Display shadow DOM content within a host element.

HTML

<span>I'm not in the shadow DOM</span>

<div class="host">
  <template shadowrootmode="open">
    <style>
      /* @supports (-moz-appearance:none) {
        :host {
             div:has(.element) {
              padding: 1em;
              outline: 1px solid green;
             }
        }
      } */
      @scope (:host) to (.element) {
        * {
          padding: 1em;
          outline: 1px solid red;
        }
      }
    </style>
    <div class="wrapper1">
      <div class="wrapper2">
        <span class="element">I'm in the shadow DOM</span>
      </div>
    </div>
  </template>
</div>

CSS

.host {
  background-color: salmon;
}