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<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>CSS Multi-column Layout Test Reference: Test the column rules' block-size with nested balancing multicol container</title>
<link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
<style>
.outer {
column-count: 2;
column-rule: 6px solid black;
column-fill: auto;
width: 400px;
height: 250px;
}
.inner {
column-count: 2;
column-rule: 3px solid gray;
column-fill: auto;
height: 200px;
}
.inner-block {
background-color: lightblue;
height: 400px;
}
.space {
height: 50px;
}
</style>
<article class="outer">
<article class="inner">
<div class="inner-block"></div>
</article>
<div class="space"></div>
<article class="inner">
<div class="inner-block"></div>
</article>
<div class="space"></div>
</article>
</html>