/* ============================================================
   Menu system — editor sidebar shell + shared nav-item extras
   Works alongside .nav-item (library.css) and tree rows (app.css)
   ============================================================ */

/* Four-zone editor sidebar: header / actions / scroll body / footer */
.sidebar-shell {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--header-height));
  max-height: 100%;
  min-height: 0;
  overflow: hidden;
}

.sidebar-shell__header {
  flex: 0 0 auto;
  min-height: 64px;
  display: flex;
  align-items: center;
  padding: 8px 8px 6px;
  border-bottom: 1px solid var(--hairline);
}
.sidebar-shell__header .project-nav__mini { padding: 4px 6px; width: 100%; }

.sidebar-shell__actions {
  min-height: 34px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
}
.sidebar-shell__actions:empty { min-height: 8px; }

.sidebar-shell__body {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 6px 8px;
}

.sidebar-shell__footer {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-top: 1px solid var(--hairline);
  background: var(--panel-bg);
}

.stats-panel-header {
  flex: 0 0 auto;
}

/* nav-item additions for collapsible group rows */
.nav-item__label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ui-caret,
.nav-item__caret {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  color: var(--text-faint);
  transition: transform .14s ease;
  flex-shrink: 0;
}
.ui-caret--spacer,
.nav-item__caret--spacer { visibility: hidden; pointer-events: none; }
.ui-caret.is-collapsed,
.nav-item__caret.is-collapsed { transform: rotate(-90deg); }
.ui-caret--horizontal.is-collapsed { transform: rotate(0deg); }
.ui-caret--horizontal:not(.is-collapsed) { transform: rotate(180deg); }
.nav-item--group .nav-item__count { color: var(--text-faint); }
.nav-item--ancestor { color: var(--text); }
.nav-item--child {
  padding-left: calc(11px + var(--nav-level, 1) * 16px);
}
.nav-submenu {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item--toggle .nav-item__view-state {
  margin-left: auto;
  font-size: 11px;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}
.nav-item--view-off { opacity: 0.72; }
.nav-view-actions {
  display: flex;
  gap: 8px;
  padding: 4px 10px 8px 27px;
}
.nav-view-actions__btn {
  border: none;
  background: none;
  padding: 0;
  font: inherit;
  font-size: 12px;
  color: var(--accent);
  cursor: pointer;
}
.nav-view-actions__btn:hover { text-decoration: underline; }

.panel--left.is-collapsed .nav-item--toggle .nav-item__view-state,
.panel--left.is-collapsed .nav-view-actions {
  opacity: 0;
  max-width: 0;
  overflow: hidden;
}

/* Collapsed sidebar rail: keep icons, hide text/badges/counts/caret */
.panel--left.is-collapsed .sidebar-shell__header .project-nav__mini-text,
.panel--left.is-collapsed .nav-item__label,
.panel--left.is-collapsed .nav-item__count,
.panel--left.is-collapsed .nav-item__badge,
.panel--left.is-collapsed .nav-item__caret,
.panel--left.is-collapsed .ui-caret,
.panel--left.is-collapsed #sidebar-root .entity-row__label,
.panel--left.is-collapsed #sidebar-root .entity-row__subtitle,
.panel--left.is-collapsed #sidebar-root .entity-subtitle {
  opacity: 0;
  max-width: 0;
  min-width: 0;
  width: 0;
  margin: 0;
  padding: 0;
  flex: 0 0 0;
  overflow: hidden;
  white-space: nowrap;
  pointer-events: none;
  transition:
    opacity var(--panel-duration) var(--panel-ease),
    max-width var(--panel-duration) var(--panel-ease);
}
.panel--left.is-collapsed .sidebar-shell__body .nav-item {
  justify-content: center;
  gap: 0;
  padding-left: 11px !important;
  padding-right: 11px;
}