From 0e3cc3c036e2765464d7edfd69bb60861c525722 Mon Sep 17 00:00:00 2001
From: vinceliuice <vinceliuice@hotmail.com>
Date: Mon, 4 Sep 2023 00:13:44 +0800
Subject: [PATCH] Update _common-4.0.scss

---
 src/sass/gtk/_common-4.0.scss | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/sass/gtk/_common-4.0.scss b/src/sass/gtk/_common-4.0.scss
index 4dcb2d2..5b3229e 100644
--- a/src/sass/gtk/_common-4.0.scss
+++ b/src/sass/gtk/_common-4.0.scss
@@ -2172,6 +2172,13 @@ headerbar {
       background-color: $header_bg_backdrop;
       border-color: if($variant=='light', lighten($header_border, 15%), darken($header_border, 3%));
     }
+
+    &.flat {
+      &, &:backdrop {
+        border: none;
+        background: none;
+      }
+    }
   }
 
   &.default-decoration {