:root[data-theme=light]{--bg-main:#f8fafc;--bg-card:#fff;--border-color:#e2e8f0;--text-main:#1e293b;--text-muted:#64748b;--primary-blue:#3b82f6;--primary-green:#10b981;--primary-red:#ef4444;--primary-yellow:#f59e0b}:root[data-theme=dark]{--bg-main:#0f172a;--bg-card:#1e293b;--border-color:#334155;--text-main:#f8fafc;--text-muted:#94a3b8;--primary-blue:#3b82f6;--primary-green:#10b981;--primary-red:#ef4444;--primary-yellow:#f59e0b}body{background-color:var(--bg-main);color:var(--text-main);margin:0;transition:background-color .4s,color .4s}