.btn-shine {
    position: relative;
    background: linear-gradient(to right, #f44336 0, #ffeb3b 10%, #fff 20%);
    background-position: 0;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shine 3s infinite linear;
    font-weight: bold;
  }

  @-webkit-keyframes shine {
    0% {
      background-position: 0;
    }
    60% {
      background-position: 180px;
    }
    100% {
      background-position: 180px;
    }
  }

  @keyframes shine {
    0% {
      background-position: 0;
    }
    60% {
      background-position: 180px;
    }
    100% {
      background-position: 180px;
    }
  }