JSFiddle - React, Tailwind, and code Playground

by 규연 황

HTML

<div class="box">
  <div class="box-02">
    <div class="box-03">
      <div class="box-04">00</div>
    </div>
  </div>
</div>

CSS

html, body {
  height: 100%;
}
.box,
.box-02,
.box-03,
.box-04 {
  position: static;
}
.box {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #000000;
}
.box-02 {
  width: 90%;
  height: 90%;
  background-color: #999999;
}
.box-03 {
  width: 80%;
  height: 80%;
  background-color: #666666;
}
.box-04 {
  width: 100%;
  height: 100%;
  background-color: rgba(255,0,0,.5);
}