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<!doctype html>
<title>CSS Container Queries Test: font-relative calc - dynamic</title>
<link rel="help" href="https://drafts.csswg.org/css-contain-3/#size-container">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
body { font-size: 10px; }
body.larger { font-size: 20px; }
#container {
container-type: inline-size;
width: 100px;
color: red;
}
#intermediate {
font-size: 8px;
}
@container (width: calc(1em + 80px)) {
#target { color: green; }
}
</style>
<div id="container">
<div id=intermediate>
<div id="target"></div>
</div>
</div>
<script>
setup(() => assert_implements_container_queries());
test(() => {
assert_equals(getComputedStyle(target).color, 'rgb(255, 0, 0)');
document.body.className = 'larger';
assert_equals(getComputedStyle(target).color, 'rgb(0, 128, 0)');
}, 'font-relative calc() is responsive to container font-size changes');
</script>
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