/* ============================================
   DESIGN TOKENS - Career Intelligence Platform
   Premium, minimal, editorial aesthetic
   ============================================ */

:root {
  /* ===================
     COLOR SYSTEM
     =================== */
  
  /* Primary - Indigo (Calm, Professional, Trustworthy) */
  --color-primary-50: #EEF2FF;
  --color-primary-100: #E0E7FF;
  --color-primary-200: #C7D2FE;
  --color-primary-300: #A5B4FC;
  --color-primary-400: #818CF8;
  --color-primary-500: #6366F1;
  --color-primary-600: #4F46E5;
  --color-primary-700: #4338CA;
  --color-primary-800: #3730A3;
  --color-primary-900: #312E81;
  
  /* Neutral Greys */
  --color-neutral-50: #FAFAFA;
  --color-neutral-100: #F5F5F5;
  --color-neutral-200: #E5E5E5;
  --color-neutral-300: #D4D4D4;
  --color-neutral-400: #A3A3A3;
  --color-neutral-500: #737373;
  --color-neutral-600: #525252;
  --color-neutral-700: #404040;
  --color-neutral-800: #262626;
  --color-neutral-900: #171717;
  
  /* Semantic Colors */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  
  /* Background & Surface */
  --color-bg: #FFFFFF;
  --color-bg-subtle: #FAFAFA;
  --color-bg-muted: #F5F5F5;
  --color-surface: #FFFFFF;
  --color-surface-elevated: #FFFFFF;
  
  /* Text */
  --color-text-primary: #171717;
  --color-text-secondary: #525252;
  --color-text-muted: #737373;
  --color-text-inverse: #FFFFFF;
  
  /* Borders */
  --color-border: #E5E5E5;
  --color-border-subtle: #F5F5F5;
  
  /* ===================
     TYPOGRAPHY
     =================== */
  
  /* Font Families */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  
  /* Font Sizes - Fluid Scale */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */
  
  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Letter Spacing */
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  
  /* ===================
     SPACING - 8px Grid
     =================== */
  
  --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 */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */
  
  /* ===================
     LAYOUT
     =================== */
  
  --container-max: 1200px;
  --container-narrow: 720px;
  --container-wide: 1400px;
  --container-padding: var(--space-6);
  
  /* ===================
     BORDER RADIUS
     =================== */
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* ===================
     SHADOWS - Premium Depth
     =================== */
  
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.06), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  
  /* Colored shadows for premium elements */
  --shadow-primary: 0 4px 14px -2px rgba(79, 70, 229, 0.25);
  --shadow-primary-lg: 0 10px 30px -4px rgba(79, 70, 229, 0.3);
  
  /* ===================
     TRANSITIONS
     =================== */
  
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 350ms;
  --duration-slower: 500ms;
  
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* ===================
     Z-INDEX SCALE
     =================== */
  
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  
  /* ===================
     GRADIENTS
     =================== */
  
  --gradient-primary: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-700) 100%);
  --gradient-subtle: linear-gradient(180deg, var(--color-neutral-50) 0%, var(--color-bg) 100%);
  --gradient-radial: radial-gradient(ellipse at top, var(--color-primary-50) 0%, transparent 50%);
  --gradient-hero: linear-gradient(180deg, #EEF2FF 0%, #FFFFFF 60%);
}

/* Dark mode support (optional, can be enabled later) */
@media (prefers-color-scheme: dark) {
  :root.dark-mode {
    --color-bg: #0A0A0B;
    --color-bg-subtle: #111113;
    --color-bg-muted: #1A1A1D;
    --color-surface: #111113;
    --color-surface-elevated: #1A1A1D;
    --color-text-primary: #FAFAFA;
    --color-text-secondary: #A3A3A3;
    --color-text-muted: #737373;
    --color-border: #262626;
    --color-border-subtle: #1A1A1D;
  }
}