fix: trim ghost onepager per issue #8 feedback

Remove Dienstag-Doku line, Ohrwurm button, and Quäl-👻 ad line; add Pinguin-Knie sponsor footer.

Co-authored-by: Cursor <cursoragent@cursor.com>

public/who-let-the-ghost-out/index.html

@@ -190,35 +190,6 @@
       50% { transform: scale(1.35) translateY(-6px); }
     }
 
-    .btn-earworm {
-      display: inline-flex;
-      align-items: center;
-      gap: 0.5rem;
-      margin-top: 1rem;
-      padding: 0.7rem 1.4rem;
-      border: none;
-      border-radius: 2rem;
-      font-weight: 700;
-      font-size: 0.95rem;
-      cursor: pointer;
-      background: linear-gradient(135deg, var(--purple), #6b21a8);
-      color: #fff;
-      box-shadow: 0 4px 24px rgba(179, 102, 255, 0.4);
-      transition: transform 0.15s;
-    }
-
-    .btn-earworm:hover { transform: scale(1.05); }
-    .btn-earworm:active { transform: scale(0.97); }
-
-    .btn-earworm.playing {
-      animation: btn-glow 0.55s ease-in-out infinite;
-    }
-
-    @keyframes btn-glow {
-      0%, 100% { box-shadow: 0 4px 24px rgba(179, 102, 255, 0.4); }
-      50% { box-shadow: 0 4px 36px rgba(200, 255, 0, 0.5); }
-    }
-
     /* —— images —— */
     .scene-grid {
       display: grid;
@@ -334,6 +305,13 @@
 
     footer a { color: var(--purple); }
 
+    footer .sponsor {
+      margin-top: 0.85rem;
+      color: var(--lime);
+      font-size: 0.9rem;
+      font-weight: 600;
+    }
+
     @media (prefers-reduced-motion: reduce) {
       *, *::before, *::after {
         animation-duration: 0.01ms !important;
@@ -374,7 +352,7 @@
 
       <h1 class="motto">Who let the ghost out?</h1>
       <p class="sub-de">
-        Offizielle Doku zum Vorfall vom Dienstag. Der Quäl-👻 ist draußen.
+        Der Quäl-👻 ist draußen.
         Niemand will zugeben, wer die Tür aufgemacht hat.
       </p>
 
@@ -385,9 +363,6 @@
         <div class="chorus-barks" aria-hidden="true">
           <span>👻</span><span>👻</span><span>👻</span><span>👻</span>
         </div>
-        <button type="button" class="btn-earworm" id="earworm-btn" aria-pressed="false">
-          ▶ Ohrwurm starten
-        </button>
       </div>
     </header>
 
@@ -474,7 +449,6 @@
         <div class="warning">
           <strong>Warnung:</strong> Nach dem Besuch dieser Seite summst du
           „Who let the ghost out?“ mindestens bis Freitag.
-          Der Quäl-👻 dankt für die kostenlose Werbung.
         </div>
       </section>
     </main>
@@ -483,71 +457,8 @@
       Erstellt von @cursor · Gitea Issue #8 ·
       <a href="https://gitea.schwenk.online/froxxxy/playground/issues/8">froxxxy/playground</a>
       · Inspiriert von einem bestimmten Hund-Hit aus dem Jahr 2000
+      <p class="sponsor">Diese Seite wurde gesponsert von Pinguin-Knie!</p>
     </footer>
   </div>
-
-  <script>
-    (function () {
-      var btn = document.getElementById('earworm-btn');
-      var running = false;
-      var timer = null;
-      var ctx = null;
-
-      function beep(freq, start, dur) {
-        if (!ctx) return;
-        var osc = ctx.createOscillator();
-        var gain = ctx.createGain();
-        osc.type = 'square';
-        osc.frequency.value = freq;
-        gain.gain.setValueAtTime(0.08, start);
-        gain.gain.exponentialRampToValueAtTime(0.001, start + dur);
-        osc.connect(gain);
-        gain.connect(ctx.destination);
-        osc.start(start);
-        osc.stop(start + dur);
-      }
-
-      function playLoop() {
-        if (!ctx) ctx = new (window.AudioContext || window.webkitAudioContext)();
-        var t = ctx.currentTime;
-        /* woof-woof rhythm: four quick hits */
-        [0, 0.14, 0.28, 0.42].forEach(function (off, i) {
-          beep(280 + i * 40, t + off, 0.1);
-        });
-        /* bass bump */
-        beep(110, t + 0.55, 0.2);
-        beep(165, t + 0.75, 0.15);
-      }
-
-      function tick() {
-        playLoop();
-        if ('speechSynthesis' in window) {
-          window.speechSynthesis.cancel();
-          var u = new SpeechSynthesisUtterance('Who let the ghost out?');
-          u.lang = 'en-US';
-          u.rate = 1.15;
-          u.pitch = 1.1;
-          window.speechSynthesis.speak(u);
-        }
-      }
-
-      btn.addEventListener('click', function () {
-        running = !running;
-        btn.setAttribute('aria-pressed', String(running));
-        if (running) {
-          btn.textContent = '⏸ Ohrwurm stoppen';
-          btn.classList.add('playing');
-          tick();
-          timer = setInterval(tick, 2800);
-        } else {
-          btn.textContent = '▶ Ohrwurm starten';
-          btn.classList.remove('playing');
-          clearInterval(timer);
-          timer = null;
-          if (window.speechSynthesis) window.speechSynthesis.cancel();
-        }
-      });
-    })();
-  </script>
 </body>
 </html>