JSFiddle - React, Tailwind, and code Playground

HTML

<div class="pd"></div>
<div class="pd"></div>
<div class="pd"></div>
<div class="viewports">
    <div class="vw"></div>
    <div class="vw"></div>
    <div class="vw"></div>
</div>

CSS

html, body{
    margin:0;
}
.viewports{

}
.pd{
    float:left;
    width:50%;
    padding-bottom:30%;
    background:#ccc;
    margin-right:2px;
    margin-bottom:10px;
}
.vw{
    float:left;
    width:5vw;
    height:5vw;
    margin-top:5px;
    background:#f0f;
    margin-right:2px;
    border-radius:50%;
}