diff --git a/openwebui/custom.css b/openwebui/custom.css
index 818b7f1..6c6aad1 100644
--- a/openwebui/custom.css
+++ b/openwebui/custom.css
@@ -43,24 +43,41 @@ body, .app, main, #app {
   color: var(--reltio-text) !important;
 }
 
-/* Wave background via pseudo-element for blur control */
+/* Wave background — matches Reltio Wave_root positioning */
 body::before {
+  content: '';
+  position: fixed;
+  bottom: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  background-image: url('/static/darkWave2.svg');
+  background-size: cover;
+  background-repeat: no-repeat;
+  background-position: 100% 100%;
+  z-index: -1;
+  pointer-events: none;
+  opacity: 1;
+  transition: opacity var(--transition-duration-m, 225ms) cubic-bezier(0.4, 0, 0.2, 1),
+              filter var(--transition-duration-m, 225ms) cubic-bezier(0.4, 0, 0.2, 1);
+}
+
+/* Wave overlay for dimming (like data-wave-overlay) */
+body::after {
   content: '';
   position: fixed;
   top: 0;
   left: 0;
   width: 100%;
   height: 100%;
-  background-image: url('/static/darkWave2.svg');
-  background-repeat: no-repeat;
-  background-position: center bottom;
-  background-size: cover;
+  background-color: rgba(14, 14, 37, 0.9);
   z-index: -1;
-  opacity: 1;
-  transition: opacity 0.3s ease-in-out, filter 0.3s ease-in-out;
+  pointer-events: none;
+  opacity: 0;
+  transition: opacity var(--transition-duration-m, 225ms) cubic-bezier(0.4, 0, 0.2, 1);
 }
 
-/* Blur wave when conversation is active */
+/* Blur wave when conversation is active (matches .layout_root:has([data-conversation=true])) */
 body:has(.messages-container)::before,
 body:has([data-message-role])::before,
 body:has(.chat-messages)::before {