This line chart displays a week of temperature data in San Francisco, with time on the x-axis and temperature on the y-axis. The visualization uses D3 v6 APIs including `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and `line` with `curveBasis` to render a smooth maroon path over a grid. The data is loaded from a CSV file via `csv()`, and the SVG output includes axis labels and a title, styled with custom CSS for fonts and tick marks.