Specific browser css code

//Sepecific browser css code write
//For more information: https://browserstrangeness.github.io/css_hacks.html
@-moz-document url-prefix() {
 .nav-items li > ul { css code here }
}

@supports (-ms-ime-align:auto) and (font-variation-settings:normal) {
 .nav-items li > ul { css code here }
}