gohugoio-hugo/docs/static/css/style-responsive.css

@media (max-width: 768px) {

    .header {
        position: absolute;
    }

    /*sidebar*/

    #sidebar {
        height: auto;
        overflow: hidden;
        position: absolute;
        width: 100%;
        z-index: 1001;
    }


    /* body container */
    #main-content {
        margin: 0px!important;
        position: none !important;
    }

    .wrapper {
        padding: inherit;
    }

    #sidebar > ul > li {
        margin: 0 10px 5px 10px;
    }
    #sidebar > ul > li > a {
        height:35px;
        line-height:35px;
        padding: 0 10px;
        text-align: left;
    }

    #sidebar > ul > li > a, #sidebar > ul > li > ul.sub > li {
        width: 100%;
    }
    #sidebar > ul > li > ul.sub > li > a {
        background: transparent !important ;
    }

    /* sidebar */
    #sidebar {
        margin: 0px !important;
    }

    .btn {
        margin-bottom: 5px;
    }

    .navigation.next {
        display: none;
    }

}

@media (max-width: 480px) {

    .notification-row {
        display: none;
    }
}

@media (max-width:360px) {

    h1 {
        font-size: 1.9em;
    }
}