This example visualizes the structure of a CSV dataset containing study focus logs. It loads the data from a GitHub Gist and presents a summary card showing the file size, row count, and column count. Below the summary, a simple SVG bar chart represents the first ten rows of data, with horizontal bars and row labels. Built with React and D3 v7, the code uses `d3.csvParse` to parse the dataset and the D3 selection API with `.join` and `.attr` to construct and style the SVG elements directly in the browser.