#tmp-browser-info #tmp-browser-info-chromium {
    display: block;
}

#tmp-browser-info #tmp-browser-info-internet-explorer-new {
    display: none;
}

#tmp-browser-info #tmp-browser-info-internet-explorer-old {
    display: none;
}

@supports (grid-template-columns: 205px auto 200px) {
    .main-header {
        grid-area: header;
    }
    
    .main-content {
        grid-area: content;
        display: table;
    }
    
    .main-menu {
        grid-area: navigation;
    }
    
    .main-themboxes {
        grid-area: sidebar;
    }
    
    .main-site-container {
        display: grid;
        grid-template-columns: 205px auto 200px;
        grid-template-areas:
            "header header header"
            "navigation content sidebar"
            "navigation content sidebar";
    }
    
    .main-menu ul {
        display: flex;
        flex-direction: column;
    }
}