/*
 * TreeGrid
 *
 * Drawn by table.css — the container, density, header, row rules, hover and
 * selected tint all come from `.ion-table`, so a tree grid beside a table
 * reads as the same thing. This file adds only what the tree needs:
 *
 *   indent    level x spacing/20 before the first column's content, from
 *             `--ion-tree-grid-level`, set on the cell
 *   toggle    Table's 24px expander, turned 90deg when the row is open
 *   spacer    the same 24px on a leaf, so every label at a level lines up
 *   focus     the row, or the one cell, that has the grid's focus
 */
.ion-tree-grid__tree-cell {
  --ion-tree-grid-level: 0;
  --ion-tree-grid-indent: var(--spacing-20);
}

.ion-tree-grid__tree {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-4);
  padding-inline-start: calc(
    var(--ion-tree-grid-level) * var(--ion-tree-grid-indent)
  );
}

.ion-tree-grid__toggle,
.ion-tree-grid__spacer {
  display: inline-flex;
  flex: none;
  align-items: center;
  justify-content: center;
  width: var(--spacing-24);
  height: var(--spacing-24);

  /* Centred on the label's first line. */
  margin-block: calc((var(--type-body-sm-line-height) - var(--spacing-24)) / 2);
}

.ion-tree-grid__toggle {
  margin-inline: 0;
  padding: 0;
  border: 0;
  border-radius: var(--radius-xs);
  background: none;
  color: var(--icon-secondary);
  cursor: pointer;
}

.ion-tree-grid__toggle svg {
  width: var(--icon-size-sm);
  height: var(--icon-size-sm);
  transition: transform var(--ion-duration-base) var(--ion-ease-out);
}

/*
 * Closed points the reading direction; open points down. Right-to-left turns
 * it half round rather than mirroring it, so opening animates 180° to 90°.
 */
.ion-tree-grid__toggle--expanded svg {
  transform: rotate(90deg);
}

.ion-tree-grid__toggle:dir(rtl):not(.ion-tree-grid__toggle--expanded) svg {
  transform: rotate(180deg);
}

@media (hover: hover) {
  .ion-tree-grid__toggle:hover {
    background-color: var(--surface-hover);
    color: var(--icon-default);
  }
}

/*
 * Wrapped between words only. `anywhere` let a narrow table shrink the name
 * column to one letter a line while the figures kept their width; a word is
 * as narrow as it goes, and past that the table's region scrolls sideways.
 */
.ion-tree-grid__label {
  min-width: 0;
  overflow-wrap: break-word;
}

/*
 * The select cell is a control, not content: as narrow as its box. Its
 * header cell is Table's `.ion-table__select` as well.
 */
.ion-table th.ion-tree-grid__select,
.ion-table td.ion-tree-grid__select {
  width: 1%;
  padding-inline-end: 0;
}

.ion-tree-grid__select > span {
  display: inline-flex;
  vertical-align: middle;
}

/*
 * Focus is drawn inside the row or cell: a table's rows sit edge to edge,
 * and an outline outside one would be cut by its neighbour.
 */
.ion-tree-grid :is(tr, th, td) {
  outline: none;
}

.ion-tree-grid tr[data-focus-visible='true'],
.ion-tree-grid th[data-focus-visible='true'],
.ion-tree-grid td[data-focus-visible='true'] {
  outline: var(--border-width-thick) solid var(--border-focus);
  outline-offset: calc(-1 * var(--border-width-thick));
}

.ion-tree-grid__empty {
  text-align: center;
}

/*
 * Forced colours paint a selected row Highlight and keep its own colours
 * (index.css). On that fill the focus ring — blue on blue — and the grey
 * chevron were gone; both take the row's text colour.
 */
@media (forced-colors: active) {
  .ion-tree-grid tr[data-selected='true'][data-focus-visible='true'],
  .ion-tree-grid tr[data-selected='true'] [data-focus-visible='true'] {
    outline-color: HighlightText;
  }

  .ion-tree-grid tr[data-selected='true'] .ion-tree-grid__toggle {
    color: HighlightText;
  }
}