diff --git a/sorting_visualization.html b/sorting_visualization.html
index d75fee8..ee4254d 100644
--- a/sorting_visualization.html
+++ b/sorting_visualization.html
@@ -140,13 +140,6 @@
       .info-card { padding: 0.75rem !important; }
     }
 
-    /* ── Mobile-first responsive tweaks ── */
-    @media (max-width: 640px) {
-      .stat-desc { display: none; }
-      .stat-card { padding: 0.5rem !important; }
-      .info-card { padding: 0.75rem !important; }
-    }
-
     /* ── Sticky Sidebar (Desktop ≥1024px) ── */
     @media (min-width: 1024px) {
       .app-layout {
@@ -179,11 +172,6 @@
       .anim-header, .anim-section, .anim-stat { animation: none !important; }
     }
 
-    /* ── Reduced Motion ── */
-    @media (prefers-reduced-motion: reduce) {
-      .anim-header, .anim-section, .anim-stat { animation: none !important; }
-    }
-
     /* ── Progress Bar ── */
     .progress-track {
       height: 4px;
@@ -209,7 +197,7 @@
       <div class="flex-1"></div>
       <div class="text-center">
         <h1 class="title-text font-bold tracking-tight" style="color: var(--c-text); text-shadow: 0 0 40px rgba(74,124,255,0.3);">
-          Sortier-Algorithmen <span style="font-size: 0.45em; font-weight: 400; opacity: 0.5; vertical-align: middle;">v0.2.3</span>
+          Sortier-Algorithmen <span style="font-size: 0.45em; font-weight: 400; opacity: 0.5; vertical-align: middle;">v0.2.5</span>
         </h1>
         <p class="text-muted text-sm mt-0.5">Interaktive Visualisierung mit schrittweiser Animation</p>
       </div>
@@ -2751,14 +2739,12 @@ function doReset() {
 // Combined Play/Pause button
 $btnPlayPause.addEventListener('click', function() {
   if (isRunning && !isPaused) {
-    // Currently playing → pause
     stopTimer();
     isPaused = true;
     updateButtonStates();
     return;
   }
   if (!isRunning) {
-    // Not started → start; skip generateArray() if Reset already prepared a fresh array
     if (!arrayFresh) { generateArray(); }
     arrayFresh = false;
     renderCurrent();
@@ -2775,27 +2761,6 @@ $btnPlayPause.addEventListener('click', function() {
   scheduleNext();
 });
 
-// Step forward
-$btnStep.addEventListener('click', function() {
-  if (!isRunning) {
-    if (!arrayFresh) { generateArray(); }
-    arrayFresh = false;
-    renderCurrent();
-    steps = buildSteps($algoSelect.value);
-    stepIndex = 0;
-    startTime = 0;
-    elapsedMs = 0;
-    setStats(0, 0, 0, 0);
-    $statTime.textContent = '0 ms';
-    isRunning = true;
-    isPaused = true;
-  }
-  isRunning = true;
-  isPaused = false;
-  updateButtonStates();
-  scheduleNext();
-});
-
 // Step forward
 $btnStep.addEventListener('click', function() {
   if (!isRunning) {
@@ -2870,28 +2835,6 @@ $presetSelect.addEventListener('change', function() {
   writeUrlState();
 });
 
-$sizeSlider.addEventListener('input', function() {
-  updateSizeLabel();
-  if (!isRunning) doReset();
-  writeUrlState();
-});
-
-$algoSelect.addEventListener('change', function() {
-  updateThreadSlider();
-  if (!isRunning) doReset();
-  writeUrlState();
-});
-
-$threadSlider.addEventListener('input', function() {
-  $threadVal.textContent = $threadSlider.value;
-  if (isRunning && !isPaused) scheduleNext();
-});
-
-$presetSelect.addEventListener('change', function() {
-  if (!isRunning) doReset();
-  writeUrlState();
-});
-
 $customArray.addEventListener('change', function() {
   if (!isRunning) doReset();
 });