{"version":"1.0","type":"rich","title":"Multi-Series Line + Combined (Bar+Line)","description":"This dashboard presents two charts built with D3.js v7 from a CSV sales dataset. The top visualization uses a multi-series line chart to track monthly trends for Sales and Profit. The bottom chart combines bars for Sales with an overlaid line for Profit Margin, providing a dual-axis view of volume versus efficiency. Data is parsed and aggregated by month using `d3.rollups` and `d3.timeParse`, with axes, grids, and scales configured via `d3.axisLeft`, `d3.axisBottom`, and `d3.scaleUtc`. Rendering uses SVG within a dark-themed HTML container.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/ae8d50547cc4457db80c3cf3efdb7cac?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}