.whatsapp-float {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 9999;
    width: 58px;
    height: 58px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: #25D366;
    color: #fff;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.whatsapp-float:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.34);
    color: #fff;
}

@media (max-width: 640px) {
    .whatsapp-float {
        right: 0.9rem;
        bottom: 0.9rem;
        width: 52px;
        height: 52px;
    }
}