Hey.Cafe will use the render engine that was planned for NodeHost that generates UI elements and CSS ONLY as they are needed and in the mode needed (dark mode / light mode) and compiled on the fly
This means the main app will only be a few lines and will render and create all CSS rules and compile the page CSS once it knows if it's dark mode, or what elements are needed, and if an element is not rendered it can be asked for and then will be rendered if it's not been rendered already to lower memory usage.