@keyframes heartbeat {
      0% {
        font-size: 60px;
      }
      50% {
        font-size: 100px;
      }
      100% {
        font-size: 60px;
        opacity: 0;
      }
    }

    #heartbeat-svg {
      
      font-size: 60px;
      animation: heartbeat 1s;
      animation-iteration-count: 1;
      animation-fill-mode: forwards;
      color: red;
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
      z-index: 10000;

    }

    .list, .list-menu {
      
      position: relative;
      
    }