This example renders a blank SVG canvas using D3 v5, with a CSS-styled container that hides overflow and prepares for future line-based drawing. The code initializes an SVG element and selects it via `d3.select('svg')`, but the visualization itself is incomplete—no data or shapes are generated. The stylesheet defines a `.lines` class with black strokes and a teal path color, suggesting an intended network or graph layout, but no such elements are currently created in the markup or script.