.gom ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.gom ul li {
    margin: 8px;
}

.gom ul li a {
    display: block;
}

.gom ul li a img {
    display: block;
    width: 100%;
    border: 3px solid silver;
    border-radius: 5%;

}

.gom ul li a img:hover {
    cursor: zoom-in;
    -webkit-box-shadow: 9px 15px 5px -3px rgba(93,73,132,1);
    -moz-box-shadow: 9px 15px 5px -3px rgba(93,73,132,1);
    box-shadow: 9px 15px 5px -3px rgba(93,73,132,1);
}