.field-error-message {
  --_field-state: initial;
  color: var(--form-error-color);
  visibility: var(--_field-state, hidden);
}

:is(:user-invalid, [aria-invalid=true]) ~ .field-error-message,
.field-error-message:has(~ :user-invalid, [aria-invalid=true]),
.field:has(:user-invalid, [aria-invalid=true]) > .field-error-message {
  --_field-state: /* */;
}