Line Chart with Multiple Lines
This line chart displays multiple time series from the Olympic dataset, with each line representing a different country or category. The visualization uses D3 v5’s `d3.line` and `d3.scaleTime` generators to map CSV data to SVG paths, while axes are rendered via `d3.axisBottom` and `d3.axisLeft`. React manages the component lifecycle, and the SVG output is styled with external CSS. The chart focuses on comparing trends across series, with each line distinguished by color and label.