.form-control {
    border-radius: 0;
    border: 0px 1px 0px 0px solid #ced4da;
}

.form-control:focus {
    border-color: #ced4da;
    box-shadow: none;
}

.was-validated .form-control:invalid {
    border-color: #dc3545;
    box-shadow: none;
}

.was-validated .form-control:valid {
    border-color: #28a745;
    box-shadow: none;
}