#scrollToTopBtn {
    display: none;
    position: fixed;
    bottom: 45px;
    right: 30px;
    z-index: 9999;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 50%;
    background-color: #333;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    opacity: 0.4;
    transition: opacity 0.3s ease, transform 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    align-items: center;
    justify-content: center;
}

    #scrollToTopBtn:hover {
        opacity: 0.85;
        transform: translateY(-3px);
    }