/* File tree component */

.file-tree {
  display: block;
  background: var(--pre-bg);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.file-tree__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--surface-subtle);
  border-bottom: 1px solid var(--border-light);
  font-family: var(--mono-font);
  font-size: 0.8125rem;
}

.file-tree__breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

.file-tree__breadcrumbs::-webkit-scrollbar {
  display: none;
}

.file-tree__up-button,
.file-tree__action-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 4px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s ease, background-color 0.15s ease;
  flex-shrink: 0;
}

.file-tree__up-button:hover,
.file-tree__action-button:hover {
  color: var(--full-contrast);
  background: var(--border-light);
}

.file-tree__breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.file-tree__breadcrumb-item {
  color: var(--muted);
  text-decoration: none;
  border-radius: 3px;
  padding: 2px 4px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.file-tree__breadcrumb-item:hover {
  color: var(--accent);
  background: var(--inline-code-bg);
}

.file-tree__breadcrumb-item--current {
  color: var(--full-contrast);
  font-weight: 600;
  pointer-events: none;
}

.file-tree__breadcrumb-separator {
  color: var(--border);
  user-select: none;
}

.file-tree__content {
  max-height: 420px;
  overflow-y: auto;
  padding: 8px 6px;
}

.file-tree__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.file-tree__node {
  margin: 1px 0;
}

.file-tree__children {
  margin-left: 14px;
  padding-left: 6px;
  border-left: 1px dashed var(--border-light);
}

.file-tree__item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 8px;
  border-radius: 5px;
  font-size: 0.875rem;
  line-height: 1.4;
  color: var(--full-contrast);
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.12s ease;
}

.file-tree__item:hover {
  background: var(--border-light);
}

.file-tree__item--active {
  background: var(--inline-code-bg);
  color: var(--accent);
  font-weight: 500;
}

.file-tree__item--active .file-tree__name {
  color: var(--accent);
  font-weight: 600;
}

.file-tree__item--active .file-tree__icon--file {
  color: var(--accent);
}

.file-tree__chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  background: none;
  border: none;
  padding: 0;
  color: var(--muted);
  cursor: pointer;
  flex-shrink: 0;
}

.file-tree__chevron-icon {
  transition: transform 0.15s ease;
}

.file-tree__node[aria-expanded="true"] > .file-tree__item .file-tree__chevron-icon {
  transform: rotate(90deg);
}

.file-tree__chevron--empty {
  visibility: hidden;
  pointer-events: none;
}

.file-tree__indent-spacer {
  width: 16px;
  flex-shrink: 0;
}

.file-tree__icon {
  flex-shrink: 0;
}

.file-tree__icon--folder {
  color: var(--accent);
}

.file-tree__icon--file {
  color: var(--muted);
}

.file-tree__icon--disabled {
  color: var(--muted);
  opacity: 0.5;
}

.file-tree__name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-tree__item--disabled {
  color: var(--muted);
  opacity: 0.55;
  cursor: default;
}

.file-tree__item--disabled:hover {
  background: transparent;
}

.file-tree__spinner {
  width: 12px;
  height: 12px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: file-tree-spin 0.6s linear infinite;
  flex-shrink: 0;
}

@keyframes file-tree-spin {
  to {
    transform: rotate(360deg);
  }
}

.file-tree__empty {
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
}

.file-tree__empty-hint {
  padding: 4px 8px 4px 28px;
  font-size: 0.75rem;
  color: var(--muted);
  font-style: italic;
  list-style: none;
}

.file-tree__error {
  padding: 28px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.file-tree__error-icon {
  color: var(--red);
}

.file-tree__error-text {
  color: var(--red);
  font-size: 0.875rem;
}