dakr mode

app.py

@@ -158,7 +158,8 @@ def create_hierarchical_view(graph: Dict[str, Any], root_id: int, max_depth: int
                 color=color,
                 title=f"Name: {name}\nYear: {node.get('year', 'N/A')}\nInstitution: {node.get('institution', 'N/A')}",
                 x=x_pos,
-                y=y_pos
+                y=y_pos,
+                font={"color": "white", "size": 12}
             )
             nodes_list.append(ag_node)
             
@@ -418,6 +419,7 @@ def main():
             nodes_list, edges_list = create_hierarchical_view(graph, root_id, depth_filter)
             
             if nodes_list:
+                # configure for better dark mode compatibility
                 config = Config(
                     width=800,
                     height=600,
@@ -426,7 +428,17 @@ def main():
                     hierarchical=True,
                     nodeHighlightBehavior=True,
                     highlightColor="#F7A7A6",
-                    collapsible=False
+                    collapsible=False,
+                    # dark mode friendly settings
+                    node={
+                        "font": {
+                            "color": "black",  # ensure text is always black for readability
+                            "size": 12,
+                            "face": "arial"
+                        },
+                        "borderWidth": 2,
+                        "borderWidthSelected": 3
+                    }
                 )
                 
                 agraph(nodes=nodes_list, edges=edges_list, config=config)