.st3s-whatsapp {
    position: fixed;
    right: 20px;
    bottom: 90px;
    width: 60px;
    height: 60px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    animation: st3s-wa-pulse 1.5s infinite;
}

.st3s-whatsapp:hover {
    background: #1ebe5d;
}

@keyframes st3s-wa-pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}