.field-validation-valid {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 80%;
    color: #28a745;
}

.field-validation-error {
    width: 100%;
    margin-top: 0.25rem;
    font-size: 80%;
    color: #dc3545;
}

.form-control:invalid, .form-control.is-invalid, .form-control.input-validation-error {
    border-color: #dc3545;
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23dc3545' viewBox='-2 -2 7 7'%3e%3cpath stroke='%23dc3545' d='M0 0l3 3m0-3L0 3'/%3e%3ccircle r='.5'/%3e%3ccircle cx='3' r='.5'/%3e%3ccircle cy='3' r='.5'/%3e%3ccircle cx='3' cy='3' r='.5'/%3e%3c/svg%3E");
    background-repeat: no-repeat;
    background-position: center right calc(0.375em + 0.1875rem);
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-control:invalid:focus, .form-control.is-invalid:focus, .form-control.input-validation-error:focus {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

textarea.form-control:invalid, textarea.form-control.is-invalid, textarea.form-control.input-validation-error {
    padding-right: calc(1.5em + 0.75rem);
    background-position: top calc(0.375em + 0.1875rem) right calc(0.375em + 0.1875rem);
}