In what ways can CSS be used to enhance the visual appearance and layout of a form created with PHP on a website?

CSS can be used to enhance the visual appearance and layout of a form created with PHP on a website by styling the form elements such as input fields, buttons, and labels. This can include changing the colors, fonts, sizes, and positioning of the form elements to make them more visually appealing and user-friendly.

<form action="submit.php" method="post">
  <label for="name">Name:</label>
  <input type="text" id="name" name="name">

  <label for="email">Email:</label>
  <input type="email" id="email" name="email">

  <input type="submit" value="Submit">
</form>
```

```css
form {
  background-color: #f4f4f4;
  padding: 20px;
  border-radius: 5px;
}

label {
  display: block;
  margin-bottom: 5px;
}

input[type="text"],
input[type="email"],
input[type="submit"] {
  width: 100%;
  padding: 10px;
  margin-bottom: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
}

input[type="submit"] {
  background-color: #007bff;
  color: white;
  cursor: pointer;
}

input[type="submit"]:hover {
  background-color: #0056b3;
}