Update theme

skeleton-auto.css

@@ -67,9 +67,10 @@
         font-size: 16px;
         background-image: url('https://raw.githubusercontent.com/JulianPrieber/winter-wonderland/main/background.png');
         background-size: cover;
-        background-attachment: fixed;
+        background-repeat: no-repeat;
         font-family: 'Inter', sans-serif;
-        height: 100%;
+        max-height: 100%;
+        border: 1px solid transparent;
         color: #1F365C;
         background-position: center center;
       }