:root
{
    --page-bck-color: rgb(86, 116, 146);
    --appborder-color: #ccc;
    --page-text-color: #eaeaea;
    --treeview-title-color: rgb(65, 88, 121);
    --treeview-text-color: #555;
    --item-hover-color: rgb(135, 179, 237);
}

body
{
    margin: 10px 40px 0px 40px;
    padding: 0;
    border: 0;
    font-family: sans-serif;
    line-height: 1.35;
    font-size: 16px;
    color:var(--page-text-color);
    background-color: var(--page-bck-color);
}

h1
{ color: var(--page-text-color); }

h2 
{ color: var(--treeview-title-color); }

a, a:link, a:visited, a:active 
{ color: var(--page-text-color); }

a:hover
{ color: var(--item-hover-color); }

#GridContainer
{
    display: grid; 
    height: 100%; 
    width: 100%;
    grid-gap: 20px 25px;
    grid-template-columns: [cl0] 0px [cl1] 1.25fr [cl2] 1fr [cl3] 1fr [cl4] 0px [cl5];
    grid-template-rows:  [rl0] 80px [rl1] 1fr [rl2] 22px [rl3] 200px [rl4] 22px [rl5] 200px [rl6] 20px [rl7];
}

#TitleBar
{
    grid-column: cl0 / cl2; 
    grid-row: rl0 / rl2;
    background-image: url("../img/explore-logo.gif");
    background-repeat: no-repeat;
    background-size: contain;
}

#TextBody
{
    grid-column: cl2 / cl5; 
    grid-row: rl0 / rl2; 
    padding: 6px 0px 0px 0px;
}

#OceanBox
{
    grid-column: cl0 / cl2; 
    grid-row: rl2 / rl6; 
    background-image: url("../img/ocean.jpg");
    background-size: auto 100%;
    border:solid var(--appborder-color) 1px;
}

#OceanTitle
{
    grid-column: cl0 / cl2; 
    grid-row: rl2 / rl3; 
}

#OceanTree
{
    grid-column: cl0 / cl2; 
    grid-row: rl3 / rl6; 
}

#AtmosBox
{
    grid-column: cl2 / cl3; 
    grid-row: rl2 / rl4; 
    background-image: url("../img/atmos.jpg");
    background-repeat: no-repeat;
    background-size: 100% 100%;
    border:solid var(--appborder-color) 1px;
}

#AtmosTitle
{
    grid-column: cl2 / cl3; 
    grid-row: rl2 / rl3; 
}

#AtmosTree
{
    grid-column: cl2 / cl3; 
    grid-row: rl3 / rl4; 
}

#IceBox
{
    grid-column: cl3 / cl5; 
    grid-row: rl2 / rl4; 
    background-image: url("../img/ice.jpg");
    background-repeat: no-repeat;
    background-size: 100% 100%;
    border:solid var(--appborder-color) 1px;
}

#IceTitle
{
    grid-column: cl3 / cl5; 
    grid-row: rl2 / rl3; 
}

#IceTree
{
    grid-column: cl3 / cl5; 
    grid-row: rl3 / rl4; 
}

#SedimentBox
{
    grid-column: cl3 / cl5; 
    grid-row: rl4 / rl6; 
    background-image: url("../img/sedim.jpg");
    background-repeat: no-repeat;
    background-size: 100% 100%;
    border:solid var(--appborder-color) 1px;
}

#SedimentTitle
{
    grid-column: cl3 / cl5; 
    grid-row: rl4 / rl5; 
}

#SedimentTree
{
    grid-column: cl3 / cl5; 
    grid-row: rl5 / rl6; 
}

#RiversBox
{
    grid-column: cl2 / cl3; 
    grid-row: rl4 / rl6; 
    background-image: url("../img/rivers.jpg");
    background-repeat: no-repeat;
    background-size: 100% 100%;
    border:solid var(--appborder-color) 1px;
}

#RiversTitle
{
    grid-column: cl2 / cl3; 
    grid-row: rl4 / rl5; 
}

#RiversTree
{
    grid-column: cl2 / cl3; 
    grid-row: rl5 / rl6; 
}

#StatusBar
{
    grid-column: cl0 / cl5; 
    grid-row: rl6 / rl7; 
    font-size: 14px;
}


/**** trees ****/

.TreeViewBox
{
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.5);
}

.TreeTitle
{
    font-size: 16px;
    padding: 0px 0px 16px 16px;
    margin: -12px 0px 0px 0px;
}

.TreeViewDiv
{
    overflow-y: auto;
}

.TreeView
{
    font-size: 16px;
    color:var(--treeview-text-color);
    -padding: 0px 0px 0px 0px;
    margin: 0px 0px 0px -14px;
}

.TreeView li
{
    padding: 3px 0 3px 0;
    cursor: pointer; 
}

.TreeView, .tree-nested-list
{
    list-style-type: none;
}

.TreeView li.tree-item-node
{
    font-style: italic;
}

.TreeView li.tree-item-node:hover
{
    color: var(--treeview-title-color);
}

.tree-group-node
{
    font-weight: bold;
    cursor: pointer; 
    user-select: none;
}

.tree-group-node::before
{
    display: inline-block;
    content: "\203A";
    margin-right: 6px;
}

.tree-group-node-open::before
{
    transform: rotate(90deg); 
}

.tree-item-node
{
    margin-right: 10px;
    cursor: pointer; 
}

.tree-nested-list
{
    display: none;
}

.tree-nested-list-open
{
    margin-left: -20px;
    display: block;
}