[gnome-shell-sass] windowPreview: Overhaul chrome style

[Florian Müllner <fmuellner src gnome org>]

commit 15ecbbc0c1c748da53ad52e8fa7db4cd803134fa
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Jan 8 12:11:06 2021 +0100

    windowPreview: Overhaul chrome style
    
     - increase close button size
     - use custom close icon that's better suited
       for the non-default 24pxp size
     - use translucent light gray for both close button
       and window caption
    
    https://gitlab.gnome.org/Teams/Design/os-mockups/-/issues/81
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1605>

 widgets/_window-picker.scss | 27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)
---
diff --git a/widgets/_window-picker.scss b/widgets/_window-picker.scss
index a39af15..d157b91 100644
--- a/widgets/_window-picker.scss
+++ b/widgets/_window-picker.scss
@@ -3,7 +3,10 @@
 $window_picker_spacing: $base_spacing; // 6px
 $window_picker_padding: $base_padding * 2; // 12px
 
-$window_close_button_size: 24px;
+$window_thumbnail_chrome_color: transparentize($osd_fg_color, 0.4);
+$window_thumbnail_chrome_border: transparentize($osd_bg_color, 0.7);
+
+$window_close_button_size: 30px;
 $window_close_button_padding: 3px;
 
 // Window picker
@@ -14,31 +17,31 @@ $window_close_button_padding: 3px;
 
 // Window titles
 .window-caption {
-  color: $osd_fg_color;
-  background-color: $osd_bg_color;
-  border:1px solid $osd_outer_borders_color;
-  border-radius: $base_border_radius + 1;
+  color: $osd_bg_color;
+  background-color: $window_thumbnail_chrome_color;
+  border-radius: 99px;
+  border: 1px solid $window_thumbnail_chrome_border;
   padding: $base_padding $base_padding * 2;
-  font-weight: bold;
-  @include fontsize($base_font_size + 1);
 }
 
 // Close button
 .window-close {
-  background-color: $selected_bg_color;
-  color: $selected_fg_color;
-  border: none;
+  background-color: $window_thumbnail_chrome_color;
+  color: $osd_bg_color;
+  border: 1px solid $window_thumbnail_chrome_border;
   border-radius: $window_close_button_size * 0.5 + $window_close_button_padding * 2;
   padding: $window_close_button_padding;
   height: $window_close_button_size;
   width: $window_close_button_size;
   box-shadow: -1px 1px 5px 0px rgba(0,0,0,0.5);
 
+  & StIcon { icon-size: 24px; }
+
   &:hover {
-    background-color: lighten($selected_bg_color, 5%);
+    background-color: lighten($window_thumbnail_chrome_color, 5%);
   }
 
   &:active {
-    background-color: darken($selected_bg_color, 5%);
+    background-color: darken($window_thumbnail_chrome_color, 5%);
   }
 }