.btn-up, .btn-down {
  width: 44px;
  height: 44px;
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
}

.btn-up i, .btn-down i {
  line-height: 1 !important;
  vertical-align: middle !important;
}

.list-group-item:first-child .btn-up {
  visibility: hidden;
  pointer-events: none;
}

.list-group-item:last-child .btn-down {
  visibility: hidden;
  pointer-events: none;
}