body {
    margin: 0;
}

img {
    display: block;
    margin: auto;
    width: 100%;
}

@media screen and (min-width: 769px) {
    img {
        width: 70%;
        
    }
}

@media screen and (min-width: 1201px) {
    img {
        width: 60%;
        
    }
}