<!DOCTYPE html>
<title>CSS Container Queries Test: calc()</title>
<link rel="help" href="https://drafts.csswg.org/css-contain-3/#size-container">
<link rel="help" href="https://drafts.csswg.org/mediaqueries-4/#units">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
  :root { font-size: 10px; }

  /* To make output more readable */
  :root > * { font-size: initial; }

  #container {
    container-type: size;
    width: 200px;
    height: 50px;
  }
  @container (width = calc(100px + 10rem)) {
    #target { color: green; }
  }
</style>
<div id=container>
  <div id=target></div>
</div>
<script>
  setup(() => assert_implements_container_queries());

  test(() => {
    assert_equals(getComputedStyle(target).color, 'rgb(0, 128, 0)');
  }, 'em relative inline-size');
</script>
