.whatsapp-fab {
    display: none;
}

@media (max-width: 768px) {
    .whatsapp-fab {
        display: flex;
        align-items: center;
        justify-content: center;
        position: fixed;
        right: 20px;
        bottom: 20px;
        width: 56px;
        height: 56px;
        border-radius: 50%;
        background: var(--color-whatsapp);
        color: var(--color-white);
        box-shadow: var(--shadow-card-hover);
        font-size: 28px;
        transition: var(--transition-base);
        z-index: var(--z-fab);
    }

    .whatsapp-fab:hover {
        transform: scale(1.08);
    }
}