/* ===================================
   INNOVATIVE SKILLS - DESIGN TOKENS
   Premium Dark Theme Portfolio
   =================================== */

:root {
  /* ===== COLOR PALETTE ===== */
  
  /* Background Colors */
  --bg-primary: #0a0f1c;
  --bg-secondary: #111827;
  --bg-tertiary: #1a2332;
  --bg-card: #151d2e;
  --bg-card-hover: #1e2a3f;
  
  /* Accent Colors - Gradient Base */
  --accent-cyan: #06b6d4;
  --accent-purple: #8b5cf6;
  --accent-blue: #3b82f6;
  --accent-green: #10b981;
  --accent-pink: #ec4899;
  
  /* Gradient Definitions */
  --gradient-primary: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
  --gradient-accent: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-pink) 100%);
  --gradient-glow: radial-gradient(circle at center, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
  
  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: var(--accent-cyan);
  
  /* Border & Divider */
  --border-subtle: rgba(148, 163, 184, 0.1);
  --border-strong: rgba(148, 163, 184, 0.2);
  --border-accent: rgba(6, 182, 212, 0.3);
  
  /* Status Colors */
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  
  /* ===== TYPOGRAPHY ===== */
  
  /* Font Families */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Outfit', var(--font-primary);
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Font Sizes - Fluid Scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --text-base: clamp(1rem, 0.925rem + 0.375vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.375rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.625rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2.25rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 3rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 4rem);
  --text-5xl: clamp(3rem, 2rem + 5vw, 6rem);
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Line Heights */
  --leading-tight: 1.2;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  
  /* Letter Spacing */
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  
  /* ===== SPACING ===== */
  
  --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 */
  
  /* Section Spacing */
  --section-padding: clamp(4rem, 8vw, 8rem);
  --container-padding: clamp(1rem, 5vw, 2rem);
  
  /* ===== LAYOUT ===== */
  
  --container-max: 1280px;
  --container-narrow: 800px;
  --container-wide: 1440px;
  
  /* ===== BORDERS & RADIUS ===== */
  
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* ===== SHADOWS ===== */
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  
  /* Glow Shadows */
  --glow-cyan: 0 0 20px rgba(6, 182, 212, 0.3), 0 0 40px rgba(6, 182, 212, 0.1);
  --glow-purple: 0 0 20px rgba(139, 92, 246, 0.3), 0 0 40px rgba(139, 92, 246, 0.1);
  --glow-subtle: 0 0 30px rgba(6, 182, 212, 0.1);
  
  /* ===== TRANSITIONS ===== */
  
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
  --duration-slower: 600ms;
  
  --transition-base: var(--duration-normal) var(--ease-out);
  --transition-fast: var(--duration-fast) var(--ease-out);
  --transition-slow: var(--duration-slow) var(--ease-out);
  
  /* ===== Z-INDEX ===== */
  
  --z-below: -1;
  --z-base: 0;
  --z-above: 10;
  --z-sticky: 100;
  --z-fixed: 500;
  --z-overlay: 1000;
  --z-modal: 1100;
  --z-toast: 1200;
}