#content a {
    width: 8em;
    height: 8em;
}
img {
    width: 8em;
    /* -webkit-filter: grayscale(100%); */
    /* filter: grayscale(100%) contrast(2); */
}

img:hover {
    position: relative;
    left: -0.5em;
    top: -0.5em;
    width: 9em;
}

#content {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
}

#links {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: stretch;
    justify-content: space-evenly;
}

#links div{
    margin: 1.75em;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
}

#links div div{
    font-size: 2em;
    justify-content: center;
}