diff --git a/node/server/public/index.html b/node/server/public/index.html
index eeb98cb..d00a2b8 100644
--- a/node/server/public/index.html
+++ b/node/server/public/index.html
@@ -51,6 +51,7 @@
     font-family: 'Segoe UI', sans-serif;
     box-shadow: 0 12px 64px #000a;
     width: 560px;                /* Feste Standard-Breite Desktop */
+    max-width: calc(100vw - 48px); /* Mindestens 24px Abstand außen */
     min-width: 320px;
     height: auto;
     max-height: calc(100vh - 48px); /* Mindestens 24px Abstand oben/unten */