:root {
  --tree-scroll-size: 17px;
  --tree-scroll-track: var(--gray-12);
  --tree-scroll-thumb: var(--blue-2);
  --tree-scroll-hover: var(--gray-7);
  --tree-scroll-border: var(--gray-11);
}

/* Both visible axes are controls below; hide only their native counterparts. */
.tree-container {
  -ms-overflow-style: none;
  scrollbar-width: none;
  padding-inline-end: var(--tree-scroll-size);
  /* Keep keyboard focus and scroll-into-view targets clear of the floating budget and the bottom scrollbar. */
  scroll-padding-bottom: 112px;
}
.tree-container::-webkit-scrollbar { display: none; width: 0; height: 0; }

.tree-scroll-bar,
.tree-scroll-corner {
  position: fixed;
  z-index: 30;
  box-sizing: border-box;
  transform-origin: top left;
  background: var(--tree-scroll-track);
  border: 1px solid var(--tree-scroll-border);
}
.tree-scroll-bar {
  height: var(--tree-scroll-size);
  padding: 1px;
  display: flex;
  align-items: center;
}
.tree-scroll-bar.is-vertical {
  width: var(--tree-scroll-size);
  padding: 0;
}
.tree-scroll-corner {
  width: var(--tree-scroll-size);
  height: var(--tree-scroll-size);
}
.tree-scroll-bar[hidden],
.tree-scroll-corner[hidden] { display: none; }

.tree-scroll-range {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  min-width: 0;
  height: 12px;
  min-height: 12px;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: grab;
  touch-action: none;
  direction: ltr;
}
.tree-scroll-bar.is-vertical .tree-scroll-range {
  position: absolute;
  left: 50%;
  top: 50%;
  width: var(--tree-scroll-length);
  transform: translate(-50%, -50%) rotate(90deg);
}
.tree-scroll-range:active { cursor: grabbing; }
.tree-scroll-range:disabled { opacity: 0.45; cursor: default; }
.tree-scroll-range::-webkit-slider-runnable-track {
  height: 12px;
  border: 1px solid var(--tree-scroll-border);
  border-radius: 4px;
  background: var(--tree-scroll-track);
}
.tree-scroll-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 48px;
  height: 12px;
  margin-top: -1px;
  border: 2px solid var(--tree-scroll-track);
  border-radius: 4px;
  background: var(--tree-scroll-thumb);
  box-shadow: 0 0 0 1px var(--tree-scroll-hover);
}
.tree-scroll-range::-webkit-slider-thumb:hover { background: var(--tree-scroll-hover); }
.tree-scroll-range::-moz-range-track {
  height: 12px;
  border: 1px solid var(--tree-scroll-border);
  border-radius: 4px;
  background: var(--tree-scroll-track);
}
.tree-scroll-range::-moz-range-thumb {
  width: 48px;
  height: 12px;
  box-sizing: border-box;
  border: 2px solid var(--tree-scroll-track);
  border-radius: 4px;
  background: var(--tree-scroll-thumb);
  box-shadow: 0 0 0 1px var(--tree-scroll-hover);
}
.tree-scroll-range::-moz-range-thumb:hover { background: var(--tree-scroll-hover); }
.tree-scroll-range:focus-visible { outline: 2px solid var(--green-2); outline-offset: 1px; }