LOL this is so cool

Check this out

  ```css

  figure:has(input[type="checkbox"]:checked) figcaption {
    /\* if a figure has a checkbox checked, 
    apply this to its figcaption... \*/
    font-size: 90%;
    font-style: italic;
    margin: 0.6rem 0 0.1rem;
  }

  ```

https://codepen.io/julienreszka/pen/yLKZRRX