diff --git a/adventskalender/shared/style.css b/adventskalender/shared/style.css
index f16754e..e22bf9e 100644
--- a/adventskalender/shared/style.css
+++ b/adventskalender/shared/style.css
@@ -57,17 +57,24 @@ html, body {
 
 /* === Kalenderbild (zentriert, festgelegt, ohne erzwungene Breite) === */
 .kalenderbild {
-  width: 90vw;
-  max-width: 1600px;
-  margin: 2rem auto;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  width: 100vw;
+  height: 100vh;
+  padding: 0;
+  margin: 0;
+  overflow: hidden;
 }
 
 .kalenderbild img {
   width: 100%;
   height: auto;
-  max-height: calc(100vh - 6rem); /* 100% Viewport-Höhe minus Headline/Margins */
+  max-width: 100vw;
+  max-height: 100vh;
+  aspect-ratio: 16 / 9;
   border: 4px solid var(--ci-gold);
   border-radius: 12px;
-  display: block;
   object-fit: contain;
+  display: block;
 }
\ No newline at end of file