How can CSS be utilized to enhance user interaction in PHP applications?

CSS can be utilized to enhance user interaction in PHP applications by creating visually appealing designs, animations, and effects. By using CSS to style elements such as buttons, forms, and navigation menus, you can improve the overall user experience and make your application more interactive.

<!DOCTYPE html>
<html>
<head>
    <style>
        /* CSS code for styling buttons */
        .btn {
            background-color: #4CAF50;
            border: none;
            color: white;
            padding: 10px 20px;
            text-align: center;
            text-decoration: none;
            display: inline-block;
            font-size: 16px;
            margin: 4px 2px;
            cursor: pointer;
            border-radius: 5px;
        }
        .btn:hover {
            background-color: #45a049;
        }
    </style>
</head>
<body>

<button class="btn">Click me</button>

</body>
</html>