/* ============================================================ AR Player Controls Bar — Card A Auto-hide bottom bar, MUI-style fade transition. ============================================================ */ /* v60 CANVAS STYLING: Three.js renderer.domElement appended to body has no default size/position. On desktop, the canvas would render at default 300x150px and sit in document flow (NOT visible because is black). On Quest 3 (XR session), the canvas displays the stereo video domes — visible and full-screen. v60 default: HIDE the canvas on desktop (display:none), show only when XR session is active (body.xr-mode class added by player.js). On desktop, the user sees the