diff --git a/packages/application/style/base.css b/packages/application/style/base.css
index 3d9376a1fb..a88a4bc34a 100644
--- a/packages/application/style/base.css
+++ b/packages/application/style/base.css
@@ -80,13 +80,13 @@ body[data-notebook='edit'] #spacer-widget-bottom {
   box-shadow: var(--jp-elevation-z4);
 }
 
-#main-panel .jp-TreePanel {
+body[data-format='desktop'] #main-panel .jp-TreePanel {
   padding: 0rem 2rem;
 }
 
-@media screen and (max-width: 760px) {
-  #main-panel .jp-TreePanel {
-    padding: 0rem;
+@media only screen and (max-width: 760px) {
+  body[data-format='mobile'] #main-panel .jp-TreePanel {
+    padding: 0rem 0rem;
   }
 }