@media print {
    * {
        background: transparent !important;
        color: #000 !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    body {
        font-family: 'Roboto', sans-serif;
        background: #fff;
        color: #646464;
        font-size: 16px;
        line-height: 1.4;
    }
    #nav,
    #nav_second,
    #sidebar,
    #conference,
    #footer,
    #backtotop,
    .meta .pull-right,
    #backtotop,
    .skip-main {
        display: none;
    }
    a,
    a:visited {
        text-decoration: underline;
    }
    a[href]:after {
        content: "";
    }
    abbr[title]:after {
        content: "";

    }
    .ir a:after,
    a[href^="javascript:"]:after,
    a[href^="#"]:after {
        content: "";
    }
    pre,
    blockquote {
        border: 1px solid #999;
        page-break-inside: avoid;
    }
    thead {
        display: table-header-group;
    }
    tr,
    img {
        page-break-inside: avoid;
    }
    img {
        max-width: 100% !important;
    }
    @page {
        margin: 0.5cm;
    }
}