foo {
  color: blue;
}

foo--modifier {
  color: red;
}

foo {
  color: blue;
}
foo bar {
  color: red;
}

foo {
  color: blue;
}
bar foo {
  color: red;
}

foo {
  color: blue;
}
bar baz {
  color: red;
}

bar foo {
  color: red;
}
bar foo baz {
  color: blue;
}