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<!doctype html>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<title>Examples of column-rule-lateral-inset-start</title>
<style>
html,body {
  color:black; background-color:white; font:20px/1 monospace;
}

.grid {
  position: relative;
  display: inline-grid;
  grid-template-columns: auto auto;
  gap: 4px 16px;

  column-rule: solid blue;

  margin-right: 8ch;
  background: lightgrey;
  padding: 10px;
}

x {
  inline-size: 50px;
  block-size: 1.5em;
  background: grey;
}

.test1 {
  column-rule-lateral-inset-start: 0;
}
.test2 {
  column-rule-lateral-inset-start: 3px;
}

.grid::after {
  position: absolute;
  white-space: pre;
  bottom: -2em;
  content: attr(test);
  font-size: 10px;
}
pre {
  font-size: 10px;
}
</style>

<pre>
Examples of aligning a rule at the start of the gap with a lateral offset:
</pre>
<div class="grid test1"><x>1</x><x>2</x></div>
<div class="grid test2"><x>1</x><x>2</x></div>


<script>
window.onload = function() {
  [...document.querySelectorAll('.grid')].forEach(function(elm) {
    const cs = window.getComputedStyle(elm);
    elm.setAttribute("test", 
      "column-rule-lateral-inset-start: " + cs.columnRuleLateralInsetStart
    );
  });
}
</script>