/*
FNXC:Navigation 2026-06-19-00:00:
The experimental sidebar is a persistent desktop/tablet navigation replacement for the Header view-toggle row. It uses the same tokenized visual rhythm as Header navigation so the flag can be toggled without changing dashboard information architecture.
*/
.left-sidebar-nav {
  --left-sidebar-nav-width: calc(var(--space-2xl) * 7);
  --left-sidebar-nav-rail-width: calc(var(--space-2xl) * 2);
  position: relative;
  display: flex;
  flex-direction: column;
  width: var(--left-sidebar-nav-width);
  min-width: var(--left-sidebar-nav-width);
  min-height: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  color: var(--text);
}

.left-sidebar-nav__brand {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-sm);
  padding: var(--space-md);
  border-bottom: 1px solid var(--border);
  min-height: calc(var(--space-2xl) + var(--space-xl));
}

.left-sidebar-nav__collapse-toggle {
  flex-shrink: 0;
}

.left-sidebar-nav__list {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: var(--space-sm);
  min-height: 0;
  overflow-y: auto;
  padding: var(--space-sm);
}

.left-sidebar-nav__section {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.left-sidebar-nav__section--secondary {
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border);
}

.left-sidebar-nav__item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  min-height: calc(var(--space-xl) + var(--space-sm));
  padding: 0 var(--space-sm);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.left-sidebar-nav__item:hover,
.left-sidebar-nav__item:focus-visible {
  background: var(--card);
  color: var(--text);
  outline: none;
}

.left-sidebar-nav__item:focus-visible {
  box-shadow: var(--focus-ring);
}

.left-sidebar-nav__item--active {
  background: var(--todo-bg);
  color: var(--todo);
}

.left-sidebar-nav__icon-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: currentColor;
}

.left-sidebar-nav__dot {
  position: absolute;
  top: calc(var(--space-xs) * -1);
  right: calc(var(--space-xs) * -1);
}

.left-sidebar-nav__label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.left-sidebar-nav__badge {
  position: static;
  flex-shrink: 0;
}

.left-sidebar-nav__footer {
  margin-top: auto;
  padding: var(--space-sm);
  border-top: 1px solid var(--border);
}

.left-sidebar-nav__settings {
  justify-content: flex-start;
}

.left-sidebar-nav__resize-handle {
  position: absolute;
  top: 0;
  right: calc(var(--space-xs) * -1 / 2);
  bottom: 0;
  width: var(--space-xs);
  cursor: col-resize;
  touch-action: none;
  z-index: 1;
}

.left-sidebar-nav__resize-handle::after {
  content: "";
  position: absolute;
  top: 0;
  right: calc(var(--space-xs) / 2);
  bottom: 0;
  width: 1px;
  background: transparent;
  transition: background var(--transition-fast);
}

.left-sidebar-nav__resize-handle:hover::after,
.left-sidebar-nav__resize-handle:focus-visible::after {
  background: var(--todo);
}

.left-sidebar-nav__resize-handle:focus-visible {
  outline: none;
}

.left-sidebar-nav--collapsed {
  width: var(--left-sidebar-nav-rail-width);
  min-width: var(--left-sidebar-nav-rail-width);
}

.left-sidebar-nav--collapsed .left-sidebar-nav__label,
.left-sidebar-nav--collapsed .left-sidebar-nav__badge {
  display: none;
}

.left-sidebar-nav--collapsed .left-sidebar-nav__brand,
.left-sidebar-nav--collapsed .left-sidebar-nav__item {
  justify-content: center;
  padding-right: 0;
  padding-left: 0;
}

.left-sidebar-nav--collapsed .left-sidebar-nav__collapse-toggle {
  width: auto;
}

@media (max-width: 768px) {
  .left-sidebar-nav {
    display: none;
  }
}