JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" />
<a href="#">Dummy Link</a>

<div class="blah">
    <div class="target">Complicated Selector, Isn't It?</div>
</div>

CSS

input[type=checkbox]:checked + a + .blah .target {
    display: block;
}

.target {
    display: none;
}