.buttonDocuments {
    background-color: #455f8a;
    border: none;
    color: white;
    padding: 6px 28px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 13px;
    margin: 4px 2px;
    cursor: pointer;
}

.gallery li.Selected {
    background-color: #959ba5;
}