.animacion-h3 {
    animation: agrandar-encoger 1s infinite;
  }
  
  @keyframes agrandar-encoger {
    0% {
      transform: scale(1);
    }
    50% {
      transform: scale(1.1);
    }
    100% {
      transform: scale(1);
    }
  }

  .parpadeo-h3 {
    animation: parpadeo .6s infinite;
  }
  
  @keyframes parpadeo {
    0% {
      opacity: 1;
    }
    50% {
      opacity: 0;
    }
    100% {
      opacity: 1;
    }
  }