JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container-card">
    <div class="container-holder">

    </div>
  </div>

SCSS

.container-card {
    background-color: grey;
    height: 500px;
    .container-holder {
      background-color: gold;
      width: calc(100% - 14px);
      height: 300px;
    }
  }