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Test Info:

<!DOCTYPE html>
<html>
<head>
<title>CSS Borders: border-left-width: thin equals 1px</title>
<link rel="match" href="reference/border-right-width-1px-ref.html">
<meta name="assert" content="The 'thin' keyword for 'border-left-width' is 1px." />
<style>
div { display: inline-block; height: 100px; }
.red-if-too-thin { width: 1px; background: red; }
.cb { position: relative; }
.red-if-too-thick { width: 20px; background: red; }
.overlap-red-if-too-thick { width: 20px; background: white; position: absolute; left: 0; }
.border-test { border-left-style: solid; border-left-width: thin; margin-left: -1px; }
</style>
</head>
<body>
<p>There should be a black line below and no red.</p>
<div class=red-if-too-thin></div><!--
--><div class=cb><!--
--><div class=border-test></div><!--
--><div class=red-if-too-thick></div><!--
--><div class=overlap-red-if-too-thick></div><!--
--></div>
</body>
</html>