simple example of using pointer events in css.

pointer-events-example.html

<main>
  <div></div>
  <div></div>
</main>

styles.css

main {
  pointer-events: none;
}

main > div {
  width: 20px;
  height: 20px;
  
  background: #000;
}

main > div:first-child {
  margin-bottom: 2px;
  pointer-events: none;
  
}

main > div:last-child {
  pointer-events: auto;
}

main:hover > div:first-child {
  background: #f00;
}