diff --git a/adventskalender/shared/style.css b/adventskalender/shared/style.css
index 9f0ca11..f16754e 100644
--- a/adventskalender/shared/style.css
+++ b/adventskalender/shared/style.css
@@ -57,15 +57,17 @@ html, body {
 
 /* === Kalenderbild (zentriert, festgelegt, ohne erzwungene Breite) === */
 .kalenderbild {
-  width: 90%;
+  width: 90vw;
   max-width: 1600px;
   margin: 2rem auto;
 }
 
 .kalenderbild img {
-  display: block;
   width: 100%;
   height: auto;
+  max-height: calc(100vh - 6rem); /* 100% Viewport-Höhe minus Headline/Margins */
   border: 4px solid var(--ci-gold);
   border-radius: 12px;
+  display: block;
+  object-fit: contain;
 }
\ No newline at end of file