diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..e98fc68
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,9 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[*.css]
+indent_style = space
+indent_size = 2
diff --git a/chrome/EdgyArc-fr/sidebery.css b/chrome/EdgyArc-fr/sidebery.css
index c6f4493..5d07ee7 100644
--- a/chrome/EdgyArc-fr/sidebery.css
+++ b/chrome/EdgyArc-fr/sidebery.css
@@ -346,13 +346,16 @@
           }
       }
     /* Add separator before new tab button. */
+      @media not (-moz-bool-pref:"af.sidebery.top-new-tab-btn") {
+        &::before {
+          border-top: 1px solid var(--separator-color) !important; 
+        }
+      }
   
        &::before {
       width: calc(100% - var(--tabs-margin)*2) !important;
       inset-inline: auto !important;
       top: 0 !important;
-      @media not (-moz-bool-pref:"af.sidebery.top-new-tab-btn") { 
-          border-top: 1px solid var(--separator-color) !important; }
            
       box-shadow: none !important;
     }
@@ -743,4 +746,4 @@
     }/*end of root*/
 
 
-}
\ No newline at end of file
+}