:root{
  --font-sans: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;

  /* Color system (sobrio, institucional) */
  --primary-900:#033A4F;
  --primary-800:#0b4f6c;
  --primary-700:#0f6c8f;

  --accent-600:#027BAE;
  --accent-500:#39C0ED;

  --bg:#f4f6f9;
  --surface:#ffffff;

  --text:#111827;
  --muted:#6b7280;

  --border:#e5e7eb;

  /* Radius, shadow, spacing */
  --radius-lg: 18px;
  --radius-md: 14px;

  --shadow-sm: 0 4px 12px rgba(0,0,0,.08);
  --shadow-md: 0 12px 30px rgba(0,0,0,.12);

  --focus: 0 0 0 .2rem rgba(2, 123, 174, .25);
}