[gnome-themes-standard] tabs: provide a :hover state

[Jakub Steiner <jimmac src gnome org>]

commit 7b532a9e1d86336ccf435c23b9fce91eaaeb6331
Author: Jakub Steiner <jimmac gmail com>
Date:   Wed Jan 15 16:03:24 2014 +0100

    tabs: provide a :hover state

 themes/Adwaita/gtk-3.0/gtk-widgets.css |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/themes/Adwaita/gtk-3.0/gtk-widgets.css b/themes/Adwaita/gtk-3.0/gtk-widgets.css
index 051ff21..7ea6d2c 100644
--- a/themes/Adwaita/gtk-3.0/gtk-widgets.css
+++ b/themes/Adwaita/gtk-3.0/gtk-widgets.css
@@ -1869,6 +1869,11 @@ GtkLinkButton.button:active {
     background-color: transparent;
 }
 
+.notebook tab:hover {
+  background-color: shade(@theme_bg_color, 0.99);
+  box-shadow: inset 0 3px alpha(black, 0.03), inset 0 2px alpha(black, 0.03), inset 0 1px alpha(black, 0.03);
+}
+
 .notebook tab GtkLabel {
     color: mix (@theme_fg_color, @theme_bg_color, 0.50);
     font-weight: bold;