.whatsapp-button {
    position: fixed;
    bottom: 20px;
    left: 20px; /* left side */
    z-index: 1000;
    width: 60px;      /* fixed width */
    height: 60px;     /* fixed height */
    border-radius: 50%;
    background-color: #25D366; /* WhatsApp green */
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    animation: bounce 2s infinite;
    transition: transform 0.3s;
    overflow: hidden;
}

.whatsapp-button img {
    width: 40px;   /* fixed size of the icon inside button */
    height: 40px;  /* maintain square ratio */
    object-fit: contain;
}

.whatsapp-button:hover {
    transform: scale(1.2);
}

/* Bounce animation */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}