JSFiddle - React, Tailwind, and code Playground

HTML

<div>
  <span class="gutter"></span>
  <section></section>
  <section></section>
  <section></section>
  <span class="gutter"></span>
</div>

CSS

body {
  margin: 0;
}

div {
  width: 100vw;
  display: flex;
  overflow: auto;
  box-sizing: border-box;
}

.gutter {
  flex: 0 0 100px;
}

section {
  flex: 0 0 300px;
  margin: 0 15px;
  height: 300px;
  background: red;
}