JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
  <div class="box header">header</div>
  <div class="box table1">table 1</div>
  <div class="box table2">table 2</div>
  <div class="box table3">table 3</div>
  <div class="box header">header</div>
  <div class="box table1">table 1</div>
  <div class="box table2">table 2</div>
  <div class="box table3">table 3</div>
  <div class="box header">header</div>
  <div class="box table1">table 1</div>
  <div class="box table2">table 2</div>
  <div class="box table3">table 3</div>
  <div class="box header">header</div>
  <div class="box table1">table 1</div>
  <div class="box table2">table 2</div>
  <div class="box table3">table 3</div>
  

</div>

CSS

.wrapper {
  display: flex;
  flex-wrap: wrap;
  background-color: #fff;
  color: #444;
}

.box {
  flex: 1 0 8vw;
  margin: 2px;
  background-color: #444;
  color: #fff;
  border-radius: 5px;
  padding: 20px;
  font-size: 150%;
  box-sizing: border-box;
}