html {
    display: flex;
    width: 100%;
    min-width: 100%;
    max-width: 100%;
    height: 100%;
    min-height: 100%;
    max-height: 100%;
}

body {
    flex-grow: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

img {
    min-width: 40vw;
    max-width: 80%;
}