ua-style-sheet-margin-4-ref.html

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<!DOCTYPE html>

<meta charset=utf-8>

<title>Test for logical margins on h[123] elements in the UA style sheet</title>

<style>

.v-rl { writing-mode: vertical-rl; }

.ltr, .rtl, .v-rl { border: 1px solid blue; }

h1, h2, h3 { font-size: 16px; border: 1px solid purple; }

.ltr h1 { margin: 0.67em 0; }

.rtl h1 { margin: 0.67em 0; }

.v-rl h1 { margin: 0 0.67em; }

.ltr h2 { margin: 0.83em 0; }

.rtl h2 { margin: 0.83em 0; }

.v-rl h2 { margin: 0 0.83em; }

.ltr h3 { margin: 1em 0; }

.rtl h3 { margin: 1em 0; }

.v-rl h3 { margin: 0 1em; }

</style>

<div class=ltr>

  <h1>Heading 1</h1>

  <h2>Heading 2</h2>

  <h3>Heading 3</h3>

</div>

<div class=rtl dir=rtl>

  <h1>Heading 1</h1>

  <h2>Heading 2</h2>

  <h3>Heading 3</h3>

</div>

<div class=v-rl>

  <h1>Heading 1</h1>

  <h2>Heading 2</h2>

  <h3>Heading 3</h3>

</div>