How to modify :host --inner-border-width on ion-tab-button

[locutussky]

I have tried

ion-tab-button{
–inner-border-width: 0 0 0 0;
}

and

:host{
–inner-border-width: 0px 0px 0px 0px;
}

and

ion-tab-button::part(native) {
–inner-border-width: 0 0 0 0;

    }

None of them work

can anyone help me thank you