[gitg] css: Use group at-rules definition

[Alberto Fanjul <albfan src gnome org>]

commit da89c7a7d98952cd8bf3b2964534374af1580336
Author: Alberto Fanjul <albertofanjul gmail com>
Date:   Mon Aug 24 09:52:07 2020 +0200

    css: Use group at-rules definition

 gitg/resources/ui/style.css | 70 +++++++++++++++++++++++----------------------
 1 file changed, 36 insertions(+), 34 deletions(-)
---
diff --git a/gitg/resources/ui/style.css b/gitg/resources/ui/style.css
index e499866b..1f78f1ed 100644
--- a/gitg/resources/ui/style.css
+++ b/gitg/resources/ui/style.css
@@ -1,37 +1,39 @@
-@define-color butter1 #fce94f;
-@define-color butter2 #edd400;
-@define-color butter3 #c4a000;
-
-@define-color orange1 #fcaf3e;
-@define-color orange2 #f57900;
-@define-color orange3 #ce5c00;
-
-@define-color chocolate1 #e9b96e;
-@define-color chocolate2 #c17d11;
-@define-color chocolate3 #8f5902;
-
-@define-color chameleon1 #8ae234;
-@define-color chameleon2 #73d216;
-@define-color chameleon3 #4e9a06;
-
-@define-color skyblue1 #729fcf;
-@define-color skyblue2 #3465a4;
-@define-color skyblue3 #204a87;
-
-@define-color plum1 #ad7fa8;
-@define-color plum2 #75507b;
-@define-color plum3 #5c3566;
-
-@define-color scarletred1 #ef2929;
-@define-color scarletred2 #cc0000;
-@define-color scarletred3 #a40000;
-
-@define-color aluminium1 #eeeeec;
-@define-color aluminium2 #d3d7cf;
-@define-color aluminium3 #babdb6;
-@define-color aluminium4 #888a85;
-@define-color aluminium5 #555753;
-@define-color aluminium6 #2e3436;
+@define-color {
+       butter1 #fce94f;
+       butter2 #edd400;
+       butter3 #c4a000;
+
+       orange1 #fcaf3e;
+       orange2 #f57900;
+       orange3 #ce5c00;
+
+       chocolate1 #e9b96e;
+       chocolate2 #c17d11;
+       chocolate3 #8f5902;
+
+       chameleon1 #8ae234;
+       chameleon2 #73d216;
+       chameleon3 #4e9a06;
+
+       skyblue1 #729fcf;
+       skyblue2 #3465a4;
+       skyblue3 #204a87;
+
+       plum1 #ad7fa8;
+       plum2 #75507b;
+       plum3 #5c3566;
+
+       scarletred1 #ef2929;
+       scarletred2 #cc0000;
+       scarletred3 #a40000;
+
+       aluminium1 #eeeeec;
+       aluminium2 #d3d7cf;
+       aluminium3 #babdb6;
+       aluminium4 #888a85;
+       aluminium5 #555753;
+       aluminium6 #2e3436;
+}
 
 GtkToolbar#toolbar_topnav, GtkToolbar#toolbar_subnav {
        border-left: 0px;