@layer layer-alpha, layer-beta.one;
@layer foo{
foo{}
}
@layer bar{
bar{}
}
@media level-1 and level-2{
@layer bar{
bar{}
}
}
@layer baz{
baz{}
}
@layer foobar{
foobar{}
}
@layer foo-layered{
@layer foo {
  foo {}
}
}
content{}
