[gnome-builder] libide/editor: style hover assistants

[Christian Hergert <chergert src gnome org>]

commit 7eb2be00033f11489ca0b688ff8bb16b39578036
Author: Christian Hergert <chergert redhat com>
Date:   Tue Sep 6 13:57:07 2022 -0700

    libide/editor: style hover assistants
    
    Related #1778

 src/libide/editor/style.css | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/src/libide/editor/style.css b/src/libide/editor/style.css
index d958de97d..9be2a45e5 100644
--- a/src/libide/editor/style.css
+++ b/src/libide/editor/style.css
@@ -10,3 +10,13 @@ textview.GtkSourceMap:dir(ltr) {
 textview.GtkSourceMap:dir(rtl) {
   border-right: 1px solid @borders;
 }
+
+GtkSourceHoverDisplay {
+  padding: 6px;
+}
+GtkSourceAssistant.hover-assistant {
+  background: @popover_bg_color;
+  color: @popover_fg_color;
+  box-shadow: 0 3px 14px 7px @shadow_color,
+              0 0 0 1px mix(@popover_bg_color, @popover_fg_color, .15);
+}