JSFiddle - React, Tailwind, and code Playground

by Ranganadh Paramkusam

HTML

<div id="demo"><div><div></div></div></div>

CSS

div {
    display: flex;
    width: calc(100% - 4em); 
    height:calc(100% - 4em);
    border: 1em solid blue; 
    border-radius:50%;
    margin: auto;
}
div#demo { width:9em; height:9em; }