Description
What version of Tailwind CSS are you using?
v3.3.3
What build tool (or framework if it abstracts the build tool) are you using?
PostCSS 8.4.27
PostCSS Loader 6.2.1
Webpack 5.88.2
Also reproduced in Tailwind Play (see below)
What version of Node.js are you using?
16.13.0
What browser are you using?
Chrome
What operating system are you using?
Windows
Reproduction URL
https://play.tailwindcss.com/7lVcDok0HN
Describe your issue
Unfortunately, I come bearing a case where calc() value is not properly normalized in an arbitrary value:
[--foo:calc((704-320)/(1400-782))]
Which I then extrapolated to more cases to try to narrow down a pattern:
❌ w-[calc((7-32)/(1400-782))]
✅ [--foo:calc((7-3)/(1400-782))]
❌ [--foo:calc((7-32)/(1400-782))]
✅ [--foo:calc((70-3)/(1400-782))]
❌ [--foo:calc((70-32)/(1400-782))]
✅ [--foo:calc((704-3)/(1400-782))]
✅ [--foo:calc((704-320))]
❌ [--foo:calc((704-320)/1)]
❌ [--foo:calc((704-320)/(1400-782))]
For the classes marked with a cross (❌), there is no space around the subtraction operator (-) in the first set of parentheses in the generated CSS rule value, causing the calc() value to be invalid.