#backToTop {
    position: fixed;
    bottom: 30px;
    right: 24px;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, #10b981 0%, #047857 100%);
    color: #fff;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(0,0,0,0.25);
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s ease, transform .3s ease, visibility .3s;
    z-index: 999;
}

    #backToTop.show {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    #backToTop:hover {
        transform: translateY(-4px);
    }