:root{--bg: #0a0e14;--bg2: #131920;--bg3: #1a2028;--border: #2a323d;--text: #e6e6e6;--muted: #8a919b;--axial: #00d4aa;--sagittal: #ff6b9d;--coronal: #7c5cff;--xr: #f59e0b}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;height:100%;overflow:hidden;font-family:system-ui,Segoe UI,sans-serif;background:var(--bg);color:var(--text)}@keyframes spin{to{transform:rotate(360deg)}}.spinner{width:44px;height:44px;border-radius:50%;border:3px solid var(--border);border-top-color:var(--axial);animation:spin 1s linear infinite}#overlay,#xr-overlay{position:fixed;inset:0;background:#0a0e14f2;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;z-index:100;transition:opacity .3s}#xr-overlay{gap:18px;z-index:300;transition:opacity .35s}#overlay.hidden,#xr-overlay.hidden{opacity:0;pointer-events:none}#progress{font-size:12px;color:var(--axial)}#xr-progress{font-size:13px;color:var(--axial);max-width:300px;text-align:center}.error{color:#ef4444;font-size:13px;padding:16px;text-align:center}