diff --git a/app/static/script.js b/app/static/script.js
index 45701b5..e35a19d 100644
--- a/app/static/script.js
+++ b/app/static/script.js
@@ -1,11 +1,9 @@
-let mainMode = null; // 'vocab' oder 'irregular'
-let subMode = null;  // 'de-en', 'start-german', etc.
+let mainMode = null; 
+let subMode = null;  
 let selectedPages = [];
 let currentCard = null;
 let stats = { correct: 0, total: 0 };
 
-// --- SETUP LOGIC ---
-
 function selectMainMode(mode) {
     mainMode = mode;
     subMode = null; 
@@ -24,13 +22,13 @@ function selectMainMode(mode) {
 
 function selectSubMode(mode) {
     subMode = mode;
-    
     document.querySelectorAll('.sub-btn').forEach(b => b.classList.remove('active'));
     document.getElementById(`btn-sub-${mode}`).classList.add('active');
 
     document.getElementById('page-section').style.display = 'block';
-    document.getElementById('btn-start').disabled = false;
-    document.getElementById('btn-start').style.opacity = '1';
+    
+    // Button Check: Nur aktivieren wenn Seiten gewählt sind
+    updatePageDisplay();
 }
 
 function fetchPages(type) {
@@ -40,15 +38,16 @@ function fetchPages(type) {
             const list = document.getElementById('page-list');
             list.innerHTML = '';
             
-            // Standard: Alle auswählen
-            selectedPages = pages; 
-            updatePageDisplay();
+            // WICHTIG: selectedPages resetten und KEINE Haken standardmäßig setzen
+            selectedPages = [];
+            updatePageDisplay(); // Zeigt "Keine Seiten gewählt!"
 
             pages.forEach(p => {
                 const div = document.createElement('div');
                 div.className = 'page-item';
+                // Hier KEIN 'checked' Attribut mehr
                 div.innerHTML = `
-                    <input type="checkbox" id="p-${p}" value="${p}" checked onchange="updatePageSelection()">
+                    <input type="checkbox" id="p-${p}" value="${p}" onchange="updatePageSelection()">
                     <label for="p-${p}">${p}</label>
                 `;
                 list.appendChild(div);
@@ -56,7 +55,6 @@ function fetchPages(type) {
         });
 }
 
-// --- NEU: FUNKTION FÜR "ALLE AN / ALLE AUS" ---
 function toggleAllPages(state) {
     const checkboxes = document.querySelectorAll('#page-list input');
     checkboxes.forEach(cb => {
@@ -73,32 +71,31 @@ function updatePageSelection() {
 
 function updatePageDisplay() {
     const d = document.getElementById('selected-pages-display');
+    const btn = document.getElementById('btn-start');
+
     if (selectedPages.length === 0) {
         d.innerText = "Keine Seiten gewählt!";
         d.style.color = "red";
-        document.getElementById('btn-start').disabled = true;
+        btn.disabled = true;
     } else {
         d.innerText = `Seiten: ${selectedPages.join(', ')}`;
         d.style.color = "#555";
-        if (subMode) document.getElementById('btn-start').disabled = false;
+        if (subMode) btn.disabled = false;
     }
 }
 
-// --- QUIZ LOGIC ---
-
+// --- QUIZ LOGIC (Unverändert) ---
 function startQuiz() {
     stats = { correct: 0, total: 0 };
     updateStats();
     document.getElementById('setup-screen').style.display = 'none';
-    document.getElementById('quiz-screen').style.display = 'flex';
-    document.querySelector('.container').style.justifyContent = 'flex-start'; // Nach oben schieben
+    document.getElementById('quiz-screen').style.display = 'flex'; // Flex, wegen CSS column
     nextQuestion();
 }
 
 function stopQuiz() {
     document.getElementById('quiz-screen').style.display = 'none';
     document.getElementById('setup-screen').style.display = 'block';
-    document.querySelector('.container').style.justifyContent = 'center'; // Wieder mittig
 }
 
 function nextQuestion() {