diff --git a/src/public/stylesheets/style.css b/src/public/stylesheets/style.css
index 11c86a12c..2b288029f 100644
--- a/src/public/stylesheets/style.css
+++ b/src/public/stylesheets/style.css
@@ -1282,7 +1282,7 @@ textarea {
     color: var(--muted-text-color);
 }
 
-body.electron:not(.native-titlebar) .tab-row-container {
+body.electron.platform-darwin:not(.native-titlebar) .tab-row-container {
     padding-left: 2em;
 }
 
@@ -1292,7 +1292,7 @@ body.electron:not(.native-titlebar) .tab-row-container {
 }
 
 .tab-row-container {
-    margin-right: calc(100vw, env(titlebar-area-width, 100vw));
+    margin-right: calc(100vw - env(titlebar-area-width, 100vw));
 }
 
 .tab-row-container .toggle-button {