This example uses the Vega-Lite API to render a line chart of San Francisco weekly temperature data from a CSV file loaded via d3.csv. The visualization encodes timestamps on the x-axis and temperature on the y-axis, with a customized dark theme and larger axis labels for readability. The chart automatically resizes to fit the browser window and includes interactive tooltips via vega-tooltip. The code registers Vega-Lite with the API wrapper and uses the markLine specification to draw the single series.