This example demonstrates a minimal D3.js visualization setup using ES6 modules, loading D3 v5 from UNPKG and importing both local modules and D3 API functions. The code uses `import { select } from 'd3'` to update the text content of a message div, while also defining CSS styling and a regular expression. The visualization renders a simple text message centered on the page, showing how to structure a basic D3 project with separate files for marks, axes, and data loading. The example does not display any actual data or chart elements beyond the styled text output.