.whatsapp-btn {
    position: fixed;
    bottom: 25px;
    right: 25px;
    z-index: 1000;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: linear-gradient(135deg, #25D366, #128C7E);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.whatsapp-btn svg {
    width: 40px;
    height: 40px;
    fill: #fff; /* ícono blanco */
}

.whatsapp-btn:hover {
    transform: scale(1.2) translateY(-5px);
    box-shadow: 0 12px 25px rgba(0,0,0,0.35);
}