/* ═══════════════════════════════════════════════════════════════
   WebGL visual-layer mount — added by the 3D integration.
   See PLUNDER-INTEGRATION-PLAN.md for the full plan.

   Positions the three.js canvas (#webgl-stage, mounted by webgl-scene.js)
   to fill the #stage box. The old 2D scene layer (nightbg.js, scene.js,
   the #bg/#sea/#fx/.lane elements they drove) has been removed entirely —
   it was superseded by this WebGL scene and had been running fully hidden
   (and, for scene.js, still doing per-event DOM/canvas work for zero
   visible pixels) ever since.
   ═══════════════════════════════════════════════════════════════ */

#webgl-stage {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    display: block;
}