This example uses D3 v5 and SVG to create a simple interactive canvas with a red background, as defined by an inline SVG style attribute. The visualization demonstrates how D3 can select and manipulate SVG elements, specifically by setting the SVG's background color via `d3.select('svg').style('background', 'red')`. The page layout is controlled through CSS, which removes margins and hides overflow for a full-viewport display. The code is minimal, focusing on the integration of D3 with SVG and CSS styling without any data binding or complex charting.