.mbsc-datepicker .mbsc-calendar-cell.mbsc-ltr.check-in {
    background: linear-gradient( to left top, #c75245 50%, transparent 50%) no-repeat;
}

.mbsc-datepicker .mbsc-calendar-cell.mbsc-ltr.check-out {
    background: linear-gradient( to left top, transparent 50%, #c75245 50%) no-repeat;
}

.mbsc-datepicker .mbsc-calendar-cell.mbsc-rtl.check-in {
    background: linear-gradient( to right bottom, #c75245 50%, transparent 50%) no-repeat;
}

.mbsc-datepicker .mbsc-calendar-cell.mbsc-rtl.check-out {
    background: linear-gradient( to right bottom, transparent 50%, #c75245 50%) no-repeat;
}

.mbsc-datepicker .mbsc-calendar-cell.mbsc-ltr.check-out,
.mbsc-datepicker .mbsc-calendar-cell.mbsc-rtl.check-in {
    border-color: #c75245;
}

.mbsc-datepicker .mbsc-calendar-cell.mbsc-windows.check-in,
.mbsc-datepicker .mbsc-calendar-cell.mbsc-windows.check-out {
    border-color: transparent;
}