css - calc() not working within media queries

Question

@media screen and (max-width: calc(2000px-1px)) { 
  .col { width: 200px; }
}

The value after subtraction should be 1999px, however it does not seem to be working. If I manually change it to 1999px it works fine, so I know it's not a problem with my CSS. Is calc not supported within media queries, or am I doing something wrong?

Answer 1

ANSWER WAS EDITED 13.02.2018:

Using calc in media queries is supported by the spec, but support was only implemented by browsers recently (February 2018). Currently, calc in media queries is supported by Safari Technology Preview 49+, Chrome 66+, and Firefox 59+. See MDN's calc() page for the most up-to-date information.