.wfb-button {
    position: fixed;
    bottom: 25px;
    width: 56px;
    height: 56px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    box-shadow: 0 6px 16px rgba(37, 211, 102, 0.5);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

/* Hover effect (WhatsApp style) */
.wfb-button:hover {
    transform: scale(1.12);
    box-shadow: 0 10px 28px rgba(37, 211, 102, 0.7);
}

/* Pulse animation ring */
.wfb-button::after {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: rgba(37, 211, 102, 0.35);
    animation: wfb-pulse 2.5s infinite;
    z-index: -1;
}

/* Position */
.wfb-right {
    right: 25px;
}

.wfb-left {
    left: 25px;
}

/* Pulse keyframes */
@keyframes wfb-pulse {
    0% {
        transform: scale(1);
        opacity: 0.6;
    }
    70% {
        transform: scale(1.6);
        opacity: 0;
    }
    100% {
        opacity: 0;
    }
}