    <style>
        body {
            height: 2000px; /* Just for demonstration */
            background: linear-gradient(to bottom, #f0f0f0, #ffffff);
        }
        .back-to-top {
            position: fixed;
            bottom: 20px;
            right: 20px;
            display: none; /* Hidden by default */
            background: #cc0000; /* Customize background */
            color: #fff; /* Customize text color */
            border: none;
            border-radius: 5px;
            padding: 12px;
            cursor: pointer;
            z-index: 1000; /* Make sure it’s on top */
        }
    </style>