Pure-Python HTML-to-PDF converter built on ReportLab, html5lib, and pypdf, supporting HTML5 and CSS 2.1 (with partial CSS3) without any external browser or native rendering engine dependency. Offers a choice of cairo or the legacy RenderPM graphics backend for bitmap/vector output. Being pure Python with no headless-browser dependency eases deployment in restricted environments, at the cost of less complete modern-CSS support.