         </div>
        </div>


        <h3>Shadow DOM</h3>
        <span id="not-in-shadow">I'm not in the shadow DOM</span>
        <div id="shadow-root-host">
            <template shadowrootmode="open">
                <span id="in-shadow">I'm in the shadow DOM</span>
                <span id="also-in-shadow">I'm also in the shadow DOM</span>
                <div id="level-1">
                    Level 1 text.
                    <div id="level-2">
                        Level 2 text.
                