This area chart visualizes the average monthly screen time from a digital usage dataset. Using D3.js v7, the example groups daily records by month, calculates mean hours, and renders a smooth area with axes, gridlines, and interactive tooltips. Data is loaded as CSV from a GitHub gist, with dates parsed and scales computed via `d3.scaleTime` and `d3.scaleLinear`. The SVG output includes rotated month labels and labeled axes for clarity.