This area chart visualizes a week of temperature readings in San Francisco, with time on the x-axis and temperature on the y-axis. The chart uses a smooth, curved path filled in maroon to represent the temperature trend. Built with D3 v5, the visualization loads CSV data from a remote URL, parses timestamps and numeric values, and renders an SVG using `d3.area` with `curveBasis`. Axes are created via `d3.axisBottom` and `d3.axisLeft`, with grid lines and labeled titles, all styled through external CSS.