body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

.whatsapp-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #25D366;
    color: white;
    font-size: 40px;
    padding: 25px;
    border-radius: 50%;
    box-shadow: 0px 2px 5px rgba(0, 0, 0, 0.1);
    text-decoration: none;
    transition: background-color 0.3s;
}

.whatsapp-button:hover {
    background-color: #128C7E;
}

.fa-whatsapp {
    display: block;
}