div.cleaner-hr {
    background-color: #c8c8c8;
    clear: both;
    display: block;
    height: 1px;
    margin: 10px 0px;
}
div.box-reference a img {
    border: 1px solid #c8c8c8;
}
div.box-reference a:hover img {
    border: 1px solid #000;
}