/**
 * CSS Variables & Theme System
 * Saudi Competitions Application
 */

:root {
  /* ===== Color Palette ===== */

  /* Primary Colors */
  --color-primary: #165B33;        /* Saudi Green */
  --color-primary-light: #1a7042;
  --color-primary-dark: #0f3d22;
  --color-primary-alpha: rgba(22, 91, 51, 0.1);

  /* Secondary Colors */
  --color-secondary: #DAA520;      /* Gold */
  --color-secondary-light: #e4b844;
  --color-secondary-dark: #b8860b;
  --color-secondary-alpha: rgba(218, 165, 32, 0.1);

  /* Neutral Colors */
  --color-white: #FFFFFF;
  --color-black: #000000;
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F5F5F5;
  --color-gray-200: #E0E0E0;
  --color-gray-300: #BDBDBD;
  --color-gray-400: #9E9E9E;
  --color-gray-500: #757575;
  --color-gray-600: #616161;
  --color-gray-700: #424242;
  --color-gray-800: #212121;
  --color-gray-900: #1A1A1A;

  /* Semantic Colors */
  --color-success: #4CAF50;
  --color-success-light: #81C784;
  --color-success-dark: #388E3C;
  --color-warning: #FF9800;
  --color-warning-light: #FFB74D;
  --color-warning-dark: #F57C00;
  --color-error: #F44336;
  --color-error-light: #E57373;
  --color-error-dark: #D32F2F;
  --color-info: #2196F3;
  --color-info-light: #64B5F6;
  --color-info-dark: #1976D2;

  /* Status Colors */
  --color-status-active: var(--color-success);
  --color-status-upcoming: var(--color-info);
  --color-status-expired: var(--color-gray-400);
  --color-status-pending: var(--color-warning);

  /* UI Colors */
  --color-surface: var(--color-white);
  --color-border: var(--color-gray-300);
  --color-text-primary: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-600);
  --color-text-tertiary: var(--color-gray-500);
  --color-background: var(--color-gray-50);

  /* ===== Typography ===== */

  /* Font Families */
  --font-arabic: 'Cairo', 'Tajawal', sans-serif;
  --font-latin: 'Inter', 'Roboto', sans-serif;
  --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Font Sizes (using clamp for responsive scaling) */
  --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 0.825rem + 0.25vw, 1rem);
  --font-size-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --font-size-md: clamp(1.125rem, 1.05rem + 0.35vw, 1.25rem);
  --font-size-lg: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --font-size-xl: clamp(1.5rem, 1.35rem + 0.75vw, 2rem);
  --font-size-2xl: clamp(2rem, 1.75rem + 1.25vw, 3rem);

  /* Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* ===== Spacing ===== */

  /* Base unit: 8px */
  --spacing-1: 0.25rem;   /* 4px */
  --spacing-2: 0.5rem;    /* 8px */
  --spacing-3: 0.75rem;   /* 12px */
  --spacing-4: 1rem;      /* 16px */
  --spacing-5: 1.25rem;   /* 20px */
  --spacing-6: 1.5rem;    /* 24px */
  --spacing-8: 2rem;      /* 32px */
  --spacing-10: 2.5rem;   /* 40px */
  --spacing-12: 3rem;     /* 48px */
  --spacing-16: 4rem;     /* 64px */
  --spacing-20: 5rem;     /* 80px */

  /* ===== Border Radius ===== */

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* ===== Shadows ===== */

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* ===== Z-Index Scale ===== */

  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-toast: 600;

  /* ===== Transitions ===== */

  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  --transition-slower: 500ms ease;

  /* ===== Layout ===== */

  --container-max-width: 1280px;
  --header-height: 64px;
  --sidebar-width: 280px;

  /* ===== Breakpoints (for reference in JavaScript) ===== */

  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
}

/* RTL Adjustments */
[dir="rtl"] {
  --text-align-start: right;
  --text-align-end: left;
}

[dir="ltr"] {
  --text-align-start: left;
  --text-align-end: right;
}