.slika {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

.slika img {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    -webkit-filter: grayscale(100%);
    /* Safari 6.0 - 9.0 */
    filter: grayscale(100%);
    transition: all 0.2s ease-in;
}

.slika img:hover {
    -webkit-filter: grayscale(0%);
    /* Safari 6.0 - 9.0 */
    filter: grayscale(0%);
}

.reference-link {
    display: flex;
    flex-direction: column;
    width: 192px;
    height: 182px;
    margin-left: 7px;
    margin-right: 7px;
    margin-top: 7px;
    margin-bottom: 7px;
    padding: 0;
    text-decoration: none;

}
@media screen and (max-width: 470px) {
    .reference-link {
        width: 106px;
        height: 100px;
    }
}