@media screen and (max-width: 992px) {
    /* INDEX */
    #grid_body_index {
        display: grid;
        grid-template-columns: 100%;
        grid-template-rows: 4rem auto;
    }

    #grid_header {
        grid-column: 1 / 3;
        grid-row: 1 / 2;
    }

    #grid_main_index {
        grid-column: 1 / 3;
        grid-row: 2 / 3;
    }
    
    /* ALLE VIEWS (AUSSER INDEX) */
    #grid_body {
        display: grid;
        grid-template-columns: 100%;
        grid-template-rows: 4rem 2rem auto;
    }
    #grid_body.opened {
        grid-template-rows: 4rem auto auto;
    }

    #grid_sidebar {
        grid-column: 1 / 1;
        grid-row: 2 / 3;
    }

    #grid_main{
        grid-column: 1 / 1;
        grid-row: 3 / 4;

        overflow: auto;
    }

    /* Sidebar Menübutton einblenden */
    #toggle_sidebar {
        display: block;
    }

    /* Siedbar Navigationsmenü */
    #sidebar_menue{
        display: none;
    }
}