Solved Where is the archive category css id field?

Hi i have to make changes on posts category pages but i can't have any access to put my css id name on the field like others pages.

 

I tried this but it don't have any effect on mobile... Did i make mistake?



@media (max-width: 980px) {
body.category .et_pb_posts .et_pb_post img, .custom_blog.et_pb_posts .et_overlay {
width: 45%;
float: left;
margin-right: 7px;
}
body.category .et_pb_posts h2.entry-title a {
font-size: 55%;

}
body.category .et_pb_posts p.post-meta {
font-size: 60%;
}
body.category .et_pb_posts .post-content p {
display: none;
}

body.category article {
margin-bottom: -25px;
margin-top: -20px;
}
body.category .entry-title {
line-height: 12px;
}

}