.whatsapp-btn{
                position: fixed;
                bottom: 20px;
                right: 20px;
                z-index: 9999;
                width: 60px;
                height: 60px;
                border-radius: 50%;
                background-color: #25D366;
                display: flex;
                align-items: center;
                justify-content: center;
                box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
                animation: whatsapp-btn-breathe 2s ease-in-out infinite;
            }
            .whatsapp-btn svg {
                color: #fff;
                font-size: 24px;
                animation: whatsapp-btn-beat 2s ease-in-out infinite;
                text-decoration: none;
            }
            @keyframes whatsapp-btn-breathe {
                0% {
                box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.5);
                }
                70% {
                box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
                }
                100% {
                box-shadow: 0 0 0 0 rgba(0, 0, 0, 0);
                }
            }
            @keyframes whatsapp-btn-beat {
                0% {
                transform: scale(1);
                }
                50% {
                transform: scale(1.2);
                }
                100% {
                transform: scale(1);
                }
            }