.btn img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.btn {
    max-width: 170px;
}

@media (max-width: 768px) {

    .btn img {
        width: 30px;
        height: 30px;
    }

    .btn {
        max-width: 120px;
    }

}