:root {
  /* Cores de Painel específicas para o ambiente de laboratório */
  --lab-bg: #1e1e1e;
  --lab-panel-bg: #2d2d2d;
  --lab-text: #e0e0e0;
  --lab-accent: #3b82f6;
  --lab-border: #444;
  --lab-success: #10b981;
  --lab-error: #ef4444;
  --lab-warning: #f59e0b;
}

body.lab-mode {
  background-color: var(--lab-bg);
  color: var(--lab-text);
  margin: 0;
  padding: 0;
  overflow: hidden; /* App fullscreen mode */
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}