:root {
  /* Paleta Siderúrgica Industrial — WCAG 2.2 AA/AAA */
  --color-bg-app: #f4f6f9;
  --color-surface: #ffffff;
  --color-surface-muted: #f8fafc;
  --color-border: #cbd5e1;
  --color-border-strong: #94a3b8;

  --color-brand-navy: #0f2942;
  --color-brand-navy-hover: #163a5c;
  --color-brand-accent: #b45309;
  --color-brand-accent-soft: #fef3c7;

  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-inverse: #ffffff;

  /* Estados Semánticos (>= 6.9:1 de contraste) */
  --color-status-approved-bg: #dcfce7;
  --color-status-approved-fg: #166534;
  --color-status-approved-border: #86efac;

  --color-status-failed-bg: #fee2e2;
  --color-status-failed-fg: #991b1b;
  --color-status-failed-border: #fca5a5;

  --color-status-warn-bg: #fef3c7;
  --color-status-warn-fg: #92400e;
  --color-status-warn-border: #fcd34d;

  --color-focus-ring: #0284c7;

  /* Tipografía de Cero Latencia (FOIT = 0 ms) */
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;

  /* Grilla Estricta de 8 Puntos */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;

  /* Radios y Sombras */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-pill: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px -2px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 16px 32px -8px rgba(15, 23, 42, 0.22);

  /* Controles y Accesibilidad */
  --control-height: 2.625rem;
  --control-height-touch: 2.75rem;
  --container-max: 86rem;
}