/* Modern Hierarchy Tree Styles - Inspired by VS Code */

/* Tree Container */
.tree-container {
    background-color: #ffffff;
    border-radius: 8px;
    padding: 0;
    overflow: hidden;
}

/* Tree Node */
.hierarchy-tree-node {
    position: relative;
    user-select: none;
}

/* Indentation based on depth */
.hierarchy-tree-node.depth-0 { padding-left: 8px; }
.hierarchy-tree-node.depth-1 { padding-left: 24px; }
.hierarchy-tree-node.depth-2 { padding-left: 40px; }
.hierarchy-tree-node.depth-3 { padding-left: 56px; }
.hierarchy-tree-node.depth-4 { padding-left: 72px; }
.hierarchy-tree-node.depth-5 { padding-left: 88px; }

/* Node Header (Folder Row) */
.hierarchy-node-header {
    display: flex;
    align-items: center;
    padding: 6px 12px 6px 8px;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.15s ease;
    margin: 2px 0;
    position: relative;
    background-color: transparent;
}

.hierarchy-node-header:hover {
    background-color: #f0f4f8;
}

.hierarchy-tree-node.expanded > .hierarchy-node-header {
    background-color: #e8f0fe;
    font-weight: 500;
}

/* Toggle Arrow */
.hierarchy-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    margin-right: 4px;
    flex-shrink: 0;
    transition: transform 0.2s ease;
    color: #5f6368;
}

.hierarchy-toggle svg {
    transition: transform 0.2s ease;
}

.hierarchy-tree-node:not(.expanded) .hierarchy-toggle svg {
    transform: rotate(0deg);
}

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

.hierarchy-toggle-empty {
    opacity: 0;
    pointer-events: none;
}

/* Loading Spinner for Tree Nodes */
.hierarchy-toggle .spinner-sm {
    width: 12px;
    height: 12px;
    border: 2px solid #e5e7eb;
    border-top-color: #0070f3;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Node Loading State */
.hierarchy-tree-node.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Folder Icon */
.hierarchy-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: 8px;
    flex-shrink: 0;
}

.hierarchy-icon-folder {
    color: #FDB022;
}

.hierarchy-tree-node.expanded .hierarchy-icon-folder {
    color: #F59E0B;
}

/* Label */
.hierarchy-label {
    flex: 1;
    font-size: 14px;
    font-weight: 500;
    color: #1f2937;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Document Count Badge */
.hierarchy-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    height: 18px;
    padding: 0 6px;
    margin-left: 8px;
    background-color: #e0e7ff;
    color: #4338ca;
    border-radius: 9px;
    font-size: 11px;
    font-weight: 600;
    line-height: 1;
}

/* Node Content (Collapsed by default) */
.hierarchy-node-content {
    display: none;
    padding-left: 24px;
}

.hierarchy-tree-node.expanded > .hierarchy-node-content {
    display: block;
}

/* Children Container */
.hierarchy-children {
    margin-top: 2px;
}

/* Document Row */
.hierarchy-document {
    position: relative;
    margin: 4px 0;
}

.hierarchy-document::before {
    content: '';
    position: absolute;
    left: -16px;
    top: 0;
    bottom: 0;
    width: 1px;
    background-color: #e5e7eb;
}

.hierarchy-document.last::before {
    bottom: 50%;
}

.hierarchy-document::after {
    content: '';
    position: absolute;
    left: -16px;
    top: 50%;
    width: 12px;
    height: 1px;
    background-color: #e5e7eb;
}

.hierarchy-doc-row {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    background-color: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    transition: all 0.15s ease;
    gap: 12px;
}

.hierarchy-doc-row:hover {
    background-color: #f9fafb;
    border-color: #0070f3;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    transform: translateY(-1px);
}

/* Document Icon */
.hierarchy-doc-icon {
    flex-shrink: 0;
    color: #6366f1;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Document Content */
.hierarchy-doc-content {
    flex: 1;
    min-width: 0;
}

.hierarchy-doc-name {
    font-size: 14px;
    font-weight: 600;
    color: #111827;
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.hierarchy-doc-details {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 12px;
    color: #6b7280;
}

.detail-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.detail-item svg {
    flex-shrink: 0;
    opacity: 0.6;
}

/* Document Actions */
.hierarchy-doc-actions {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
}

.hierarchy-action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    background-color: #ffffff;
    color: #6b7280;
    cursor: pointer;
    transition: all 0.15s ease;
}

.hierarchy-action-btn:hover {
    background-color: #0070f3;
    border-color: #0070f3;
    color: #ffffff;
    transform: scale(1.05);
}

.hierarchy-action-btn:active {
    transform: scale(0.95);
}

/* Empty State */
.tree-view .empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 64px 32px;
    text-align: center;
    color: #9ca3af;
}

.empty-state svg {
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h2 {
    font-size: 18px;
    font-weight: 600;
    color: #4b5563;
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 14px;
    color: #9ca3af;
}

/* Scrollbar Styling */
.tree-container::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.tree-container::-webkit-scrollbar-track {
    background-color: #f3f4f6;
    border-radius: 4px;
}

.tree-container::-webkit-scrollbar-thumb {
    background-color: #d1d5db;
    border-radius: 4px;
}

.tree-container::-webkit-scrollbar-thumb:hover {
    background-color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hierarchy-tree-node.depth-0 { padding-left: 4px; }
    .hierarchy-tree-node.depth-1 { padding-left: 16px; }
    .hierarchy-tree-node.depth-2 { padding-left: 28px; }
    .hierarchy-tree-node.depth-3 { padding-left: 40px; }
    .hierarchy-tree-node.depth-4 { padding-left: 52px; }

    .hierarchy-doc-details {
        flex-direction: column;
        gap: 4px;
    }

    .hierarchy-doc-row {
        padding: 8px;
    }

    .hierarchy-doc-name {
        font-size: 13px;
    }

    .hierarchy-doc-details {
        font-size: 11px;
    }
}

/* Print Styles */
@media print {
    .hierarchy-doc-actions {
        display: none !important;
    }

    .hierarchy-doc-row {
        border: 1px solid #000;
        box-shadow: none !important;
    }

    .hierarchy-doc-row:hover {
        transform: none !important;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    .hierarchy-node-header,
    .hierarchy-toggle svg,
    .hierarchy-doc-row,
    .hierarchy-action-btn {
        transition: none !important;
    }
}

/* Dark Mode Support (Optional) */
@media (prefers-color-scheme: dark) {
    .tree-container {
        background-color: #1e293b;
    }

    .hierarchy-node-header {
        color: #e2e8f0;
    }

    .hierarchy-node-header:hover {
        background-color: #334155;
    }

    .hierarchy-tree-node.expanded > .hierarchy-node-header {
        background-color: #475569;
    }

    .hierarchy-label {
        color: #f1f5f9;
    }

    .hierarchy-doc-row {
        background-color: #0f172a;
        border-color: #334155;
    }

    .hierarchy-doc-row:hover {
        background-color: #1e293b;
        border-color: #3b82f6;
    }

    .hierarchy-doc-name {
        color: #f1f5f9;
    }

    .hierarchy-doc-details {
        color: #94a3b8;
    }

    .hierarchy-action-btn {
        background-color: #0f172a;
        border-color: #334155;
        color: #94a3b8;
    }

    .hierarchy-action-btn:hover {
        background-color: #3b82f6;
        border-color: #3b82f6;
        color: #ffffff;
    }
}