GTK3: Improve nautilus floating-bar design

src/themes/Kali/sass/gtk-sass/_applications.scss

@@ -7,6 +7,8 @@ $panel_bg : transparentize($bg_color, if($variant=='light', .1, .2));
 @define-color disk_space_used #{"" +$selected_bg_color};
 @define-color disk_space_free white;
 
+
+$_glow_shadow: 0 1px 4px transparentize($selected_bg_color, .5);
 filechooser,
 .nautilus-window {
   placessidebar.sidebar {
@@ -28,7 +30,10 @@ filechooser,
         margin-left: 6px;
         margin-right: 6px;
         border-radius: $button_radius;
-        box-shadow: 0 2px 4px transparentize($selected_bg_color, .5);
+        box-shadow: $_glow_shadow;
+        transition: box-shadow $backdrop_transition;
+
+        &:backdrop { box-shadow: none; }
 
         &:dir(ltr) {
           background-image: linear-gradient(to right, darken($selected_bg_color, 10%) 35px, transparent 0);
@@ -50,6 +55,26 @@ filechooser,
   }
 }
 
+.floating-bar {
+  background-color: $selected_bg_color;
+  border-color: $selected_borders_color;
+  margin: 10px;
+  box-shadow: $_glow_shadow;
+  transition: background-color $backdrop_transition;
+
+  &:backdrop {
+    box-shadow: none;
+    border-color: $borders_color;
+  }
+
+  &.bottom {
+    &.left, &.right{
+      border-radius: $button_radius;
+      border-style: solid;
+    }
+  }
+}
+
 /* XFCE4 PANEL */
 .xfce4-panel {
   &.background { background: $panel_bg; }