/* Make non-selectable days more visible (darker), without making them look enabled */
.flatpickr-day.flatpickr-disabled,
.flatpickr-day.flatpickr-disabled:hover,
.flatpickr-day.prevMonthDay,
.flatpickr-day.nextMonthDay {
  color: #666 !important;     /* 濃いグレー */
  opacity: 1 !important;      /* デフォルトの薄さを解除 */
  cursor: not-allowed !important;
  background: transparent !important;
  border-color: transparent !important;
}

/* Keep selected/allowed states clear */
.flatpickr-day.selected,
.flatpickr-day.startRange,
.flatpickr-day.endRange {
  font-weight: 600;
}

.flatpickr-day.today:not(.selected) {
  border-color: #666;
}