JSFiddle - React, Tailwind, and code Playground

HTML

<div>
  <section></section>
  <section></section>
  <section></section>
</div>

CSS

:root {
  --outer-spacing: 100px;
}

body {
  margin: 0;
}

div {
  width: 100vw;
  overflow: auto;
  box-sizing: border-box;
  white-space: nowrap;
  font-size: 0;           /* Prevent unwanted inline-block spacing */
}

section {
  font-size: 16px;        /* Restore base font size */
  width: 300px;
  margin: 0 15px;
  height: 300px;
  background: red;
  display: inline-block;
}

section:first-of-type {
  margin-left: var(--outer-spacing);
}

section:last-of-type {
  margin-right: var(--outer-spacing);
}