Majordome is a CSS boilerplate, containing a set of CSS declarations changing the default aspect of every HTML element to give it a nicer feel.
Short answer: if you're working on a project with a big interface, no. If it's the beginning of a side project, then yes
Majordome only gives your website a basic and responsive interface, but as it does not use any CSS class you can't do a mre complex interface ( using things like dropdown menus, etc. ).
This boilerplate is meant to be used at the start of a project, when you don't have the time to develop a little interface but you still want your website to not look too ugly
I don't recommend using it in prod ( it isn't even finished atm, and even when it will be finished I don't recommend using it at a professional level )
You can either install Majordome using the default theme or download the source and change some settings ( such as the primary color of the theme, the font, the size, etc. ) using SASS
Just download src/majordome.css and link it to your website
git clone the repo
Change the values inside src/scss/config.scss to tweak the settings or even change the code of main.scss if you want to change a lot of things
Compile using SASS