This example displays a basic two-circle Venn diagram with overlapping regions, rendered as SVG. The code uses standard SVG elements—`<circle>`, `<rect>`, and `<text>`—to draw the diagram, with a thick black border and a title. One circle has a CSS transition and hover effect that changes its fill color to blue. The layout is static, with no JavaScript libraries; it relies on hardcoded coordinates and SVG attributes for positioning.