html, body {
    margin: 0;
    padding: 0;
    height: 100%;
}

#main div {
    border: 1px solid;
    padding: 5px;
    background: #FFF;
}


#main {
    display: -webkit-box;
    display: -moz-box;
    display: box;
    -webkit-box-orient: horizontal;
    -moz-box-orient: horizontal;
    box-orient: horizontal;
    width: 100%;
    height: 100%;
}

div#toolbox {
    display: -webkit-box;
    display: -moz-box;
    display: box;
    -webkit-box-orient: vertical;
    -moz-box-orient: vertical;
    box-orient: vertical;
    width: 200px;
    background: #CCC;
}
#toolbox .tree {
    -webkit-box-flex: 1;
    -moz-box-flex: 1;
    box-flex: 1;
}

div#canvas {
    -webkit-box-flex: 1;
    -moz-box-flex: 1;
    box-flex: 1;
    background: #EEE;
}

div#structure {
    display: -webkit-box;
    display: -moz-box;
    display: box;
    -webkit-box-orient: vertical;
    -moz-box-orient: vertical;
    box-orient: vertical;
    width: 300px;
    background: #CCC;
}
#structure .inspector {
    -webkit-box-flex: 2;
    -moz-box-flex: 2;
    box-flex: 2;
}
#structure .config {
    -webkit-box-flex: 3;
    -moz-box-flex: 3;
    box-flex: 3;
}