#scrollBtn {
        display: none;
        position: fixed;
        bottom: 20px;
        right: 30px;
        z-index: 99;
        font-size: 18px;
        border: none;
        outline: none;
        background-color: #333;
        color: white;
        cursor: pointer;
        padding: 15px;
        border-radius: 4px;
    }

    #scrollBtn:hover {
        background-color: #555;
    }