diff --git a/frontend/index.html b/frontend/index.html
index 3d16e2e..22960d8 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -160,7 +160,7 @@
 
   .panel{
     background:var(--card);
-    border:1px solid rgba(36,52,71,.14);
+    border:1px solid rgba(15,118,110,.30);   /* dezentes Petrol */
     border-radius:12px;
     overflow:hidden;
     display:flex;flex-direction:column;min-height:0;min-width:0;