:root {
    --theme-windowpane-color-edge: #222;
    --theme-windowpane-color-1: #ff5599;
    --theme-windowpane-color-2: #ffb172;
    --theme-windowpane-color-3: #37c8ab;
    --theme-windowpane-color-4: #6d6de7;
}
.windowpane-cell {
    fill: #ccc;
    stroke: #bbb;
    stroke-width: 2pt;
}
.windowpane-tile-selected {
    filter: drop-shadow(4px 4px 4px #000c);
    -webkit-filter: drop-shadow(4px 4px 4px #000c);
    stroke: white;
    stroke-width: 4pt;
}
.theme-dark .windowpane-cell {
    fill: #555;
    stroke: #666;
}
.theme-dark .windowpane-tile-selected {
    stroke: white;
}