JSFiddle - React, Tailwind, and code Playground

by luka kupunia

HTML

<div class="row">
    <div class="left"></div>
    <div class="left">
        <div class="box"></div>
    </div>
</div>

CSS

body {
    margin: 0;
}
div.left:nth-child(1) {
    width: 80%;
    padding-top: 20%;
    background: red;
    float:left;
}
div.left:nth-child(2) {
    width: 20%;
    background: blue;

    float:left;
}
div.box {
        padding-top: 100%;
        background: black;
}
div.row:after {
    content: '';
    display: table;
    clear: both;
}