#logos-footer {
    list-style-type: none;
    text-align: center;
    margin-top: 10px;
}

#logos-footer li {
    display: inline;
    text-align: center;
    margin: 0 10px 0 0;
}

.img-gray-link {
    opacity: .6;
    filter: grayscale(90%);
    -webkit-filter: grayscale(90%);
}

.img-gray-link:hover {
    filter: none;
    -webkit-filter: grayscale(0);
    opacity: 1;
}