none or presentation?

Do either work across browsers and Screen Readers?

Details on Use of role=presentation or role=none

Short answer is:

All modern browsers support both role="none"...

So the design calls for a separator between options in a <select> menu.

How hard could that be?

The fake <option> approach

This is what you usually see on StackOverflow:

  <!-- This...

We often create games at work which need a fixed aspect ratio, to suit the art style and game mechanics.

TLDR; set the max-width to a viewport height unit

You can fill a screen relatively easily....