JSFiddle - React, Tailwind, and code Playground

HTML

<body id="pageUID-222">
 <div class="container" id="container-1">
    <div id="c900" class="csc-default">...</div>
    <div id="c901" class="csc-default csc-space-after-100">...</div>
    <div id="c901" class="csc-default">...</div>
 </div>
 <div class="container" id="container-2">
    <div id="c900" class="csc-default">...</div>
    <div id="c901" class="csc-default csc-space-after-150">...</div>
    <div id="c901" class="csc-default">...</div>
    </div>

CSS

div.container > div {
    height:20px;
    border:1px solid;
    background: #f9f9f9;
    clear:both;
    margin-bottom:1px;
    width:10%;
}

div.container .csc-space-after-150 {
margin-bottom:10px;
background:red;

}