/* CSS Custom Properties (Variables) */
:root {
  /* Colors */
  --color-primary: #3b82f6;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #60a5fa;
  --color-secondary: #fbbf24;
  --color-secondary-dark: #f59e0b;
  --color-secondary-light: #fcd34d;
  
  /* Backgrounds */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-light: #f8fafc;
  --bg-light-secondary: #f1f5f9;
  --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  
  /* Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #1e293b;
  --text-tertiary: #334155;
  --text-muted: #475569;
  --text-light: #e2e8f0;
  --text-white: #ffffff;
  
  /* Typography */
  --font-primary: 'JetBrains Mono', 'Courier New', monospace;
  --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* 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-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  --font-size-6xl: 3.75rem;   /* 60px */
  --font-size-7xl: 4.5rem;    /* 72px */
  --font-size-8xl: 6rem;      /* 96px */
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  
  /* Line Heights */
  --line-height-none: 1;
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;
  
  /* Spacing */
  --spacing-px: 1px;
  --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 */
  --spacing-24: 6rem;      /* 96px */
  --spacing-32: 8rem;      /* 128px */
  --spacing-40: 10rem;     /* 160px */
  --spacing-48: 12rem;     /* 192px */
  --spacing-56: 14rem;     /* 224px */
  --spacing-64: 16rem;     /* 256px */
  
  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.125rem;    /* 2px */
  --radius-base: 0.25rem;   /* 4px */
  --radius-md: 0.375rem;    /* 6px */
  --radius-lg: 0.5rem;      /* 8px */
  --radius-xl: 0.75rem;     /* 12px */
  --radius-2xl: 1rem;       /* 16px */
  --radius-3xl: 1.5rem;     /* 24px */
  --radius-full: 9999px;
  
  /* Box Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  
  /* Custom Shadows */
  --shadow-glow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  --shadow-glow-secondary: 0 0 0 3px rgba(251, 191, 36, 0.1);
  --shadow-card: 0 25px 80px rgba(0, 0, 0, 0.1);
  --shadow-card-hover: 0 35px 100px rgba(0, 0, 0, 0.15);
  
  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-normal: 300ms ease-out;
  --transition-slow: 500ms ease-out;
  --transition-bounce: 300ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --transition-smooth: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
  
  /* Breakpoints */
  --breakpoint-xs: 480px;
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
  
  /* Container Widths */
  --container-xs: 20rem;      /* 320px */
  --container-sm: 30rem;      /* 480px */
  --container-md: 42rem;      /* 672px */
  --container-lg: 56rem;      /* 896px */
  --container-xl: 72rem;      /* 1152px */
  --container-2xl: 80rem;     /* 1280px */
  --container-full: 100%;
  
  /* Navigation */
  --nav-height: 56px;
  --nav-height-mobile: 50px;
  
  /* Animations */
  --animation-fade-in: fadeIn 0.3s ease-out;
  --animation-fade-out: fadeOut 0.3s ease-out;
  --animation-slide-in-up: slideInUp 0.4s ease-out;
  --animation-slide-in-down: slideInDown 0.4s ease-out;
  --animation-scale-in: scaleIn 0.3s ease-out;
  --animation-bounce-in: bounceIn 0.5s ease-out;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);
  --gradient-hero: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 50%, var(--color-secondary-dark) 100%);
  --gradient-text: linear-gradient(135deg, var(--text-white) 0%, var(--color-secondary) 100%);
  --gradient-bg-dark: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
  --gradient-bg-light: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-light-secondary) 100%);
  
  /* Backdrop Filters */
  --backdrop-blur-sm: blur(4px);
  --backdrop-blur-md: blur(12px);
  --backdrop-blur-lg: blur(20px);
  --backdrop-blur-xl: blur(25px);
  
  /* Focus Styles */
  --focus-ring: 0 0 0 2px var(--color-primary);
  --focus-ring-offset: 0 0 0 2px var(--text-white), 0 0 0 4px var(--color-primary);
}