#btn-scroll-top {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 30px;
    z-index: 99;
    border: none;
    outline: 0.25rem ridge #052A71;
    background-color: #0B4A9E;
    color: white;
    padding: 0.75rem;
    border-radius: 4px;
  }
  
  #btn-scroll-top:hover {
    background-color:  #960019;
  }