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<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="../lib/w3.css">
<body>

<form class="w3-container w3-card-4 w3-light-grey">

<h2>Rounded Input</h2>
<p>Use any of the w3-round classes to create rounded borders.</p>

<p>
<label>First Name</label>
<input class="w3-input w3-border w3-round" name="first" type="text"></p>

<p>
<label>Last Name</label>
<input class="w3-input w3-border w3-round-large" name="last" type="text"></p>

<p>
<label>Last Name</label>
<input class="w3-input w3-border w3-round-xxlarge" name="last" type="text"></p>

</form>

</body>
</html>


Result:
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