bulma-switch.min.css has sass variables

[epaprat]

Hello,

when i try to use dist/bulma-switch.min.css, i encounter following error.

> vue-cli-service build


 ERROR  Error: CSS minification error: Lexical error on line 1: Unrecognized text.

  Erroneous area:
1: $switch-height - ($switch-paddle-offset * 2)
^..^. File: css/chunk-vendors.b8dce9bf.css
Error: CSS minification error: Lexical error on line 1: Unrecognized text.

  Erroneous area:
1: $switch-height - ($switch-paddle-offset * 2)
^..^. File: css/chunk-vendors.b8dce9bf.css

if i review the css it contains this variables at several places.