This line chart visualizes temperature readings over the course of a week in San Francisco. The data comes from a CSV file loaded via `d3.csv`. The chart uses `d3.scaleTime` for the x-axis and `d3.scaleLinear` for the y-axis, with an SVG rendering. A smooth line is drawn using `d3.line` with `curveBasis`, and circles mark each data point. Axes are generated using `d3.axisBottom` and `d3.axisLeft`, with grid lines and custom styling.