This example demonstrates fundamental SVG shapes and CSS styling, showing how circles, ellipses, rects, and paths render in a 600x400 viewport. It uses the SVG `circle`, `ellipse`, `rect`, and `path` elements with attributes like `cx`, `cy`, `r`, `fill`, and `stroke`. A `<style>` block applies CSS transitions to circles and paths, making them animate on hover or active states, changing fill and stroke width over 5000ms. The markup is hand-written HTML with embedded SVG, rendered statically without JavaScript libraries or data sources.