diff --git a/packages/web/src/components/chat/message-scroller.tsx b/packages/web/src/components/chat/message-scroller.tsx
index ec12658b..2277bb8f 100644
--- a/packages/web/src/components/chat/message-scroller.tsx
+++ b/packages/web/src/components/chat/message-scroller.tsx
@@ -34,7 +34,9 @@ function MessageScroller({
 
 // The viewport fades out at its bottom while there is more below. A browser that can drive the
 // fade from the scroll position does (shadcn's scroll-fade); for one that can't, the viewport
-// says whether it is scrolled to the end, and the stylesheet lifts the fade there.
+// says whether it is scrolled to the end, and the stylesheet lifts the fade there. It takes focus
+// so the arrow keys scroll it, but shows no outline for it: clicking into the conversation would
+// otherwise frame the whole of it.
 function MessageScrollerViewport({
 	className,
 	...props
@@ -45,7 +47,7 @@ function MessageScrollerViewport({
 			data-slot="message-scroller-viewport"
 			data-scrollable-end={scrollable.end}
 			className={cn(
-				'size-full min-h-0 min-w-0 scroll-fade-b scrollbar-thin scrollbar-gutter-stable overflow-y-auto overscroll-contain contain-content data-autoscrolling:scrollbar-thumb-transparent data-autoscrolling:scrollbar-track-transparent data-pending-scroll:invisible',
+				'size-full min-h-0 min-w-0 outline-none scroll-fade-b scrollbar-thin scrollbar-gutter-stable overflow-y-auto overscroll-contain contain-content data-autoscrolling:scrollbar-thumb-transparent data-autoscrolling:scrollbar-track-transparent data-pending-scroll:invisible',
 				className,
 			)}
 			{...props}