JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>List item one</li>
    <li>List item two with subitems:
        <ul>
            <li>Subitem 1</li>
            <li>Subitem 2</li>
        </ul>
    </li>
    <li>Final list item</li>
</ul>

CSS

ul li {
  background-color:yellow;
  height:40px;
}

ul li li {
  background-color:red;
  height:40px;
}