Back-to-Top Button auf allen Seiten hinzugefügt mit Smooth-Scroll und Fade-in/out Effekt

css/style.css

@@ -228,27 +228,49 @@ footer a:hover {
     }
 }
 
-/* Scroll to Top Button (optional) */
-.scroll-to-top {
+/* Back to Top Button */
+.back-to-top {
     position: fixed;
     bottom: 2rem;
     right: 2rem;
-    display: none;
-    width: 3rem;
-    height: 3rem;
+    width: 3.5rem;
+    height: 3.5rem;
     background-color: var(--primary-color);
     color: white;
     border-radius: 50%;
-    text-align: center;
-    line-height: 3rem;
-    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    text-decoration: none;
+    font-size: 2rem;
     z-index: 1000;
+    opacity: 0;
+    visibility: hidden;
     transition: all 0.3s ease;
+    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
 }
 
-.scroll-to-top:hover {
+.back-to-top.show {
+    opacity: 1;
+    visibility: visible;
+}
+
+.back-to-top:hover {
     background-color: var(--secondary-color);
+    color: white;
     transform: translateY(-5px);
+    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
+}
+
+/* Mobile: kleinerer Button */
+@media (max-width: 768px) {
+    .back-to-top {
+        bottom: 1rem;
+        right: 1rem;
+        width: 3rem;
+        height: 3rem;
+        font-size: 1.5rem;
+    }
 }
 
 /* Loading Animation (optional) */