.mw-13{
    max-width: 13%;
}
.thumbnail{
    max-width: 100px;
}
.bg-cover{
    background-size: cover;
    background-repeat: no-repeat;
    background-position: left;
}
.page-link-active{
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
}