._wp_headless_menu_editor {

    div {
        box-sizing: border-box;
    }

    .button {
        height: auto;
    }

    label {
        box-sizing: border-box;

        &:before {
            box-sizing: border-box;
        }
    }

    ul {
        margin: 0;
        padding: 0;
    }
}