.cover{
    width: 100vw;
    height: calc(100vh - 70px);
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}
.cover img{
    max-width: 100vw;
    max-height: calc(100vh - 70px);
    width: auto;
    height: auto;
    justify-self: center;
    align-self: center;
    display: block;
}