.heart-wrapper {
  position: relative;
  width: 150px;
  height: 150px;
}

.heart {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-45deg);
  transform-origin: center center;
  animation: beat 1s infinite ease-in-out;
}

.heart-inner {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 80px;
  height: 80px;
  transform: translate(-50%, -50%);
  background-color: #ff3b3b;
  border-radius: 50% 50% 0 0;
  animation: beat-inner 1s infinite ease-in-out;
}

@keyframes beat {
  0% {
    transform: rotate(-45deg) scale(1);
  }
  50% {
    transform: rotate(-45deg) scale(1.2);
  }
  100% {
    transform: rotate(-45deg) scale(1);
  }
}

@keyframes beat-inner {
  0% {
    height: 80px;
  }
  50% {
    height: 100px;
  }
  100% {
    height: 80px;
  }
}