.whatsapp-button {
            display: inline-block;
            padding: 10px 20px;
            font-size: 16px;
            color: white;
            background-color: #25D366;
            border: 2px solid blue;
            border-radius: 5px;
            text-decoration: none;
            font-weight: bold;
            transition: 0.3s;
        }

        .whatsapp-button:hover {
            background-color: blue;
            color: white;
        }