W3Schools Tryit Editor

<!DOCTYPE html>
<html>
<style>
body {font-family: Arial, Helvetica, sans-serif;}

form {
  border: 3px solid #f1f1f1;
  font-family: Arial;
}

.container {
  padding: 20px;
  background-color: #f1f1f1;
}

input[type=text], input[type=submit] {
  width: 100%;
  padding: 12px;
  margin: 8px 0;
  display: inline-block;
  border: 1px solid #ccc;
  box-sizing: border-box;
}

input[type=checkbox] {
  margin-top: 16px;
}

input[type=submit] {
  background-color: #04AA6D;
  color: white;
  border: none;
}

input[type=submit]:hover {
  opacity: 0.8;
}
</style>
<body>

<h2>CSS Newsletter</h2>

<form action="/action_page.php">
  <div class="container">
    <h2>Subscribe to our Newsletter</h2>
    <p>Lorem ipsum text about why you should subscribe to our newsletter blabla. Lorem ipsum text about why you should subscribe to our newsletter blabla.</p>
  </div>

<div class="container" style="background-color:white">
    <input type="text" placeholder="Name" name="name" required>
    <input type="text" placeholder="Email address" name="mail" required>
    <label>
      <input type="checkbox" checked="checked" name="subscribe"> Daily Newsletter
    </label>
  </div>

</body>
</html>

​x
 
<!DOCTYPE html><html><style>body {font-family: Arial, Helvetica, sans-serif;}​form {  border: 3px solid #f1f1f1;  font-family: Arial;}​.container {  padding: 20px;  background-color: #f1f1f1;}​input[type=text], input[type=submit] {  width: 100%;  padding: 12px;  margin: 8px 0;  display: inline-block;  border: 1px solid #ccc;  box-sizing: border-box;}​input[type=checkbox] {  margin-top: 16px;}​input[type=submit] {  background-color: #04AA6D;  color: white;  border: none;}​input[type=submit]:hover {  opacity: 0.8;}</style><body>​<h2>CSS Newsletter</h2>​<form action="/action_page.php">  <div class="container">    <h2>Subscribe to our Newsletter</h2>    <p>Lorem ipsum text about why you should subscribe to our newsletter blabla. Lorem ipsum text about why you should subscribe to our newsletter blabla.</p>  </div>