min-device-pixel-ratio/device-pixel-ratio do not exist.

For the records,

• Standard min-resolution has been supported since Firefox 16 released 08/2012, Opera 12.1 released 11/2012, Chromium 29 released 07/2013, and Edge 12 released 07/2015
• Safari 15.8 released 07/2022 still requires -webkit-min-device-pixel-ratio
• Non-standard min--moz-device-pixel-ratio syntax was supported from Firefox 4 to Firefox 15 according to https://developer.mozilla.org/en-US/docs/Web/CSS/@media/-moz-device-pixel-ratio

• Run /bin/celerity sprites, check that icons on http://phorge.localhost/auth/config/new/ still render.
• Read CSS docs; probably install ancient browser versions if you don't trust documentation.