This example shows a bar chart with four labeled bars (A through D) of varying lengths, rendered as SVG rectangles. The first bar is styled with red fill and a thick black stroke via a CSS class that overrides its inline blue fill, while the remaining bars alternate between blue and black fills. The visualization uses raw SVG elements within an HTML page, styled using CSS rules that set the font family, size, and bar appearance. No JavaScript libraries are used; the rendering relies entirely on static SVG markup and CSS properties.