This area chart displays a synthetic time series from a CSV file, plotting daily values that rise and fall in a peak pattern. The visualization uses a steelblue line and semi-transparent fill to show the trend. Built with D3.js v7, it parses CSV data and uses `d3.scaleLinear` for axes, `d3.area` and `d3.line` for shapes, and renders to SVG. Axis labels are added via `d3.axisBottom` and `d3.axisLeft`.