This example shows a temperature area chart over time, with a filled region highlighting the variation in temperature across dates. The visualization uses an SVG rendered through D3 v7, with a time-scaled x-axis and a linear y-axis. It loads CSV data from a remote gist, parses dates and numeric values, and draws the area using `d3.area` with a steelblue fill. Axes are added via `d3.axisBottom` and `d3.axisLeft`, and the chart is sized within a fixed margin and viewport. The data source is a temperature dataset, and the rendering is fully SVG-based.