[gnome-shell/wip/fmuellner/window-close] theme: update css for window close button

[Sam Hewitt <snwh src gnome org>]

commit 2443b22d88e396aedb94b4ad4659a3646ad9da51
Author: Sam Hewitt <sam snwh org>
Date:   Fri Nov 16 11:15:44 2018 -0500

    theme: update css for window close button

 data/theme/gnome-shell-sass/_common.scss | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)
---
diff --git a/data/theme/gnome-shell-sass/_common.scss b/data/theme/gnome-shell-sass/_common.scss
index 4cf3a6afd..c6ae3a878 100644
--- a/data/theme/gnome-shell-sass/_common.scss
+++ b/data/theme/gnome-shell-sass/_common.scss
@@ -1161,23 +1161,25 @@ StScrollBar {
 //close buttons
 
 .window-close {
-  color: #2975c4;
   background-color: white;
-  border: 5px solid #2975c4;
-  border-radius: 20px;
-  height: 20px;
-  width: 20px;
-  -shell-close-overlap: 16px;
+  border-radius: 24px;
+  border: 4px solid $selected_bg_color;
+  box-shadow: inset 0 -4px 0 0 transparentize($selected_bg_color, 0.5);
+  color: $selected_bg_color;
+  height: 24px;
+  width: 24px;
+  -shell-close-overlap: 14px;
 
   &:hover {
-    background-color: #2975c4;
-    color: white;
+    background-color: $selected_bg_color;
     border-color: white;
+    color: white;
   }
+
   &:active {
-    background-color: #a5c8ec;
-    color: #2975c4;
-    border-color: #2975c4;
+    background-color: mix(white, $selected_bg_color, 75%);
+    border-color: $selected_bg_color;
+    color: $selected_bg_color;
   }
 }