JSFiddle - React, Tailwind, and code Playground

HTML

<div id="applyCSS">
    I won't be styled
    <div class="a">
        div class a
        <h3 class="b" style= "color: blue">h3 class b</h3>
        <div class="d">div class d</div>
    </div>
</div>

CSS

#applyCSS > * {
  color: red;
}