safaehAnchoredLift function
Gap the card rises into after the funnel settles on the button.
Implementation
double safaehAnchoredLift(double progress) {
final t = ((progress - 0.48) / (_liftEnd - 0.48)).clamp(0.0, 1.0);
return _aboveGap * Curves.easeOut.transform(t);
}