<!DOCTYPE html>
<title>text-box-trim references the block container metrics, not inline descendants</title>
<link rel="help" href="https://drafts.csswg.org/css-inline-3/#text-box-trim">
<link rel="help" href="https://drafts.csswg.org/css-inline-3/#text-box-edge">
<link rel="match" href="text-box-trim-tall-line-001-ref.html">
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
.spacer {
background: lightgray;
block-size: 100px;
}
.target {
font: 100px/2 Ahem;
text-box-trim: trim-both;
text-box-edge: text;
}
</style>
<div class="spacer"></div>
<div class="target">A<span style="font-size: 200%">X</span></div>
<div class="spacer"></div>