.form-checkbox-input{position:relative}.form-checkbox-input:after{border:solid #fff;border-width:0 2px 2px 0;content:"";height:9px;inset:0;margin:auto;opacity:0;position:absolute;transform:rotate(45deg) translate(-.5px,-.5px);width:5px}.form-checkbox-input:checked:after{opacity:1}