<!doctype html>
<meta charset="utf-8">
<title>:host(:has(...)) complex descendent</title>
<link rel="help" href="https://drafts.csswg.org/css-scoping/#host-selector">
<link rel="match" href="/css/reference/ref-filled-green-100px-square-only.html">
<p>Test passes if there is a filled green square.</p>
<div id="host">
<template shadowrootmode="open">
<style>
div {
width: 100px;
height: 100px;
background-color: red;
}
:host(:has(section h1)) div {
background-color: green;
}
</style>
<div></div>
<slot></slot>
</template>
<section>
<h1></h1>
</section>
</div>