.whatsapp-chat-btn {
    position: fixed;
    bottom: 28px;
    right: 28px;
    z-index: 9999;
    background: #25D366;
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    box-shadow: 0 4px 16px rgba(37,211,102,0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: box-shadow 0.2s, transform 0.2s;
    font-size: 2.2rem;
}

.whatsapp-chat-btn:hover {
    box-shadow: 0 8px 32px rgba(37,211,102,0.28);
    transform: scale(1.08);
    background: #128C7E;
}

.whatsapp-chat-tooltip {
    position: absolute;
    right: 70px;
    bottom: 18px;
    background: #fff;
    color: #2e7d32;
    padding: 8px 18px;
    border-radius: 18px;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(46,125,50,0.10);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.whatsapp-chat-btn:hover + .whatsapp-chat-tooltip {
    opacity: 1;
}

@media (max-width: 600px) {
    .whatsapp-chat-btn {
        width: 44px;
        height: 44px;
        font-size: 1.5rem;
        bottom: 12px;
        right: 12px;
    }

    .whatsapp-chat-tooltip {
        font-size: 0.92rem;
        right: 54px;
        bottom: 2px;
        padding: 6px 12px;
    }
}