/* ==========================================================================
   Folder tree browser (/drive/tree).
   Owning feature: tree view
   Load order is defined in Views/Shared/_CssIncludes.cshtml — do not reorder.
   ========================================================================== */

/* ==========================================================================
   Folder tree browser (/drive/tree) — two-column sidebar tree + content table.
   Uses the site-wide --fh-* tokens (same palette, type, radii as Browse/Recent).
   ========================================================================== */
.fh-treeview {
  font-family: var(--fh-font-sans);
  color: var(--fh-text);
  display: flex;
  flex-direction: column;
  gap: var(--fh-section-gap, 1.25rem);
  width: 100%;
  min-width: 0;
}

/* The header reuses the app's canonical .fh-content-head structure — title
   cluster (icon + title + subtitle) on the left, .fh-toolbar actions on the
   right — exactly like Search/Recent/Trash, so spacing, typography and the
   responsive wrap are handled by layouts/content.css and pages/browse.css.
   Only the visibility hook that treeview.js toggles on [data-treeview-actions]
   is defined here. */
.fh-treeview-head {
  min-width: 0;
}
.fh-treeview-actions.is-hidden,
.fh-treeview-mutate-actions.is-hidden {
  display: none;
}

.fh-treeview-split {
  display: grid;
  grid-template-columns: minmax(230px, 320px) minmax(0, 1fr);
  gap: var(--fh-section-gap, 1.25rem);
  align-items: start;
}
@media (min-width: 1440px) and (max-width: 1919.98px) {
  .fh-treeview-split {
    grid-template-columns: minmax(240px, 22rem) minmax(0, 1fr);
  }
}
@media (min-width: 1920px) and (max-width: 2559.98px) {
  .fh-treeview-split {
    grid-template-columns: minmax(260px, 24rem) minmax(0, 1fr);
  }
}
@media (min-width: 2560px) and (max-width: 3839.98px) {
  .fh-treeview-split {
    grid-template-columns: minmax(280px, 28rem) minmax(0, 1fr);
  }
}
@media (min-width: 3840px) {
  .fh-treeview-split {
    grid-template-columns: minmax(300px, 32rem) minmax(0, 1fr);
  }
}
#treeview-page.is-expanded-all .fh-treeview-split {
  grid-template-columns: minmax(0, 1fr);
}
#treeview-page.is-expanded-all #treeview-content {
  display: none;
}
#treeview-page.is-expanded-all .fh-treeview-tree {
  max-height: calc(100dvh - 260px);
}

.fh-treeview-sidebar {
  container-type: inline-size;
  container-name: tree-sidebar;
  background: var(--fh-surface, #ffffff);
  border: 1px solid var(--fh-border);
  border-radius: var(--fh-radius-lg);
  box-shadow: var(--fh-shadow-sm);
  overflow: hidden;
}
.fh-treeview-search {
  position: relative;
  padding: 0.75rem;
  border-bottom: 1px solid var(--fh-border);
}
.fh-treeview-search-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.fh-treeview-search-field {
  position: relative;
  flex: 1;
  min-width: 0;
}
.fh-treeview-search-input {
  padding-left: 2.15rem;
}
.fh-treeview-search-icon {
  position: absolute;
  left: 0.7rem;
  top: 0;
  height: 100%;
  display: grid;
  place-items: center;
  color: var(--fh-muted);
  pointer-events: none;
  font-size: var(--fh-text-sm);
}
.fh-treeview-expand-btn {
  flex: 0 0 auto;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
}
.fh-treeview-expand-btn[aria-pressed="true"] {
  color: var(--fh-primary);
  border-color: var(--fh-primary-soft-border, #bfdbfe);
  background: var(--fh-primary-soft, #eff6ff);
}
@container tree-sidebar (max-width: 279.98px) {
  .fh-treeview-expand-label {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
}
.fh-treeview-tree-wrap {
  position: relative;
}
.fh-treeview-tree {
  padding: 0.625rem 0.625rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1px;
  max-height: calc(100dvh - 350px)!important;
  overflow: auto;
}
.fh-treeview-tree-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: var(--fh-text-sm);
  font-weight: var(--fh-weight-semibold);
  color: var(--fh-muted);
  background: rgba(255, 255, 255, 0.72);
  z-index: 2;
}
.fh-treeview-tree-loading i {
  color: var(--fh-primary);
}
.fh-treeview-node {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-top: 0.4rem;
  padding-bottom: 0.4rem;
  padding-right: 0.6rem;
  border-radius: var(--fh-radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  background: transparent;
  color: var(--fh-text);
  font-size: var(--fh-text-base);
  font-weight: var(--fh-weight-medium);
  transition: background-color var(--fh-transition-fast, 0.15s ease),
              color var(--fh-transition-fast, 0.15s ease),
              border-color var(--fh-transition-fast, 0.15s ease);
  user-select: none;
  outline: none;
}
.fh-treeview-node:hover {
  background-color: var(--fh-primary-soft, var(--fh-sidebar-hover, #eff6ff));
  color: var(--fh-primary);
}
.fh-treeview-node:focus-visible {
  border-color: var(--fh-primary);
  box-shadow: var(--fh-focus-ring);
}
.fh-treeview-node.is-selected {
  background-color: var(--fh-primary-soft, #eff6ff);
  border-color: var(--fh-primary-soft-border, #bfdbfe);
  color: var(--fh-primary-dark);
  font-weight: var(--fh-weight-semibold);
}
.fh-treeview-node.is-selected:hover {
  background-color: var(--fh-sidebar-hover, #eff6ff);
}
.fh-treeview-caret {
  width: 1rem;
  height: 1rem;
  flex: none;
  display: grid;
  place-items: center;
  color: var(--fh-muted);
  font-size: var(--fh-text-2xs);
  transform: rotate(0deg);
  transition: transform var(--fh-transition-fast, 0.15s ease);
}
.fh-treeview-caret.is-empty {
  color: transparent;
  pointer-events: none;
}
.fh-treeview-caret.is-open {
  transform: rotate(90deg);
}
.fh-treeview-folder-icon,
.fh-treeview-file-icon {
  width: 1.125rem;
  height: 1.125rem;
  flex: none;
  display: grid;
  place-items: center;
  font-size: var(--fh-text-base);
}
.fh-treeview-node-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}
.fh-treeview-node-count {
  font-size: var(--fh-text-xs);
  color: var(--fh-muted);
  flex: none;
  white-space: nowrap;
}
.fh-treeview-node.is-selected .fh-treeview-node-count {
  color: var(--fh-primary);
}

.fh-treeview-panel {
  background: var(--fh-surface, #ffffff);
  border: 1px solid var(--fh-border);
  border-radius: var(--fh-radius-lg);
  box-shadow: var(--fh-shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.fh-treeview-panel-head {
  padding: var(--fh-row-pad-y, 0.75rem) var(--fh-row-pad-x, 1rem);
  border-bottom: 1px solid var(--fh-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.fh-treeview-crumbs {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--fh-text-sm);
  color: var(--fh-muted);
  flex-wrap: wrap;
}
.fh-treeview-crumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.fh-treeview-crumb .is-current {
  color: var(--fh-text);
  font-weight: var(--fh-weight-semibold);
}
.fh-treeview-crumb-link {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}
.fh-treeview-crumb-link:hover {
  color: var(--fh-primary);
  text-decoration: underline;
}
.fh-treeview-crumb-sep {
  color: var(--fh-muted);
  opacity: 0.6;
}
.fh-treeview-summary {
  font-size: var(--fh-text-sm);
  color: var(--fh-muted);
  white-space: nowrap;
}

.fh-treeview-table-head,
.fh-treeview-row {
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(78px, 0.9fr) minmax(64px, 0.7fr) minmax(78px, 1fr) 36px;
  gap: 1rem;
  align-items: center;
  padding: var(--fh-row-pad-y, 0.75rem) var(--fh-row-pad-x, 1rem);
}
.fh-treeview-table-head {
  background: var(--fh-soft);
  border-bottom: 1px solid var(--fh-border);
  font-size: var(--fh-text-xs);
  font-weight: var(--fh-weight-bold);
  letter-spacing: var(--fh-tracking-wide);
  text-transform: uppercase;
  color: var(--fh-muted);
}
.fh-treeview-table-head .is-end,
.fh-treeview-row-size,
.fh-treeview-row-date {
  text-align: right;
}
.fh-treeview-row {
  border-bottom: 1px solid var(--fh-border);
  transition: background-color var(--fh-transition-fast, 0.15s ease);
}
.fh-treeview-row.is-folder,
.fh-treeview-row.is-file {
  cursor: pointer;
}
.fh-treeview-row:hover {
  background: var(--fh-hover, #f1f5f9);
}
.fh-treeview-row-name {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
}
.fh-treeview-row-icon {
  width: 1.5rem;
  flex: none;
  display: grid;
  place-items: center;
  font-size: var(--fh-text-lg);
  line-height: 1;
}
.fh-treeview-row-label {
  font-size: var(--fh-text-base);
  font-weight: var(--fh-weight-medium);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.fh-treeview-row-kind,
.fh-treeview-row-size,
.fh-treeview-row-date {
  font-size: var(--fh-text-sm);
  color: var(--fh-muted);
}
.fh-treeview-col-menu {
  width: 28px;
}
.fh-treeview-row-menu,
.fh-treeview-node-menu {
  position: relative;
  justify-self: end;
}
.fh-treeview-menu-toggle {
  width: 1.75rem;
  height: 1.75rem;
  border: 0;
  border-radius: var(--fh-radius-sm);
  background: transparent;
  color: var(--fh-muted);
  display: grid;
  place-items: center;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.12s, background 0.12s, color 0.12s;
}
.fh-treeview-row:hover .fh-treeview-menu-toggle,
.fh-treeview-node:hover .fh-treeview-menu-toggle,
.fh-treeview-menu-toggle[aria-expanded="true"] {
  opacity: 1;
}
.fh-treeview-menu-toggle:hover {
  background: var(--fh-hover, #f1f5f9);
  color: var(--fh-text);
}
.fh-treeview-node .fh-treeview-node-menu {
  margin-left: auto;
  flex: none;
}
.fh-treeview-rename-input {
  font: inherit;
  font-size: inherit;
  font-weight: inherit;
  color: inherit;
  width: 100%;
  min-width: 0;
  border: 1px solid var(--fh-primary);
  border-radius: var(--fh-radius-sm);
  padding: 0.125rem 0.375rem;
  background: var(--fh-surface, #fff);
  outline: none;
  box-shadow: var(--fh-focus-ring);
}

@media (max-width: 1023.98px) {
  .fh-treeview-table-head,
  .fh-treeview-row {
    grid-template-columns: minmax(0, 1fr) minmax(64px, 0.7fr) minmax(78px, 1fr) 36px;
  }
  .fh-treeview-col-kind,
  .fh-treeview-row-kind {
    display: none;
  }
}

@media (max-width: 767.98px) {
  .fh-treeview-split {
    grid-template-columns: 1fr;
  }
  .fh-treeview-tree {
    max-height: min(280px, calc(100dvh - 220px));
  }
  #treeview-page.is-expanded-all .fh-treeview-tree {
    max-height: calc(100dvh - 220px);
  }
  .fh-treeview-table-head,
  .fh-treeview-row {
    grid-template-columns: minmax(0, 1fr) 36px;
    gap: 0.5rem;
  }
  .fh-treeview-col-kind,
  .fh-treeview-row-kind,
  .fh-treeview-col-size,
  .fh-treeview-row-size,
  .fh-treeview-col-date,
  .fh-treeview-row-date {
    display: none;
  }
}