JSFiddle - React, Tailwind, and code Playground

HTML

<div class="flex-container">
<div class="card-container">Первый див</div>
<div class="card-container">Второй див</div>
<div class="card-container">Третий див</div>
</div>

CSS

.flex-container {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
}
.card-container {
  padding: 10px;
  margin: 2px;
  flex-grow: 1;
  background-color: #0984e3;
  color: #fff;
	border-radius: 5px;
	box-shadow: 0px 10px 20px -10px rgba(0,0,0,0.75);
}