.cover{
    width: 100dvw;
    height: min(calc(100dvh - 70px), calc(100dvw * 7 / 13));
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}
.cover img{
    width: min(100dvw, calc((100dvh - 70px) * 13 / 7));
    height: min(calc(100dvh - 70px), calc(100dvw * 7 / 13));
    display: block;
}