#page {
    height: 100%;
    
    display: grid;
    grid-template-areas: 'header header header' 'header-line header-line header-line' 'tabpages rightdragbar rightcol' 'footer footer footer';
    grid-template-rows: min-content 1.3px 1fr;
    grid-template-columns: 3fr 6px 1fr;
}

/*****************************/

#header {
    
    overflow: auto;
    grid-area: header;
}

#header-line {
    overflow: auto;
    grid-area: header-line;
    background-color: #6093CA;
}


#tabs {
    overflow: auto;
    grid-area: tabs;
}

#mapcontainer {
    overflow: auto;
    grid-area: tabpages;
    
}

#rightdragbar {
    background:linear-gradient(0.25turn, #6B9ACB, #fff, #6093CA, #fff, #6B9ACB);
    grid-area: rightdragbar;
    cursor: ew-resize;
}

#rightcol {
    
    overflow: auto;
    grid-area: rightcol;
}

#footer {
    
    overflow: auto;
    grid-area: footer;
}