Round the top edges of my tab bar

Ionic Framework
1

Hello,

I would like to know a solution to round the top left and top right edge of my tab bar.

Thank’s for help

Capture d’écran 2020-11-06 à 17.14.56
Capture d’écran 2020-11-06 à 17.14.56750×182 25.5 KB

2

Nobody for help ? Please ?

3 
ion-tab-bar  {
  background-color:black;
  border-top-left-radius: 15px;
  border-top-right-radius: 15px;
  border: unset;
}

ion-tab-button {
  margin-top: 5.3vw;
  background-color: black;
}

ion-tabs {
  background-color: white;
}

#tab-button-tab1 {
  border-top-left-radius: 15px;
}

#tab-button-tab4 {
  border-top-right-radius: 15px;
}