.checky{vertical-align:-.2rem;position:absolute;top:4px}.checky__checker{display:inline-block;border:1px solid var(--pen);height:20px;width:20px;border-radius:3px;box-sizing:border-box;}.checky__checker::before{content:'';opacity:0;position:absolute;top:3px;left:3px;background-color:var(--pen);width:14px;height:14px;border-radius:3px;transition:opacity .25s;}:checked + .checky__checker::before{opacity:1;}