.input-group > .datepicker-button {
    border-top-right-radius: 0 !important;
    border-bottom-right-radius: 0 !important;
    border-top-left-radius: 4px !important;
    border-bottom-left-radius: 4px !important;
    border-right-width: 0px !important;
    border-left: 1px solid #ccc !important;
}

.input-group .form-control:first-child {
    border-top-right-radius: 4px !important;
    border-bottom-right-radius: 4px !important;
    border-top-left-radius: 0px !important;
    border-bottom-left-radius: 0px !important;

}