I made a new CSS

Hi!
Ive made a new and simple css that changes if it is mobile.
This css works without thumb.

I just want to ask a little question.
How can I include the post category like here :

https://astrologianapratica.wordpress.com/2015/06/28/sexo-e-dinheiro-e-o-que-nos-deixa-em-crise/

.related_post_palmetal {
-webkit-column-count: 3; /* Chrome, Safari, Opera */
-moz-column-count: 3; /* Firefox */
column-count: 3;
-webkit-column-gap: 60px; /* Chrome, Safari, Opera */
-moz-column-gap: 60px; /* Firefox */
column-gap: 60px;
-webkit-column-rule-style: solid; /* Chrome, Safari, Opera */
-moz-column-rule-style: solid; /* Firefox */
column-rule-style: solid;
-webkit-column-rule-color: gray; /* Chrome, Safari, Opera */
-moz-column-rule-color: gray; /* Firefox */
column-rule-color: gray;

-webkit-column-rule-width: 1px; /* Chrome, Safari, Opera */
-moz-column-rule-width: 1px; /* Firefox */
column-rule-width: 1px;
}

.related_break {
-webkit-column-break-inside: avoid; /* Chrome, Safari, Opera */
page-break-inside: avoid; /* Firefox */
break-inside: avoid; /* IE 10+ */
}

@media only screen and (max-width: 1000px) {

.related_post_palmetal {

-webkit-column-count: 1; /* Chrome, Safari, Opera */
-moz-column-count: 1; /* Firefox */
column-count: 1;
-webkit-column-gap: 60px; /* Chrome, Safari, Opera */
-moz-column-gap: 60px; /* Firefox */
column-gap: 60px;
-webkit-column-rule-style: solid; /* Chrome, Safari, Opera */
-moz-column-rule-style: solid; /* Firefox */
column-rule-style: solid;
-webkit-column-rule-color: gray; /* Chrome, Safari, Opera */
-moz-column-rule-color: gray; /* Firefox */
column-rule-color: gray;

-webkit-column-rule-width: 1px; /* Chrome, Safari, Opera */
-moz-column-rule-width: 1px; /* Firefox */
column-rule-width: 1px;

}

.related_break {

display: block !important;
padding-bottom: 30px !important;
}

}

IMPORTANT

You need to insert this in the four box of configs each line in each box

<div class=”related_post_palmetal”>

<div class=”related_break”>

</div>

</div>

https://ww.wp.xz.cn/plugins/wordpress-23-related-posts-plugin/