Refactor CSS styles and update HTML structure for the "Über Uns" section

Styles/style.css

@@ -67,7 +67,7 @@ section {
 }
 
 #patenshop {
-    background: linear-gradient(90deg, rgb(0, 159, 155), rgb(157, 254, 175));
+    background: linear-gradient(0deg, rgb(255, 255, 255), rgb(157, 254, 175));
 
 }
 
@@ -95,6 +95,7 @@ section {
 
 footer {
     height: 160px;
+    background-color: white;
 }
 
 .swiper {