.ripple-effect {
  overflow: hidden;
}
.ripple-effect div {
  position: absolute;
  transform: translate(-50%, -50%);
  pointer-events: none;
  border-radius: 50rem;
  background-color: red;
  animation: rippleEffect 1s linear infinite;
}

@keyframes rippleEffect {
  from {
    width: 0;
    height: 0;
    opacity: 0.5;
  }
  to {
    width: 500px;
    height: 500px;
    opacity: 0;
  }
}

.testo-animato h5[data-split="heading"] .line { opacity:0; }