diff --git a/packages/ui/src/components/message-part.css b/packages/ui/src/components/message-part.css
index 7d191e8b4..9628fec80 100644
--- a/packages/ui/src/components/message-part.css
+++ b/packages/ui/src/components/message-part.css
@@ -415,23 +415,26 @@
       border: 1.5px solid transparent;
       background:
         linear-gradient(var(--background-base) 0 0) padding-box,
-        conic-gradient(from var(--border-angle),
-          transparent 0deg,
-          transparent 0deg,
-          var(--border-warning-strong, var(--border-warning-selected)) 300deg,
-          var(--border-warning-base) 360deg) border-box;
+        conic-gradient(
+            from var(--border-angle),
+            transparent 0deg,
+            transparent 0deg,
+            var(--border-warning-strong, var(--border-warning-selected)) 300deg,
+            var(--border-warning-base) 360deg
+          )
+          border-box;
       animation: chase-border 2.5s linear infinite;
       pointer-events: none;
       z-index: -1;
     }
 
-    &>*:first-child {
+    & > *:first-child {
       border-top-left-radius: 6px;
       border-top-right-radius: 6px;
       overflow: hidden;
     }
 
-    &>*:last-child {
+    & > *:last-child {
       border-bottom-left-radius: 6px;
       border-bottom-right-radius: 6px;
       overflow: hidden;