svg fundamentals
This example demonstrates the foundational structure of an SVG-based data visualization, presenting a blank canvas defined by a minimal HTML page. It shows how a visualization is scaffolded using raw HTML and CSS, with JavaScript reserved for future interactivity. The code relies on inline `<style>` tags and the standard SVG element hierarchy within an `index.html` file. This serves as a starting point for building more complex graphical charts and plots, illustrating the basic setup required before any data encoding or rendering logic is applied.