This line chart visualizes temperature readings over a week in San Francisco using a smooth basis curve. The chart uses D3 v5 APIs including `scaleTime`, `scaleLinear`, `axisLeft`, `axisBottom`, and `line` with `curveBasis` to render the SVG path. Grid lines are drawn via negative tick sizes, and axis labels are positioned with rotation. Data is loaded from a CSV file containing timestamps and temperature values, with circles styled red and semi-transparent in CSS.