diff --git a/adventskalender/2025/css/main.css b/adventskalender/2025/css/main.css
index d7f28ae..0833478 100644
--- a/adventskalender/2025/css/main.css
+++ b/adventskalender/2025/css/main.css
@@ -107,11 +107,18 @@
 
 /* Grundstil: Mittelnaht sichtbar */
 .door.double {
-  background: linear-gradient(
-    180deg,
-    color-mix(in srgb, var(--ci-darkgreen) 35%, transparent),
-    color-mix(in srgb, var(--ci-blue) 35%, transparent)
-  );
+  background:
+    linear-gradient(
+      90deg,
+      transparent 49.5%,
+      color-mix(in srgb, var(--ci-gold) 80%, transparent) 50%,
+      transparent 50.5%
+    ),
+    linear-gradient(
+      180deg,
+      color-mix(in srgb, var(--ci-darkgreen) 35%, transparent),
+      color-mix(in srgb, var(--ci-blue) 35%, transparent)
+    );
   backdrop-filter: blur(6px);
   -webkit-backdrop-filter: blur(6px);
   border: 2px solid var(--ci-gold);