/*[ BACK TO TOP ]
///////////////////////////////////////////////////////////
*/
.btn-back-to-top {
    display: none;
    position: fixed;
    width: 40px;
    height: 40px;
    bottom: 40px;
    right: 40px;
    background-color: black;
    opacity: 0.5;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    border-radius: 4px;
    transition: all 0.4s;
    -webkit-transition: all 0.4s;
    -o-transition: all 0.4s;
    -moz-transition: all 0.4s;
  }
  
  .symbol-btn-back-to-top {
    font-size: 22px;
    color: white;
    line-height: 1em;
  }
  
  .btn-back-to-top:hover {
    opacity: 1;
    cursor: pointer;
  }
  
  @media (max-width: 576px) {
    .btn-back-to-top {
      bottom: 15px;
      right: 15px;
    }
  }