I absolutely don't recommend this template if u are looking for "high-performance" CSS.
This template is a combination of angular material, bootstrap, and custom styles, and they are all in main styles, so when u boot this style with a universal engine u will be confused because the render time on SSR is nearly 5-6 seconds (without any logic)
P.s. all components are in the main bundle module, so u will spend time creating modules and routers for each)