={s.shadowLen} onChange={num('shadowLen')} />
+            <label htmlFor="depth-len">Tiefe (in Gegenrichtung): <span className="val">{s.depthLen}</span>px</label>
+            <input type="range" id="depth-len" min="0" max="30" value={s.depthLen} onChange={num('depthLen')} />
+            <label htmlFor="contour-len">Kontur (vor der Tiefe): <span className="val">{s.contourLen}</span>px</label>
+            <input type="range" id="contour-len" min="0" max="20" value={s.contourLen} onChange={num('contourLen')} />
+
+            <h2>Komposition</h2>
+            <div className="row-2col">
+              <div>
+                <label htmlFor="rot">Drehung: <span className="val">{s.rot}</span>°</label>
+                <input type="range" id="rot" min="-25" max="25" value={s.rot} onChange={num('rot')} />
+              </div>
+              <div>
+                <label htmlFor="skew">Schräge: <span className="val">{s.skew}</span>°</label>
+                <input type="range" id="skew" min="-20" max="20" value={s.skew} onChange={num('skew')} />
+              </div>
+            </div>
+
+            <h2>Generiertes CSS</h2>
+            <code id="cssout">{css}</code>
+            <button
+              type="button"
+              className={'copy-btn' + (copied ? ' copied' : '')}
+              onClick={copy}
+            >
+              {copied ? 'Kopiert!' : 'CSS kopieren'}
+            </button>
+            <button type="reset" className="reset-btn">Zurücksetzen</button>
+          </form>
+        </div>
+      </details>
+    </>
+  );
+}
+
+function ColorRow({ id, label, value, onChange }) {
+  return (
+    <div className="color-row">
+      <input type="color" id={`c-${id}`} value={value} onChange={onChange} aria-labelledby={`lbl-${id}`} />
+      <span className="swatch-label" id={`lbl-${id}`}>{label}</span>
+      <span className="hex">{value}</span>
+    </div>
+  );
+}

src/main.js

@@ -1,83 +0,0 @@
-import './style.css';
-import { inlineTextShadow, cssOutput } from './logo.js';
-
-const $ = (id) => document.getElementById(id);
-const logo = $('logo');
-const cssout = $('cssout');
-
-function readState() {
-  return {
-    text: $('text').value || ' ',
-    font: $('font').value,
-    fs: +$('fs').value,
-    lh: +$('lh').value,
-    ls: +$('ls').value,
-    bg: $('c-bg').value,
-    face: $('c-face').value,
-    depth: $('c-depth').value,
-    shadow: $('c-shadow').value,
-    angle: +$('angle').value,
-    shadowLen: +$('shadow').value,
-    depthLen: +$('depth').value,
-    contourLen: +$('contour').value,
-    rot: +$('rot').value,
-    skew: +$('skew').value,
-  };
-}
-
-function render() {
-  const s = readState();
-
-  $('v-fs').textContent = s.fs;
-  $('v-lh').textContent = s.lh.toFixed(2);
-  $('v-ls').textContent = s.ls.toFixed(3);
-  $('v-angle').textContent = s.angle;
-  $('v-shadow').textContent = s.shadowLen;
-  $('v-depth').textContent = s.depthLen;
-  $('v-contour').textContent = s.contourLen;
-  $('v-rot').textContent = s.rot;
-  $('v-skew').textContent = s.skew;
-  $('hex-bg').textContent = s.bg;
-  $('hex-face').textContent = s.face;
-  $('hex-depth').textContent = s.depth;
-  $('hex-shadow').textContent = s.shadow;
-
-  logo.textContent = s.text;
-  logo.style.textShadow = inlineTextShadow(s);
-  logo.style.transform = `rotate(${s.rot}deg) skewX(${s.skew}deg)`;
-  logo.style.fontFamily = `'${s.font}', 'Bebas Neue', Impact, sans-serif`;
-  logo.style.color = s.face;
-  logo.style.fontSize = s.fs + 'vw';
-  logo.style.lineHeight = s.lh;
-  logo.style.letterSpacing = s.ls + 'em';
-  document.body.style.background = s.bg;
-
-  cssout.textContent = cssOutput(s);
-}
-
-document
-  .querySelectorAll('#logoForm input, #logoForm select, #logoForm textarea')
-  .forEach((el) => el.addEventListener('input', render));
-
-$('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 {
-    alert('Kopieren fehlgeschlagen — bitte manuell aus dem Code-Feld kopieren.');
-  }
-});
-
-// Native <button type="reset"> restores every field to its value= attribute;
-// re-render on the next tick once the reset has applied.
-const form = $('logoForm');
-form.addEventListener('reset', () => setTimeout(render, 0));
-form.addEventListener('submit', (e) => e.preventDefault());
-
-render();

src/main.jsx

@@ -0,0 +1,10 @@
+import { StrictMode } from 'react';
+import { createRoot } from 'react-dom/client';
+import App from './App.jsx';
+import './style.css';
+
+createRoot(document.getElementById('root')).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+);

src/style.css

@@ -9,6 +9,7 @@ body {
   overflow: hidden;
   transition: background 0.15s;
 }
+#root { display: contents; }
 .logo {
   font-size: 18vw;
   font-weight: 400;

vite.config.js

@@ -1,5 +1,6 @@
 import { defineConfig } from 'vite';
+import react from '@vitejs/plugin-react';
 
 export default defineConfig({
-  // index.html at project root is the single entry; defaults are fine.
+  plugins: [react()],
 });