This stylised line chart displays temperature over time for a week in San Francisco, with a smooth natural curve connecting circular data points. Built with React and D3 v5, it uses `scaleTime` and `scaleLinear` to map the CSV data, while `line` with `curveNatural` creates the curved path. SVG renders the axes, gridlines, and color-coded marks, with native `<title>` elements providing hover tooltips formatted via `timeFormat`.