.whatsapp-button {
    z-index: 9999;
    position: fixed;
    bottom: 1.5rem;
    right: 2rem;
    background-color: #25D366; 
    color: white;
    border: none;
    border-radius: 50%;
    width: 4.4rem;
    height: 4.4rem;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.2);
}

.whatsapp-button a {
    text-decoration: none;
}

.fa-whatsapp {
    font-size: 2.3rem;
}

.whatsapp-button:hover {
    background-color: #137447;
    transition: background-color 0.3s;
}

@media (max-width: 824px) {
    .whatsapp-button {
        width: 3.2rem;
        height: 3.2rem;
        bottom: 1rem;
        right: 1rem;
    }
    .fa-whatsapp {
        font-size: 1.6rem;
    }
}