diff --git a/adventskalender/2025/css/main.css b/adventskalender/2025/css/main.css
index d3bfbda..ba6ace8 100644
--- a/adventskalender/2025/css/main.css
+++ b/adventskalender/2025/css/main.css
@@ -144,6 +144,47 @@
     inset 0 0 10px rgba(255,255,255,0.25);
 }
 
+/* Ergänzung: echtes Öffnen der doppeltüren 6 & 24 mit Pseudo-Flügeln */
+.door.double::before,
+.door.double::after {
+  content: "";
+  position: absolute;
+  top: 0;
+  height: 100%;
+  width: 50%;
+  border-radius: 12px;
+  background:
+    linear-gradient(
+      180deg,
+      color-mix(in srgb, var(--ci-darkgreen) 35%, transparent),
+      color-mix(in srgb, var(--ci-blue) 35%, transparent)
+    );
+  box-shadow:
+    inset 0 0 6px rgba(255,255,255,0.18),
+    0 0 8px rgba(0,0,0,0.3);
+  transition: transform 0.8s ease;
+  transform-style: preserve-3d;
+  backface-visibility: hidden;
+}
+
+.door.double::before { left: 0;  transform-origin: left center; }
+.door.double::after  { right: 0; transform-origin: right center; }
+
+/* beide Flügel öffnen sich symmetrisch */
+.door.double.open::before { transform: rotateY(-115deg); }
+.door.double.open::after  { transform: rotateY(115deg); }
+
+/* Hover bei geöffneter Doppeltür – bleibt offen, bekommt Glow */
+.door.double.open:hover::before,
+.door.double.open:hover::after {
+  transform: scale(1.05) rotateY(var(--fluegel,0));
+  box-shadow:
+    0 0 18px color-mix(in srgb, var(--ci-gold) 50%, transparent),
+    inset 0 0 10px rgba(255,255,255,0.25);
+}
+.door.double.open::before { --fluegel:-115deg; }
+.door.double.open::after  { --fluegel:115deg; }
+
 /* === Offenes Türchen – realistische Folie === */
 .openfield {
   position: absolute;