#io-link img {
    width: 50%;
    filter: contrast(1.5);
}

#io-link p {
    opacity: 0;
    color: blue;
}

#io-link:hover img {
    filter: contrast(1);
}

#io-link:hover p {
    opacity: 1;
}

.interface-observation-force img {
    filter: contrast(1) !important;
}