GTK3: improve entry visibility

src/themes/Kali/sass/gtk-sass/_common-tweaks.scss

@@ -1,4 +1,5 @@
 $_menu_shadow: 0 1px 6px transparentize(black, if($variant == 'light', .85, .5));
+$_widget_inset_shadow: inset 0 3px 5px -4px $shadow_color;
 $_wm_border: if($variant=='light', transparentize(black, 0.9), transparentize($borders_color, 0.25));
 
 * {
@@ -15,13 +16,30 @@ $_wm_border: if($variant=='light', transparentize(black, 0.9), transparentize($b
   }
 }
 
+/**********
+ * Button *
+ **********/
 %button_active,
 button:active,
 button:checked, {
   background: $dark_fill;
-  box-shadow: inset 0 3px 5px -4px $shadow_color;
+  box-shadow: $_widget_inset_shadow;
 }
 
+/**********
+ * Entry *
+ **********/
+%entry,
+entry {
+  box-shadow: $_widget_inset_shadow;
+  @if ($variant == 'dark') {
+    background-color: $dark_fill;
+  }
+}
+
+/**********
+ * Slider *
+ **********/
 %slider_active {
   background-image: if($variant == 'light', image(lighten($bg_color, 14%)), image(darken($bg_color, 9%)));
 }