This example displays a summary of the contents of a CSV file, showing the file size, row count, and column count on a styled webpage with a blue gradient background. The page uses a D3.js v7 `d3.csv` promise to load and parse the data, while the Fetch API's `response.blob()` method is used to estimate file size. The retrieved statistics are then inserted into the DOM via `innerHTML` within a styled summary box that scales on hover.