[gnome-games/wip/exalm/headerbar: 16/16] css: Make headerbar in fullscreen transparent

[Alexander Mikhaylenko <alexm src gnome org>]

commit de4ea49ccde46c0a367585b018b33fedfc01f985
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Mon Jun 8 22:35:27 2020 +0500

    css: Make headerbar in fullscreen transparent

 data/gtk-style.css | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
---
diff --git a/data/gtk-style.css b/data/gtk-style.css
index 28df6874..407c0453 100644
--- a/data/gtk-style.css
+++ b/data/gtk-style.css
@@ -113,3 +113,19 @@ list.rounded:backdrop,
 list.separators row:not(:last-child) {
        border-bottom: 1px solid rgba(0, 0, 0, 0.15);
 }
+
+window.fullscreen {
+  background: black;
+}
+
+window.fullscreen headerbar {
+  color: #EEEEEC;
+  border-color: alpha(#070707, .75);
+  background: linear-gradient(to top, alpha(#262626, .75), alpha(#2b2b2b, .75));
+}
+
+window.fullscreen headerbar:backdrop {
+  color: #919190;
+  border-color: alpha(#202020, .75);
+  background: image(alpha(#353535, .75));
+}