/**
 * Design Tokens - MeqiasY Height Comparison App
 * Modern, RTL-friendly design system
 */

/* ============================================
   COLOR PALETTE
   ============================================ */

:root {
  /* Primary Colors */
  --color-primary: #03ADCC;
  --color-primary-hover: #0288A3;
  --color-primary-light: #E3F2FD;
  
  /* Secondary/Accent Colors */
  --color-secondary: #fab92e;
  --color-secondary-hover: #e5a625;
  
  /* Neutral Colors */
  --color-background: #f8f9fa;
  --color-surface: #ffffff;
  --color-surface-alt: #f2f2f2;
  
  /* Text Colors */
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #6b7280;
  --color-text-muted: #9ca3af;
  --color-text-on-primary: #ffffff;
  --color-text-on-surface: #333333;
  
  /* Border Colors */
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;
  --color-border-focus: #03ADCC;
  
  /* Status Colors */
  --color-danger: #ef4444;
  --color-danger-hover: #dc2626;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  
  /* Shadow Colors */
  --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);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

:root {
  /* Font Families */
  --font-family-arabic: 'Cairo', 'Tajawal', 'IBM Plex Sans Arabic', sans-serif;
  --font-family-base: var(--font-family-arabic);
  
  /* 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 */
  --font-size-3xl: 1.875rem;    /* 30px */
  
  /* 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;
  
  /* Letter Spacing */
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;
}

/* ============================================
   SPACING SCALE
   ============================================ */

:root {
  --spacing-0: 0;
  --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
   ============================================ */

:root {
  --radius-none: 0;
  --radius-sm: 0.25rem;    /* 4px */
  --radius-md: 0.375rem;   /* 6px */
  --radius-lg: 0.5rem;     /* 8px */
  --radius-xl: 0.75rem;    /* 12px */
  --radius-2xl: 1rem;      /* 16px */
  --radius-full: 9999px;
}

/* ============================================
   TRANSITIONS
   ============================================ */

:root {
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  --transition-slower: 500ms ease-in-out;
}

/* ============================================
   Z-INDEX SCALE
   ============================================ */

:root {
  --z-index-dropdown: 100;
  --z-index-sticky: 200;
  --z-index-fixed: 300;
  --z-index-modal-backdrop: 400;
  --z-index-modal: 500;
  --z-index-popover: 600;
  --z-index-tooltip: 700;
}

/* ============================================
   BREAKPOINTS
   ============================================ */

:root {
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* ============================================
   COMPONENT-SPECIFIC TOKENS
   ============================================ */

:root {
  /* Button */
  --btn-height-sm: 2.25rem;    /* 36px */
  --btn-height-md: 2.75rem;    /* 44px */
  --btn-height-lg: 3rem;       /* 48px */
  --btn-padding-x: var(--spacing-4);
  --btn-padding-y: var(--spacing-3);
  
  /* Input */
  --input-height-sm: 2.25rem;   /* 36px */
  --input-height-md: 2.75rem;   /* 44px */
  --input-height-lg: 3rem;      /* 48px */
  --input-padding-x: var(--spacing-4);
  --input-padding-y: var(--spacing-3);
  --input-border-width: 1px;
  
  /* Card */
  --card-padding: var(--spacing-6);
  --card-border-radius: var(--radius-xl);
  
  /* Grid */
  --grid-line-major-color: #00000036;
  --grid-line-major-width: 2px;
  --grid-line-minor-color: #00000037;
  --grid-line-minor-width: 1px;
  --grid-tick-major-height: 12px;
  --grid-tick-minor-height: 6px;
  --grid-label-font-size: var(--font-size-sm);
  
  /* Sidebar/Form Card */
  --sidebar-width: 320px;
  --sidebar-padding: var(--spacing-6);
  --sidebar-background: var(--color-surface);
  
  /* Person Marker */
  --marker-width: 100px;
  --marker-label-height: 50px;
  --marker-label-max-width: 180px;
}

/* ============================================
   RTL-SPECIFIC TOKENS
   ============================================ */

[dir="rtl"] {
  --text-align-start: right;
  --text-align-end: left;
  --margin-inline-start: margin-right;
  --margin-inline-end: margin-left;
  --padding-inline-start: padding-right;
  --padding-inline-end: padding-left;
  --border-inline-start: border-right;
  --border-inline-end: border-left;
}

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

/* ============================================
   DARK MODE SUPPORT (Future)
   ============================================ */

@media (prefers-color-scheme: dark) {
  :root {
    /* Can be uncommented when dark mode is implemented
    --color-background: #111827;
    --color-surface: #1f2937;
    --color-text-primary: #f9fafb;
    --color-text-secondary: #d1d5db;
    --color-border: #374151;
    */
  }
}