diff --git a/web/chat/chat-message-list-container.css b/web/chat/chat-message-list-container.css
--- a/web/chat/chat-message-list-container.css
+++ b/web/chat/chat-message-list-container.css
@@ -1,5 +1,6 @@
 div.container {
   flex: 1;
+  overflow: hidden;
   background-color: var(--bg);
   display: flex;
   flex-direction: column;
diff --git a/web/style.css b/web/style.css
--- a/web/style.css
+++ b/web/style.css
@@ -90,10 +90,12 @@
   position: relative;
   grid-area: app;
   display: flex;
+  overflow: hidden;
 }
 div.main-content {
   display: flex;
   flex: 1;
+  overflow: hidden;
 }
 
 div.upper-right {