This line chart visualizes temperature data over time, using a line mark to represent temperature values on the y-axis against timestamps on the x-axis. Built with the Vega-Lite API (vl) and D3.js, the example loads CSV data from a remote URL via d3.csv, then renders the chart with configurable axis styling and an SVG renderer. Tooltips are enabled through the Vega tooltip handler, and the visualization auto-fits to the browser window size.