Gnome-Shell: improve background for hovered items in calendar popover

src/themes/Kali/sass/gnome-shell/_common-tweaks.scss

@@ -64,6 +64,14 @@ $_osd_color: if($variant=='light', black, $fg_color);
   }
 }
 
+// menu items
+.popup-menu-item {
+    &.selected, &:active {
+        background-color: $popover_hover_color;
+        color: $fg_color;
+    }
+}
+
 /* App Switcher */
 // switcher onscreen panel
 .switcher-list {
@@ -242,17 +250,30 @@ $_osd_color: if($variant=='light', black, $fg_color);
 .calendar {
   @include notification_bubble($flat: true);
 
+  .pager-button {
+    &:hover, &:focus { background-color: $popover_hover_color }
+  }
+
   .calendar-day-base {
-    &:active, &:selected {
+    &:hover, &:focus,
+    &:active,&:selected {
       color: $fg_color;
-      background-color: if($variant=='light', darken($bg_color, 10%), lighten($bg_color, 10%));
+      background-color: $popover_hover_color;
     }
   }
 
   .calendar-today {
-    &:active, &:selected {
+    &:hover,&:focus {
+      background-color: $popover_hover_color;
+      color: $fg_color;
+    }
+    &:active,&:selected {
       background: $selected_bg_color;
       color: $selected_fg_color;
+      &:hover,&:focus {
+        background-color: $popover_hover_color;
+        color: $fg_color;
+      }
     }
   }
 }