This area chart visualizes temperature variations in San Francisco over a week, with time on the x-axis and temperature on the y-axis. The data comes from a CSV file loaded via `d3.csv`, and timestamps are parsed as dates. The chart uses D3 v5’s `scaleTime`, `scaleLinear`, and `area` generator with `curveBasis` to create a smooth filled path, rendered as SVG. Axes are drawn with `axisBottom` and `axisLeft`, styled with custom CSS classes for ticks and labels.