diff --git a/adventskalender/shared/style.css b/adventskalender/shared/style.css
index f104d37..902632b 100644
--- a/adventskalender/shared/style.css
+++ b/adventskalender/shared/style.css
@@ -48,6 +48,7 @@ main > h1 {
 
 /* === Bildcontainer === */
 .kalenderbild {
+  flex: 1 1 auto;
   position: relative; /* Bezugsrahmen für Overlay */
   display: flex;
   align-items: center;