#scrollToTopBtn {
    position: fixed;
    right: 10px;
    bottom: 30px;
    z-index: 9;
    font-size: 16px;
    outline: none;
    background-color: #000;
    color: #fff;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
  }
  #scrollToTopBtn:hover {
    background-color: var(--color-3);
    color: #fff;
  }