JSFiddle - React, Tailwind, and code Playground

HTML

<div class="block">

  <div class="item item--big"></div>
  <div class="item item--big"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>

</div>

CSS

* {
  box-sizing: inherit;
}

html {
  box-sizing: border-box;
}

body {
  margin: 0;
}

.block {
  display: grid;
  grid-template-columns: 1fr;
  grid-gap: 20px;
  width: 80%;
  margin: 20px auto;
}

.item {
  background: deepskyblue;
  height: 50px;
}

@media (min-width: 400px) {
  .block {
    grid-template-columns: repeat(2, 1fr);
  }

  .item--big {
    grid-column: span 2;
  }
}

@media (min-width: 768px) {
  .block {
    grid-template-columns: repeat(4, 1fr);
  }
}