/**
 * ETWhatsApp V2 Authoritative Semantic Design Tokens
 * Conforms to WCAG 2.2 AA accessibility and bidirectional (LTR/RTL) standards.
 */

:root {
  /* Brand Palettes - Navy Brand Transformation */
  --et-color-primary-50: #f0f4ff;
  --et-color-primary-100: #e0e9fe;
  --et-color-primary-200: #c7d2fe;
  --et-color-primary-300: #a5b4fc;
  --et-color-primary-400: #818cf8;
  --et-color-primary-500: #3b82f6;
  --et-color-primary-600: #172554;
  --et-color-primary-700: #1e3a8a;
  --et-color-primary-800: #1e40af;
  --et-color-primary-900: #0f172a;

  --et-color-platform-50: #f0f9ff;
  --et-color-platform-500: #0284c7;
  --et-color-platform-600: #0369a1;
  --et-color-platform-900: #0c4a6e;

  /* Neutrals */
  --et-color-neutral-50: #f8fafc;
  --et-color-neutral-100: #f1f5f9;
  --et-color-neutral-200: #e2e8f0;
  --et-color-neutral-300: #cbd5e1;
  --et-color-neutral-400: #94a3b8;
  --et-color-neutral-500: #64748b;
  --et-color-neutral-600: #475569;
  --et-color-neutral-700: #334155;
  --et-color-neutral-800: #1e293b;
  --et-color-neutral-900: #0f172a;

  /* Semantic Status Colors */
  --et-color-success-bg: #dcfce7;
  --et-color-success-text: #15803d;
  --et-color-success-border: #86efac;

  --et-color-warning-bg: #fef9c3;
  --et-color-warning-text: #854d0e;
  --et-color-warning-border: #fde047;

  --et-color-danger-bg: #fee2e2;
  --et-color-danger-text: #b91c1c;
  --et-color-danger-border: #fca5a5;

  --et-color-info-bg: #e0f2fe;
  --et-color-info-text: #0369a1;
  --et-color-info-border: #7dd3fc;

  --et-color-offline-bg: #f1f5f9;
  --et-color-offline-text: #475569;
  --et-color-offline-border: #cbd5e1;

  /* Typography Scales */
  --et-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --et-font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --et-text-xs: 0.75rem;
  --et-text-sm: 0.875rem;
  --et-text-base: 1rem;
  --et-text-lg: 1.125rem;
  --et-text-xl: 1.25rem;
  --et-text-2xl: 1.5rem;
  --et-text-3xl: 1.875rem;

  /* Spacing Grid (4px base) */
  --et-space-1: 0.25rem;
  --et-space-2: 0.5rem;
  --et-space-3: 0.75rem;
  --et-space-4: 1rem;
  --et-space-5: 1.25rem;
  --et-space-6: 1.5rem;
  --et-space-8: 2rem;
  --et-space-10: 2.5rem;
  --et-space-12: 3rem;

  /* Radii */
  --et-radius-sm: 4px;
  --et-radius-md: 6px;
  --et-radius-lg: 8px;
  --et-radius-xl: 12px;
  --et-radius-full: 9999px;

  /* Elevation */
  --et-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --et-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --et-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  /* Focus and Accessibility */
  --et-focus-ring-color: #3b82f6;
  --et-focus-ring-width: 2px;
  --et-focus-ring-offset: 2px;
  --et-focus-ring: 0 0 0 var(--et-focus-ring-offset) #ffffff, 0 0 0 calc(var(--et-focus-ring-offset) + var(--et-focus-ring-width)) var(--et-focus-ring-color);

  /* Motion & Transitions */
  --et-duration-fast: 150ms;
  --et-duration-normal: 250ms;
  --et-duration-slow: 350ms;
  --et-ease-standard: cubic-bezier(0.4, 0.0, 0.2, 1);
}

/* Reduced Motion Override for Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* RTL / Bidirectional helpers */
[dir="rtl"] {
  --et-direction: rtl;
}

[dir="ltr"] {
  --et-direction: ltr;
}