body {
    background-image: url(https://www.irgups.ru/eis/studcab/pics/irgups.jpg);
    background-repeat: no-repeat;
    background-attachment: scroll;
    background-position: right top;
    background-clip: border-box;
    background-origin: padding-box;
    background-size: auto auto;
}

@media screen and (max-width: 600px) {
    .table-responsive-custom {
        border: 0;
    }

    .table-responsive-custom caption {
        font-size: 1.3em;
    }

    .table-responsive-custom thead {
        border: none;
        clip: rect(0 0 0 0);
        height: 1px;
        margin: -1px;
        overflow: hidden;
        padding: 0;
        position: absolute;
        width: 1px;
    }

    .table-responsive-custom tr {
        border-bottom: 3px solid #ddd;
        display: block;
        margin-bottom: .625em;
    }

    .table-responsive-custom td {
        border-bottom: 1px solid #ddd;
        display: block;
        font-size: .8em;
        text-align: right;
    }

    .table-responsive-custom td::before {
        /*
        * aria-label has no advantage, it won't be read inside a table
        content: attr(aria-label);
        */
        content: attr(data-label);
        float: left;
        font-weight: bold;
        text-transform: uppercase;
    }

    .table-responsive-custom td:last-child {
        border-bottom: 0;
    }
}
/* .nav-tabs .nav-link.active{
    background-color: #28a745;
    color: white;
} */
/* .nav-tabs .nav-link.active {
    border: 1px solid #28a745;
    color: #28a745;
} */