W3Schools Tryit Editor

<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/5/w3.css">
<body>

<header class="w3-container w3-teal">
  <h1>Login Example</h1>
</header>

<p>
<input class="w3-input" type="text" style="width:90%" required>
<label>Name</label></p>
<p>
<input class="w3-input" type="password" style="width:90%" required>
<label>Password</label></p>

<p>
<input class="w3-radio" type="radio" name="gender" value="female">
<label>Female</label></p>

<p>
<input class="w3-radio" type="radio" name="gender" value="" disabled>
<label>Don't know (Disabled)</label></p>

<p>
<input id="milk" class="w3-check" type="checkbox" checked="checked">
<label>Stay logged in</label></p>

</form>

</div>

</body>
</html>

​x
 
<!DOCTYPE html><html><title>W3.CSS</title><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="https://www.w3schools.com/w3css/5/w3.css"><body>​<header class="w3-container w3-teal">  <h1>Login Example</h1></header>​<div class="w3-container w3-half w3-margin-top">​<form class="w3-container w3-card-4">​<p><input class="w3-input" type="text" style="width:90%" required><label>Name</label></p><p><input class="w3-input" type="password" style="width:90%" required><label>Password</label></p>​<p><input class="w3-radio" type="radio" name="gender" value="male" checked><label>Male</label></p>​<p><input class="w3-radio" type="radio" name="gender" value="female"><label>Female</label></p>​<p><input class="w3-radio" type="radio" name="gender" value="" disabled><label>Don't know (Disabled)</label></p>​<p><input id="milk" class="w3-check" type="checkbox" checked="checked"><label>Stay logged in</label></p>​<p><button class="w3-button w3-section w3-teal w3-ripple"> Log in </button></p>​</form>​</div>​</body></html> 