diff --git a/frontend/src/index.css b/frontend/src/index.css
index 822657c..a15d758 100644
--- a/frontend/src/index.css
+++ b/frontend/src/index.css
@@ -165,21 +165,24 @@
 }
 
 /* Weekend column tint */
-.fc .fc-day-sat,
-.fc .fc-day-sun {
-  background-color: hsl(0 0% 100% / 0.03);
+/* Month view: paint the fc-daygrid-day-frame (FC6 inner div) with 5% white overlay.
+   The parent <td> bg is hidden behind the frame painted by --fc-neutral-bg-color, so
+   the tint must target the frame itself, not the td. */
+.fc .fc-day-sat .fc-daygrid-day-frame,
+.fc .fc-day-sun .fc-daygrid-day-frame {
+  background-color: color-mix(in srgb, white 5%, transparent) !important;
 }
 
-/* Weekend tint: header cells (higher specificity to override .fc-col-header-cell) */
+/* Weekend tint: header cells */
 .fc .fc-col-header-cell.fc-day-sat,
 .fc .fc-col-header-cell.fc-day-sun {
-  background-color: hsl(0 0% 100% / 0.03) !important;
+  background-color: color-mix(in srgb, white 5%, hsl(0 0% 8% / 0.65)) !important;
 }
 
-/* Weekend tint: timegrid column cells */
+/* Weekend tint: timegrid column cells (week/day view) */
 .fc .fc-timegrid-col.fc-day-sat,
 .fc .fc-timegrid-col.fc-day-sun {
-  background-color: hsl(0 0% 100% / 0.03);
+  background-color: color-mix(in srgb, white 5%, transparent) !important;
 }