css-00

/* c */

@import "s";
@import 's';

@annotation {}
@body {}
@character-variant {}
@charset {}
@counter-style {}
@css {}
@document {}
@font-face {}
@font-feature-values {}
@keyframes {}
@media {}
@namespace {}
@ornaments {}
@page {}
@styleset {}
@stylistic {}
@supports {}
@swash {}
@viewport {}

@media and not only (>=) {}
@supports (display: flex) {}
@document url(s) {}
@document url('s') {}
@document url("s") {}

* ~ b #c .c
:root ::before
[a=s]
[a="s"]
[a='s']
:has() {
  --v: var(--v, none);
  -moz-any: red;
  color: "red";
  color: #c0ffee;
  color: calc(1px + 2%);
  color: linear-gradient(to red);
  color: !important;
}