Mirlo uses 'Web Components' and they use the tag 'template'. More info here: https://developer.mozilla.org/en-US/docs/Web/API/Web_Components/Using_templates_and_slots
The most important thing when creating templates is to be clear about the scope
of the nodes. The template has its own scope and parent styles do not affect
it... that's why there is the useStyles() hook function (you can also use the
`link' tag directly in the template).
The slots, on the other hand, do not belong to the scope of the template. So you will have to inject the style for these nodes in the appropriate document.