.site-fab {
    position: fixed;
    z-index: 9990;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.18);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.site-fab:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.24);
}

.site-fab img {
    width: 80px;
    height: 80px;
    display: block;
}