Different font size website/mobile/tablet?

Question

css

There was a question here:
how to make the font in the mobile version of the site different in size from the site on the computer?
The site is not responsive, this feature is disabled. It's been a question for a week now

Answer 1

Use

<meta name=viewport content="width=device-width, initial-scale=1">

. Why increase the font size?

Answer 2

on what basis do you want to determine the tablet is a mobile phone or a computer?
screen size or OS?

Answer 3

@media only screen and (max-width: 767px) {
  .class {font-size:10000px}
}