Code Playground

@charset "UTF-8";
@import url(https://fonts.googleapis.com/css?family=Nunito+Sans:300,400,600,700,800);
*,
:after,
:before {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
article {
  --border-width: 2px;
  --outer-radius: calc(var(--radius) * var(--unit));
  --outer-padding: calc(var(--padding) * var(--unit));
  --inner-radius: calc((var(--outer-radius) - var(--outer-padding)) - var(--border-width));
}

* {
  box-sizing: border-box;
}

body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  background: hsl(0 0% 98%);
  font-family: SF Pro Display, SF Pro Icons, Helvetica Neue, Helvetica, Arial, sans-serif;
}

:is(article, article > div) {
  border: var(--border-width) solid hsl(0 0% 80%);
}

:root {
  --padding: 8;
  --radius: 28;
  --zoom: 1;
  --unit: 1px;
}

article {
  --rad: var(--outer-radius);
  border-radius: var(--outer-radius);
  padding: var(--outer-padding);
  aspect-ratio: 1;
  width: 85vmin;
  max-width: 800px;
  display: grid;
  place-items: center;
  position: relative;
  position: fixed;
  top: 50%;
  left: 50%;
  transform-origin: 0 0;
  scale: calc(1 + (var(--zoom, 0) * 3.5));
  --translation: calc(-50% + (var(--zoom, 0) * 25%));
  translate: var(--translation) var(--translation);
  transition: translate 0.2s, scale 0.2s;
}

:is(.padding, .outer, .inner) {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  font-weight: bold;
  font-size: 0.45rem;
  line-height: 1;
  display: inline-block;
}

.padding {
  color: hsl(0 0% 70%);
  left: calc(var(--outer-radius) + 0.5rem);
  top: calc(var(--outer-padding) * 0.5);
  translate: 0 -50%;
}

.inner {
  color: hsl(213, 89%, 51%);
  left: calc((var(--outer-padding) + (var(--inner-radius) * 0.5)));
  top: calc((var(--outer-padding) + (var(--inner-radius) * 0.5)));
  translate: 0 0%;
}

.outer {
  color: hsl(120, 100%, 41%);
  left: calc(var(--outer-radius) * 0.1);
  top: calc(var(--outer-radius) * 0.1);
  translate: -100% -100%;
}

article::after,
article > div::after {
  content: "";
  position: absolute;
  inset: calc(var(--border-width) * -1);
  border-radius: var(--rad);
  border: var(--border-width) solid hsl(120, 100%, 41%);
  clip-path: polygon(0 0, var(--rad) 0, var(--rad) var(--rad), 0 var(--rad));
}

article > div {
  background: hsl(212, 100%, 92%);
  height: 100%;
  width: 100%;
  position: relative;
  border-radius: var(--inner-radius);
}

article > div::after {
  --rad: calc(var(--inner-radius));
  border-radius: var(--inner-radius);
  border-color: hsl(209, 100%, 50%);
}

console.log("Event Fired")
import { GUI } from "https://cdn.skypack.dev/dat.gui@0.7.9";

console.clear()

const PADDING = document.querySelector('.padding')
const OUTER = document.querySelector('.outer')
const INNER = document.querySelector('.inner')

const CONFIG = {
  padding: 8,
  radius: 28,
  zoom: true,
  unit: 'px',
};

const CTRL = new GUI();
CTRL.add(CONFIG, "radius", 0, 100, 0.25).name("Radius").onChange(UPDATE);
CTRL.add(CONFIG, "padding", 0, 100, 0.25).name("Padding").onChange(UPDATE);
CTRL.add(CONFIG, "zoom").name("Zoomed in").onChange(UPDATE);
CTRL.add(CONFIG, "unit", ['px', 'rem']).name("Unit").onChange(UPDATE);

UPDATE()

Frontend Forever App