* {
  margin: 0;
  padding: 0;
}

.jstree {
  float: left;
}

.jstree .jstree-item {
  width: 200px;
  height: 30px;
  font-size: 16px;
  border: 1px solid gray;
  border-top: 0;
  list-style-type: none;
  padding-top: 10px;
  padding-left: 10px;
  font-style: normal;
  cursor: pointer;
  overflow: hidden;
}

.jstree .jstree-item:first-child {
  border: 1px solid gray;
}


.jstree .jstree-item a {
  text-decoration: none;
  color: black;
}

.jstree .jstree-item i.up::before{
  content: '+';
  font-style: normal;
  padding-right: 5px;
}

.jstree .jstree-item i.down::before{
  content: '-';
  font-style: normal;
  padding-right: 5px
}