body { margin:0; background:#1E293B; font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; }
#loading { position:fixed; inset:0; display:flex; flex-direction:column; align-items:center; justify-content:center; background:#1E293B; color:#fff; z-index:9999; transition:opacity 0.3s; }
#loading.hidden { opacity:0; pointer-events:none; }
.spinner { width:48px; height:48px; border:3px solid rgba(255,255,255,0.2); border-top-color:#fff; border-radius:50%; animation:spin 0.8s linear infinite; margin-bottom:20px; }
@keyframes spin { to { transform:rotate(360deg); } }
#loading p { font-size:16px; color:rgba(255,255,255,0.7); margin:0; }
.error-popup { display:none; position:fixed; bottom:20px; left:20px; right:20px; max-height:80vh; overflow-y:auto; background:#dc2626; color:#fff; padding:16px 36px 16px 16px; border-radius:8px; z-index:9999; font-size:13px; font-family:monospace; white-space:pre-wrap; word-break:break-all; cursor:pointer; }
.error-popup::after { content:'×'; position:absolute; top:8px; right:12px; font-size:18px; line-height:1; font-family:sans-serif; }