This example demonstrates how SVG shapes and CSS styling can create a visual composition of geometric forms. The page renders an empty SVG canvas that fills the viewport, with CSS classes defining stroke properties for line elements. The `.lines` class applies black strokes with a width of 10 pixels, while `.lines path` elements receive a teal color, rounded line joins, and rounded line caps. The code uses raw SVG markup with linked CSS stylesheets, showing how presentation attributes can be controlled entirely through stylesheet rules rather than inline SVG attributes.