JSFiddle - React, Tailwind, and code Playground

HTML

<div id="flex-container">
  <div class="box box1"></div>
  <div class="box box2"></div>
</div>

CSS

#flex-container {
	display: flex;
}

.box {
	width: 200px;
	height: 200px;
}

.box1 {
	background-color: aqua;
	z-index: 1;
	}

.box2 { 
	background-color: gray;
	border: 2px dashed black;
	margin-left: -25px;
	}