body {
width: 100%;
height: 100%;
}
div {
  display: inline-block;
  height: 80%;
  position: relative;
  margin: -2px;
  vertical-align: top;
  overflow:auto;
}
#tree {
  width: 20%;
}
#table {
  width: 70%;
}

.pagination {
  display: inline-block;
}

.pagination a {
  color: black;
  float: left;
  padding: 8px 16px;
  text-decoration: none;
}

.pagination a.active {
  background-color: #4CAF50;
  color: white;
}

.pagination a:hover:not(.active) {background-color: #ddd;}