.whatsapp-float {
    position: fixed;
    bottom: 20px;
    left: 20px; /* Left side */
    width: 60px;
    height: 60px;
    background: #25D366;
    color: #fff;
    border-radius: 50%;
    text-align: center;
    font-size: 35px;
    line-height: 60px;
    z-index: 9999;
    box-shadow: 0 4px 10px rgba(0,0,0,.3);
    transition: all .3s ease;
    text-decoration: none;
}

.whatsapp-float:hover {
    background: #20ba5a;
    color: #fff;
    transform: scale(1.1);
}
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(37,211,102,.7);
    }
    70% {
        box-shadow: 0 0 0 20px rgba(37,211,102,0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(37,211,102,0);
    }
}

.pulse {
    animation: pulse 1.5s infinite;
}