paoloci If I put in custom.css
em {
color: #000;
}
nothing change.
I want to modify the <em> in my articles
Quick way would be adding this to custom.css file if you wish to precisely target em tags in articles :
.item-page .content em{color:#000 !important;}
as !important directive added will ensure that the specific CSS rule-set will apply
Kindly ensure to clear your browser cache if changes dont reflect.