pragma-treeview {
  position: relative;
  width: 100%;
  height: 100%;
  display: block;
}
pragma-treeview ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
pragma-treeview .toolbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2rem;
  display: flex;
  align-items: center;
}
pragma-treeview .toolbar input[type=checkbox] {
  display: block;
  width: 1.5rem;
  height: 1.5rem;
}
pragma-treeview .toolbar button {
  display: block;
  width: 1.5rem;
  height: 1.5rem;
}
pragma-treeview .body {
  position: absolute;
  top: 2rem;
  left: 0;
  right: 0;
  bottom: 0;
  background: whitesmoke;
}
pragma-treeview ul[role=tree] {
  width: 100%;
  height: 100%;
  transform: translateZ(0);
  overflow: scroll;
  -webkit-overflow-scrolling: touch;
}
pragma-treeview li {
  cursor: pointer;
  line-height: 1.5rem;
  padding-left: 2rem;
  user-select: none;
  -moz-user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
  white-space: nowrap;
}
pragma-treeview li:before {
  content: "";
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 16px solid var(--c-accent);
  position: absolute;
  will-change: transform;
  transform: translate(-1.2rem, 0.2rem) rotate(90deg);
  transition: all 0.5s ease-out;
}
pragma-treeview li[aria-expanded=true]:before {
  transform: translate(-1.2rem, 0.2rem) rotate(180deg);
}
pragma-treeview [aria-hidden=true] {
  display: none;
}
pragma-treeview [aria-hidden=false] {
  display: block;
}
pragma-treeview [aria-selected=true]::before {
  content: "";
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  z-index: -1;
  height: 1.5rem;
  background: skyblue;
}
pragma-treeview span {
  display: inline-block;
}

.treeViewItem {
  pointer-events: none;
}