/*
 * VistexDataCenter Design System Variables
 * CRITICAL: This file MUST load first in _Layout.cshtml
 * Version: 1.0
 * Created: 2025-12-26
 */

:root {
  /* ========== PRIMARY BRAND COLORS ========== */
  --color-primary: #4CA7BB;
  --color-primary-hover: #3D8A9A;
  --color-primary-light: #E8F4F7;

  /* ========== SECONDARY COLORS ========== */
  --color-secondary: #BBBDC2;
  --color-secondary-hover: #9EA0A5;

  /* ========== SEMANTIC STATUS COLORS ========== */
  /* Standard (for buttons, alerts) */
  --color-success: #10B981;
  --color-success-hover: #059669;
  --color-success-light: #D1FAE5;
  --color-danger: #EF4444;
  --color-danger-hover: #DC2626;
  --color-danger-light: #FEE2E2;
  --color-warning: #F59E0B;
  --color-warning-hover: #D97706;
  --color-warning-light: #FEF3C7;
  --color-info: #3B82F6;
  --color-info-hover: #2563EB;
  --color-info-light: #DBEAFE;

  /* Soft variants (for indicators, badges - less harsh) */
  --color-success-soft: #34D399;
  --color-danger-soft: #F87171;
  --color-warning-soft: #FBBF24;
  --color-info-soft: #60A5FA;

  /* ========== NEUTRAL GRAYSCALE ========== */
  --color-white: #FFFFFF;
  --color-white-50: rgba(255, 255, 255, 0.5);
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;
  --bg-primary: #FFFFFF;
  --bg-secondary: #F9FAFB;
  --bg-tertiary: #F3F4F6;
  --text-primary: #111827;
  --text-secondary: #6B7280;
  --text-tertiary: #9CA3AF;
  --text-inverse: #FFFFFF;
  --border-primary: #E5E7EB;
  --border-secondary: #D1D5DB;
  --border-dark: #374151;
  --border-focus: #4CA7BB;

  /* ========== SPACING SCALE (4px base) ========== */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */

  /* ========== FONT SIZES ========== */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */

  /* ========== BORDER RADIUS ========== */
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.375rem;  /* 6px */
  --radius-lg: 0.5rem;    /* 8px */
  --radius-xl: 0.75rem;   /* 12px */
  --radius-full: 9999px;

  /* ========== SHADOWS ========== */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
  --shadow-focus: 0 0 0 3px rgba(76, 167, 187, 0.4);

  /* ========== TRANSITIONS ========== */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* ========== Z-INDEX SCALE ========== */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* ========== ACCESSIBILITY - REDUCED MOTION ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ========== ACCESSIBILITY - FOCUS STATES ========== */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* ========== HIGH CONTRAST MODE SUPPORT ========== */
@media (prefers-contrast: high) {
  :root {
    --border-primary: #000000;
    --border-secondary: #000000;
  }
}