/* Tree View — ПравоАгент */
/* File explorer / case tree navigation */

.tree {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: var(--font-size-sm);
}

.tree-item {
    position: relative;
}

.tree-item-content {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 3px var(--space-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    user-select: none;
}

.tree-item-content:hover {
    color: var(--color-text);
    background: var(--color-bg-hover);
}

.tree-item-content.active,
.tree-item-content.tree-selected {
    color: var(--color-text);
    background: rgba(140, 38, 234, 0.15);
}

.tree-item-content.drag-over {
    background: rgba(140, 38, 234, 0.2);
    outline: 1px dashed var(--color-primary);
}

.tree-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    color: var(--color-text-muted);
    transition: transform var(--transition-fast);
    cursor: pointer;
    font-size: 10px;
}

.tree-toggle.expanded {
    transform: rotate(90deg);
}

.tree-toggle-hidden {
    visibility: hidden;
}

.tree-icon {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 14px;
}

.tree-label {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tree-children {
    list-style: none;
    padding: 0;
    margin: 0;
    padding-left: 20px;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.tree-children.collapsed {
    max-height: 0;
}

/* Tree item meta (badge, count) */
.tree-meta {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    margin-left: auto;
    flex-shrink: 0;
}

.tree-item-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.tree-item-content:hover .tree-item-actions {
    opacity: 1;
}

.tree-action {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 3px;
    font-size: 10px;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    background: none;
}

.tree-action:hover {
    color: var(--color-text);
    background: var(--color-bg-hover);
}

/* Indentation levels */
.tree-indent-1 { padding-left: 20px; }
.tree-indent-2 { padding-left: 40px; }
.tree-indent-3 { padding-left: 60px; }
.tree-indent-4 { padding-left: 80px; }

/* Drop indicator (for drag & drop) */
.tree-drop-indicator {
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    pointer-events: none;
}

.tree-drop-indicator.before {
    top: -1px;
}

.tree-drop-indicator.after {
    bottom: -1px;
}

/* Empty tree */
.tree-empty {
    padding: var(--space-md);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* Tree file icons (colored) */
.tree-icon-folder {
    color: var(--color-warning);
}

.tree-icon-file {
    color: var(--color-text-muted);
}

.tree-icon-document {
    color: var(--color-primary-light);
}

.tree-icon-case {
    color: var(--color-info);
}

/* Active tree item with left border */
.tree-item-content.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 2px;
    bottom: 2px;
    width: 2px;
    background: var(--color-primary);
    border-radius: 0 2px 2px 0;
}

.tree-item-content.active {
    position: relative;
}

/* Filtered tree — dimmed items */
.tree-item.filtered-out > .tree-item-content {
    opacity: 0.3;
    pointer-events: none;
}

/* Scrollable tree */
.tree-scrollable {
    max-height: 100%;
    overflow-y: auto;
}