Styling Modal

If you are using the adblock extension below 2.7.2 then you can style directly targeting classes.

Styling > v2.7.2

The modal format is

<div class="modal"  id="modal">
    <div class="content" id="content">
        <div class="body" id="body">
             <!-- Theme Code --->
         </div>
    </div>
</div>

You can add custom css using these classes or ids

You have to use target class or id alike below

For Outer Modal

Class : modal or id : modal

.[RCLASS_modal_RCLASS]{
    //your style
}

#[RCLASS_modal_RCLASS]{
    //your style
}

For Modal Content:

Class : content or id : content

.[RCLASS_content_RCLASS]{
    //your style
}

#[RCLASS_content_RCLASS]{
    //your style
}

Targeting any classes or id

Format for targeting any classes or ids

[RCLASS_YOURCLASSORID_RCLASS]{

}