Apparently it's adw, not gtk

Author: wpkelso

lib/Styles/Gtk/Avatar.scss renamed to lib/Styles/Adw/Avatar.scss

@@ -0,0 +1 @@
+@import 'Avatar.scss';

lib/Styles/Adw/Index.scss

@@ -1,5 +1,4 @@
 @import '_classes.scss';
-@import 'Avatar.scss';
 @import 'Arrow.scss';
 @import 'Button.scss';
 @import 'CheckButton.scss';

lib/Styles/Gtk/Index.scss

@@ -49,6 +49,9 @@ $warning-icon-color: $BANANA_500;
 // Gtk Widgets
 // @import 'Gtk/Index.scss';
 
+// Adw widgets
+@import 'Adw/Index.scss';
+
 // Granite widgets
 @import 'Granite/Index.scss';
 

lib/Styles/Index-dark.scss

@@ -49,6 +49,9 @@ $warning-icon-color: mix($BANANA_500, $BANANA_700, $weight: 50%);
 // Gtk Widgets
 // @import 'Gtk/Index.scss';
 
+// Adw widgets
+@import 'Adw/Index.scss';
+
 // Granite widgets
 @import 'Granite/Index.scss';