@media (min-width: 768px) {
    .sidebar {
        position: fixed;
        top: 51px;
        bottom: 0;
        left: 0;
        z-index: 1000;
        display: block;
        padding: 20px;
        overflow-x: hidden;
        overflow-y: auto; /* Scrollable contents if viewport is shorter than content. */
        background-color: #f5f5f5;
        border-right: 1px solid #eee;
    }
}

/* Sidebar navigation */
.nav-sidebar {
    margin-right: -21px; /* 20px padding + 1px border */
    margin-bottom: 20px;
    margin-left: -20px;
}

    .nav-sidebar > li > a {
        padding-right: 20px;
        padding-left: 20px;
    }

    .nav-sidebar > .active > a,
    .nav-sidebar > .active > a:hover,
    .nav-sidebar > .active > a:focus {
        color: #fff;
        background-color: #428bca;
    }