:host {
  display: inline-flex;
  width: 100%;
}

:host * {
  box-sizing: border-box;
}

/* Base item styles */
.tree-navigation-item {
  width: 100%;
  list-style: none;
  border-radius: var(--s-border-radius-base);
}

/* Link styles */
.tree-navigation-item__link {
  display: inline-flex;
  align-items: center;
  width: 100%;
  height: 3rem;
  padding: 0 var(--s-space-12) 0 var(--tree-nav-item-padding, var(--s-space-12));
  margin-bottom: var(--s-space-2);
  gap: calc(var(--s-space-4) - var(--s-space-2));
  min-width: 0;
  border: none;
  background-color: transparent;
  color: var(--s-text-default);
  cursor: pointer;
  text-decoration: none;
  font: inherit;
  font-size: var(--s-font-size-sm);
  font-weight: var(--tree-nav-item-label-weight, var(--s-font-weight-medium));
  line-height: var(--s-line-height-sm);
  border-radius: var(--s-border-radius-base);
}

/* Link states */
.tree-navigation-item__link:hover {
  background-color: var(--s-background-hovered);
}

.tree-navigation-item__link:active {
  background-color: var(--s-state-pressed);
}

.tree-navigation-item__link:focus {
  outline: none;
}

.tree-navigation-item__link:focus-visible .tree-navigation-item__label {
  border-radius: var(--s-border-radius-xs);
  box-shadow: 0 0 0 0.125rem var(--s-focus-default);
}

/* Active link styles */
.tree-navigation-item__link--active {
  background-color: var(--s-background-hovered);
  color: var(--s-text-highlight);
  --tree-nav-item-label-weight: var(--s-font-weight-medium);
}

.tree-navigation-item__link--active:hover {
  background-color: var(--s-state-pressed);
}

.tree-navigation-item__link--active:active {
  background-color: var(--s-state-pressed);
}

/* Layout components */
.tree-navigation-item--expanded {
  height: 100%;
}

.tree-navigation-item__content {
  display: flex;
  align-items: center;
  min-width: 0;
  flex: 1;
}

/* Icon styles */
.tree-navigation-item__icon {
  display: inline-flex;
  flex-shrink: 0;
  padding-right: var(--s-space-8);
}

.tree-navigation-item__toggle-icon {
  flex-shrink: 0;
  max-height: 1rem;
  color: var(--s-icon-default);
  margin-left: var(--s-space-4);
}

.tree-navigation-item__external-icon {
  max-height: 1rem;
  color: var(--s-icon-default);
  margin-left: var(--s-space-4);
}

/* Label styles */
.tree-navigation-item__label {
  display: flex;
  align-items: center;
  min-width: 0;
  flex: 1;
}

.tree-navigation-item__label-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tree-navigation-item__toggle-icon,
.tree-navigation-item__external-icon {
  flex: 0 0 auto;
  margin-left: var(--s-space-4);
}

/* Children container */
.tree-navigation-item__children {
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
  overflow: hidden;
  height: 0;
  transition: height 0.3s ease-out;
}

.tree-navigation-item__children > ::slotted(swirl-tree-navigation-item) {
  --tree-nav-item-padding: 2.25rem;
  --tree-nav-item-label-weight: var(--s-font-weight-normal);
}

.tree-navigation-item__children > ::slotted(*) {
  opacity: 1;
}

.tree-navigation-item__toggle-icon {
  transition: transform 0.3s ease;
}

.tree-navigation-item--expanded .tree-navigation-item__toggle-icon {
  transform: rotate(90deg);
}

.tree-navigation-item__is-new-tag {
  flex-shrink: 0;
}