[gnome-themes-standard] notebook: tweak background gradient for active notebook tab

[Cosimo Cecchi <cosimoc src gnome org>]

commit f6f7af86af58942f7f485e10f05381448eceec48
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Thu Jun 16 23:54:58 2011 -0400

    notebook: tweak background gradient for active notebook tab

 themes/Adwaita/gtk-3.0/gtk-widgets.css |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/themes/Adwaita/gtk-3.0/gtk-widgets.css b/themes/Adwaita/gtk-3.0/gtk-widgets.css
index dd116fd..1b21c7e 100644
--- a/themes/Adwaita/gtk-3.0/gtk-widgets.css
+++ b/themes/Adwaita/gtk-3.0/gtk-widgets.css
@@ -424,8 +424,10 @@ GtkScrolledWindow.frame {
                                              to (@notebook_border));
 
     -adwaita-selected-tab-color: @notebook_selected_tab_color;
-    background-color: @theme_base_color;
-    background-image: none;
+    background-image: -gtk-gradient (linear,
+                                     left top, left bottom,
+                                     from (shade (@theme_base_color, 0.98)),
+                                     to (@theme_base_color));
 }
 
 .notebook tab .button,