This line chart displays yearly sales summaries from a superstore dataset, plotting sales figures over time on a purple-themed SVG canvas. The implementation uses D3 v5’s `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and `line` generators to construct axes, gridlines, and a single emphasized line path. It loads data via `d3.csv` from a GitHub gist, parses years with `d3.timeParse`, and formats axis ticks with `format('.3s')`. Hover interactions are not present; the chart focuses on static visualization.