PTB-fe/styles/app/extras/calendar.scss

/* ========================================================================
     Component: calendar
 ========================================================================== */

.calendar-app {

    .fc-state-highlight,
    .fc-day:hover {
        background-color: #f7f8f9;
    }

    .fc-today {
        background-color: transparent !important;
        .fc-day-number {
            color: $info;
        }
    }

    .fc-day-number {
        font-size: 18px;
        font-weight: bold;
        color: #a1a2a3;
    }

    .fc-event {
        color: #fff !important;
    } // Allow to drag event outside the calendar
    .fc-view {
        overflow: visible;
    }

    @include media-breakpoint-down(lg) {
        // hide views buttons
        .fc-right {
            display: none;
        }
    }
    @include media-breakpoint-down(md) {
        // hide views buttons and date buttons
        .fc-right, .fc-left {
            display: none;
        }
    }

}

// Calendar app styles
// -----------------------
.external-events {
    margin: 0;
    >div {
        // display: inline-block;
        margin-right: 5px;
        margin-bottom: 5px;
        padding: 6px 10px;
        color: #fff;
        font-size: 11px;
        border-radius: 2px;
        cursor: move;
    }
    &:empty {
        content: "EMPTY";
    }
} // Remove events drop area

#external-event-color-selector {
    .circle.selected {
        border: 3px solid rgba(255, 255, 255, .5);
    }
}