gtk3/testsuite/css/parser/outline-offset.ref.css

a {
  outline-offset: initial;
}

b {
  outline-offset: inherit;
}

c {
  outline-offset: unset;
}

d {
  outline-offset: 0;
}

e {
  outline-offset: 10px;
}

f {
  outline-offset: -10px;
}