diff --git a/src/gtk3/applications/_chromium.scss b/src/gtk3/applications/_chromium.scss
--- a/src/gtk3/applications/_chromium.scss
+++ b/src/gtk3/applications/_chromium.scss
@@ -66,7 +66,7 @@
         }
       }
     
-      .maximized & {
+      @at-root window.background.chromium.maximized headerbar, .maximized .titlebar {
         button.titlebutton {
           &.maximize {
             color: transparent;