#heart-btn {
  transition: all 0.3s ease;
}

#heart-btn.clicked {
  background-color: #00aff0;
  border-color: #00aff0;
}

#heart-btn.clicked i {
  color: white;
}

.heart-fly {
  animation: fly-up 1s forwards;
}

@keyframes fly-up {
  0% {
    transform: translateY(0);
    opacity: 1;
  }
  100% {
    transform: translateY(-50px);
    opacity: 0;
  }
}