This area chart visualizes temperature readings in San Francisco over time, using a smooth curved path filled with maroon to highlight the trend. The visualization relies on D3 v6 APIs including `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and `area` with `curveBasis` to generate the SVG path. Data is loaded from a CSV file via `csv()`, with timestamps parsed as dates and temperatures as numbers. Grid lines extend across the chart, and axis labels and a title are rendered as SVG text elements.