@keyframes fall {
  0% {
    transform: translateY(0);
    opacity: 1;
  }

  100% {
    transform: translateY(100vh);
    opacity: 0;
  }
}

.heart {
  position: fixed;
  color: red;
  font-size: 20px;
  top: -10px;
  z-index: 9999;
  pointer-events: none;
  animation: fall linear infinite;
}