Stylized Bar Chart
This stylized bar chart displays the top 20 most populous countries, using horizontal bars ordered from largest to smallest. The visualization is built with React and D3 v5, using `scaleBand` for the y-axis and `scaleLinear` for the x-axis to map population values. Data comes from the United Nations World Population Prospects 2019, loaded via D3's `csv` function. The SVG rendering includes axes with custom tick formatting (converting values to billions) and a labeled x-axis, all styled with the Poppins font family.