adwaita: Reset popover background in backdrop

Otherwise it inherits the generic background color from .background

Fixes #2766

diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 104f09d70717eb066f273ff405254e63fee05778..a2f4eab20b9015e1f7957a14c68eec1cef201e1e 100644 (file)
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -1738,6 +1738,10 @@ popover.background {
     box-shadow: 0 1px 2px transparentize(black, 0.7);
   }
 
+  &:backdrop {
+    background-color: transparent;
+  }
+
   > contents {
     padding: 8px;
     border-radius: $popover_radius;