diff --git a/packages/ui/src/styles/messaging/message-base.css b/packages/ui/src/styles/messaging/message-base.css
index ce7bb9c6..9c6b4459 100644
--- a/packages/ui/src/styles/messaging/message-base.css
+++ b/packages/ui/src/styles/messaging/message-base.css
@@ -235,19 +235,19 @@
 }
 
 .message-reasoning-indicator {
-  line-height: 1;
   display: inline-flex;
   align-items: center;
   justify-content: center;
-  min-width: 2.25rem;
   height: 1.5rem;
-  padding: 0 0.65rem;
+  padding: 0 0.75rem;
   border: 1px solid var(--border-base);
   border-radius: 0.375rem;
   background-color: transparent;
   color: var(--text-muted);
   font-weight: var(--font-weight-semibold);
-  font-size: 0.85rem;
+  font-size: 0.75rem;
+  line-height: 1;
+  letter-spacing: 0.01em;
   transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
 }