This area chart displays temperature readings in San Francisco over time, using a filled maroon curve against a clean grid. The data comes from a CSV file loaded via `d3.csv` from VizHub’s dataset repository. The visualization uses `d3.scaleTime` and `d3.scaleLinear` for axes, with `d3.area` and `curveBasis` to generate the smooth filled path. Axes are rendered as SVG elements with `d3.axisBottom` and `d3.axisLeft`, including tick lines and labels.