diff --git a/plugins/notifications/frontend/views/CalendarView.vue b/plugins/notifications/frontend/views/CalendarView.vue
index bdb5eb2..d7badbb 100644
--- a/plugins/notifications/frontend/views/CalendarView.vue
+++ b/plugins/notifications/frontend/views/CalendarView.vue
@@ -265,6 +265,13 @@ function formatDate(dateStr) {
   min-height: 110px;
 }
 
+/* The calc() height above is viewport-relative, so on a short window - a laptop
+   with a docked browser, or a shopfloor display in portrait - it can resolve
+   smaller than the grid needs. This stops it undercutting the day cells. */
+:deep(.fc) {
+  min-height: 620px;
+}
+
 /* The day number was tight against the top edge once the cells grew. */
 :deep(.fc-daygrid-day-top) {
   padding: 2px 4px;