Just something I came across when using the vite-rolldown integration which switched over to lightningcss from esbuild. I am currently getting warnings from lightningcss for the following css. Haven't deep dived into css land so excuse me when this is already known/not an issue.

@layer base {
  @property --radialprogress {
    syntax: "<percentage>";
    inherits: true;
    initial-value: 0%;
  }
}

playground