/* FOG OF WAR's layer (army-stage.js paintFog, army-fog.js): the visibility grid a pixel a square, stretched over the
   square map's ground and moved with it (as #ground), under the field's canvas; smoothed by the browser. The 3D view
   has its own (a textured plane), so this one hides there. */
#fog { position: absolute; left: 0; top: 0; transform-origin: 0 0; will-change: transform; pointer-events: none; image-rendering: auto; }
#stage.rendering-3d #fog { visibility: hidden; }
body.battle-is-loading #stage #fog { visibility: hidden; }