What is the zoom mode in Safari on iPhone?

Question

css

What is the zoom mode in Safari on iPhone? When this mode is enabled, the layout of the site floats. When it is off, that is, in normal mode, everything is in order.
Why can this be?
Does Safari on Iphone support CSS values ​​- em, rem? I used em, rem for layout, maybe this is the problem? How then to translate correctly em, rem to px?

Answer 1

Hi bro, for zooming you change initial-scale=1 or work with

html {
  font-size: 16px;
  @media (max-width: 1280px) {
    font-size: 15px;
  }
}

I recommend using rem in place of pixels. need to watch send screenshots!