.alert-warning {
    background-color: #158cba;
    border-color: #158cba;
    color: #fff;
}
.alert-success {
    background-color: #158cba;
    border-color: #158cba;
    color: #fff;
}
/* More specific selector - no !important needed */
.fc.fc-theme-standard .fc-list-day-cushion {
  background-color: #1a1a1a;
  color: #ffffff;
  font-weight: 600;
  padding: 8px 12px;
}