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

.grid {
  position: relative;
  display: inline-grid;
  grid-template-columns: 2ch 2ch;
  gap: 20px;

  column-rule: 6px solid blue;
  column-rule-longitudinal-edge-inset: min(-100vw, -100vh);

  row-rule: 6px solid lime;
  row-rule-longitudinal-edge-inset: min(-100vw, -100vh);

  border: 4px dotted;
  margin: 30px;
  padding: 1ch;
  background: lightgrey;
}

.test2 { overflow: hidden; }

x {
  block-size: 48px;
  background: grey;
}

pre {
  font-size: 10px;
}
</style>
<body>
<pre>Both grids have '*-edge-inset: min(-100vw, -100vh)'.
The right grid has 'overflow: hidden' which clips its rules at the padding edge.</pre>
  <div class="grid test1"><x>1</x><x>2</x><x>3</x><x>4</x></div>
  <div class="grid test2" style="top:100px "><x>1</x><x>2</x><x>3</x><x>4</x></div>
</body>