If only there were a way to make consistent structure in an online document (such as hypertext) and separate the styling into distinct files. Even better, what

If only there were a way to make consistent structure in an online document (such as hypertext) and separate the styling into distinct files. Even better, what if we could make separate styling for mobile, desktop, and printing, all with the same content? If only it were possible using existing standard web technology. Sadly it was never designed with such goals in mind. /s