corner-shape changes how rounded corners are drawn. With border-radius, you can get bevels, notches, scoops, or squircles without masking tricks.

.card {
  border-radius: 2rem;
  corner-shape: squircle;
}

.ticket {
  border-radius: 1rem;
  corner-shape: scoop;
}

It only has an effect when a radius exists. More info on MDN.