% ---------------------------------------------------------------
% Mapa de polos no plano-s  (recriação de "Polos de Malha Aberta")
% Bibliotecas (carregadas no chunk .qmd): arrows.meta
% ---------------------------------------------------------------
\begin{tikzpicture}[>=Latex, line width=0.8pt]

  % --- Grade ---
  \draw[help lines, gray!25] (-7,-2) grid[step=1] (1,2);

  % --- Eixos ---
  \draw[->, gray!60, dashed, line width=1pt] (-7,0) -- (1.5,0)
        node[right, black] {$\mathrm{Re}(s)$};
  \draw[->, gray!60, dashed, line width=1pt] (0,-2.3) -- (0,2.4)
        node[above, black] {$\mathrm{Im}(s)$};

  % --- Marcações ---
  \foreach \x in {-7,-6,-5,-4,-3,-2,-1,1}
    \draw (\x,0.07)--(\x,-0.07) node[below, font=\scriptsize, fill=white, inner sep=1pt]{$\x$};
  \foreach \y in {-2,-1,1,2}
    \draw (0.07,\y)--(-0.07,\y) node[left, font=\scriptsize]{$\y$};

  % --- Polos (x vermelho) ---
  \def\polo(#1,#2){%
    \draw[red, line width=2.2pt] (#1-0.13,#2-0.13)--(#1+0.13,#2+0.13);
    \draw[red, line width=2.2pt] (#1-0.13,#2+0.13)--(#1+0.13,#2-0.13);}
  \polo(-5.049,0)
  \polo(-0.643,0)
  \polo(-0.308,0)

  % --- Rótulos sem sobreposição ---
  \node[above, font=\small] at (-5.049,0.25) {$p_1=-5{,}049$};

  \node[above, font=\small] at (-2.2,1.1) {$p_2=-0{,}643$};
  \draw[gray!60] (-2.2,1.0) -- (-0.643,0.18);

  \node[above, font=\small] at (0.9,1.55) {$p_3=-0{,}308$};
  \draw[gray!60] (0.9,1.45) -- (-0.308,0.18);

  % --- Título ---
  \node[font=\bfseries] at (-3,2.85) {Polos de Malha Aberta};

\end{tikzpicture}