diff --git a/src/App.css b/src/App.css
index bd1d83e7..00a3d9c8 100644
--- a/src/App.css
+++ b/src/App.css
@@ -3181,10 +3181,12 @@ body.has-player .chat-fab {
   box-shadow: 0 0 0 2px var(--color-accent);
 }
 
+/* The avatar leads the header's icon row, so the menu hangs from its left
+   edge and opens over the icons: from its right edge, it ran off a phone. */
 .user-menu-dropdown {
   position: absolute;
   top: calc(100% + 0.4rem);
-  right: 0;
+  left: 0;
   min-width: 150px;
   background: var(--color-surface);
   border: var(--border-width) solid var(--color-border-subtle);