:root{--primary:#2563eb;--primary-hover:#1d4ed8;--bg-main:#f8fafc;--panel-bg:#fff;--text-main:#0f172a;--text-muted:#64748b;--border:#e2e8f0;--danger:#ef4444}*{box-sizing:border-box;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}body,#app{background:var(--bg-main);color:var(--text-main);flex-direction:column;width:100vw;height:100vh;display:flex;overflow:hidden}