.popup-whatsapp {
    width: 4%;
    height: 7vh;
    z-index: 2;
    bottom: 5vh;
    right: 30px;
    position: fixed;
}
.popup-whatsapp img {
    width: 100%;
}

@media screen and (max-width: 768px) {
    .popup-whatsapp {
        width: 6%;
        height: 7vh;
        z-index: 2;
        bottom: 5vh;
        right: 30px;
        position: fixed;
    }
    .popup-whatsapp img {
        width: 100%;
    }
}

@media screen and (max-width: 428px) {
    .popup-whatsapp {
        width: 15%;
        height: 7vh;
        z-index: 2;
        bottom: 6vh;
        right: 30px;
        position: fixed;
    }
    .popup-whatsapp img {
        width: 100%;
    }
}