.form-control.is-invalid {
    border-color: #f44336 !important;
    padding-right: calc(1.4em + 2.12rem) !important;
    /* background-image: url(../img/cross.svg) !important; */
    background-repeat: no-repeat !important;
    background-position: center right calc(.35em + .53rem) !important;
    background-size: calc(.5em + 1rem) calc(.5em + 1rem) !important;
    transition: inherit !important;
}

.invalid-feedback {
    width: 100% !important;
    margin-top: 0.25rem !important;
    font-size: 80% !important;
    color: #f44336 !important;
}