This line chart visualizes temperature readings in San Francisco over time, using a green area fill beneath the curve to emphasize the data range. The chart is rendered with D3 v5 in an SVG, employing `d3.scaleTime`, `d3.scaleLinear`, `d3.axisBottom`, `d3.axisLeft`, and `d3.area` with a basis curve. The data is loaded from a CSV file containing timestamp-temperature pairs, with axes labeled and grid lines styled via CSS.