src/pages/ChangeCalculatorPage.tsx

@@ -34,8 +34,7 @@ const ChangeCalculatorPage: React.FC = () => {
   useEffect(() => {
     const total = moneyItems.reduce((sum, item) => sum + item.value * item.count, 0);
     setCustomerTotal(total);
-    // Allow negative values when customer hasn't paid enough
-    setChangeAmount(total - cartTotal);
+    setChangeAmount(Math.max(0, total - cartTotal));
   }, [moneyItems, cartTotal]);
 
   const handleDenominationClick = (index: number) => {
@@ -91,14 +90,7 @@ const ChangeCalculatorPage: React.FC = () => {
           </div>
           <div className="total-item highlight">
             <span>Restgeld:</span>
-            <span 
-              style={{ 
-                color: changeAmount < 0 ? '#ff0000' : 'inherit',
-                fontWeight: changeAmount < 0 ? 'bold' : 'inherit'
-              }}
-            >
-              {changeAmount.toFixed(2)} €
-            </span>
+            <span>{changeAmount.toFixed(2)} €</span>
           </div>
         </div>
 

src/pages/HomePage.tsx

@@ -39,6 +39,7 @@ const HomePage: React.FC = () => {
             </button>
           </div>
           
+          <h2 className="section-title">{activeTab === 'food' ? 'Essen' : 'Getränke'}</h2>
           <ProductList 
             products={productsData[activeTab]} 
             category={activeTab}