.whatsapp-fab {
    position: fixed;
    right: 24px;
    bottom: 100px;
    width: 58px;
    height: 58px;
    border-radius: 50%;
    background: linear-gradient(135deg, #25d366 0%, #128c7e 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(18, 140, 126, 0.35);
    cursor: pointer;
    z-index: 5000;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.whatsapp-fab:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 12px 26px rgba(18, 140, 126, 0.45);
}

.whatsapp-fab i {
    font-size: 1.8rem;
}

.whatsapp-fab-tooltip {
    position: absolute;
    right: 72px;
    top: 50%;
    transform: translateY(-50%);
    background: #0f172a;
    color: #fff;
    border-radius: 10px;
    padding: 8px 10px;
    font-size: 12px;
    line-height: 1.25;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    min-width: 170px;
}

.whatsapp-fab:hover .whatsapp-fab-tooltip {
    opacity: 1;
}

.whatsapp-fab-tooltip .linea-1 {
    display: block;
    font-weight: 700;
}

.whatsapp-fab-tooltip .linea-2 {
    display: block;
    color: #86efac;
}

@media (max-width: 768px) {
    .whatsapp-fab {
        right: 16px;
        bottom: 90px;
        width: 54px;
        height: 54px;
    }

    .whatsapp-fab-tooltip {
        display: none;
    }
}