[gnome-photos/wip/jimmac/preview-shading] theme: style filter buttons

[Jakub Steiner <jimmac src gnome org>]

commit e17c1e1502ec81e4849106b28e7827f56c790b71
Author: Jakub Steiner <jimmac gmail com>
Date:   Thu Jan 10 15:27:43 2019 +0100

    theme: style filter buttons

 data/Adwaita.css | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/data/Adwaita.css b/data/Adwaita.css
index 835996a1..144a4986 100644
--- a/data/Adwaita.css
+++ b/data/Adwaita.css
@@ -45,3 +45,9 @@ GdMainIconView.content-view.cell:active {
     background-color: @photos_collection_bg;
     border-radius: 8px;
 }
+
+button.photos-tool-filter-button:checked {
+    background: @theme_selected_bg_color;
+    color: @theme_selected_fg_color;
+    icon-shadow: 0 3px 3px shade(@theme_selected_bg_color,0.7);
+}