message: Add border on tile elevation
diff: }
  &--elevation-1 {
  + border: 1px solid colors.stroke(extra-light);
  box-shadow: 0 0 12px 0 colors.elevation(1);
  }
  &--elevation-2 {
  + border: 1px solid colors.stroke(extra-light);
  box-shadow: 0 0 2px 0 colors.elevation('2x'),
  0 0 12px 0 colors.elevation('2y');
  }
  