/* ============================================
   CSS Variables - Design System Tokens
   ============================================ */

   
:root {
  /* ========== Color System ========== */
  
  /* Primary Colors */
  --color-background: #0b0f19;
  --color-primary: #4f46e5;
  --color-accent: #22c55e;
  --color-text: #e5e7eb;
  
  --color-background: #021132;
  --color-primary: #3B82F6;       /* Azul Eléctrico (estilo Azure/IBM) */
  --color-accent: #60A5FA;        /* Azul claro para detalles */
  --color-text: #E2E8F0;
  
  /* Semantic Colors */
  --color-text-primary: #f9fafb;
  --color-text-secondary: #d1d5db;
  --color-text-muted: #9ca3af;
  
  /* Surface Colors */
  --color-surface: #1a1f2e;
  --color-surface-icon: #151b27;
  --color-surface-elevated: #242938;
  --color-border: #374151;
  
  /* State Colors */
  --color-hover: #5b52f0;
  --color-active: #4338ca;
  --color-focus: #6366f1;
  
  /* Utility Colors */
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  
  /* ========== Typography ========== */
  
  /* Font Families */
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-code: 'JetBrains Mono', 'Courier New', monospace;
  
  /* Font Sizes */
  --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 */
  --text-7xl: 4.5rem;      /* 72px */
  
  /* Font Weights */
  --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;
  
  /* ========== Spacing Scale ========== */
  
  /* Spacing (4px base unit) */
  --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 */
  
  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
  
  /* ========== Border & Radius ========== */
  
  /* Border Radius */
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-2xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;
  
  /* Border Width */
  --border-width: 1px;
  --border-width-2: 2px;
  --border-width-4: 4px;
  
  /* ========== Shadows ========== */
  
  /* 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);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Glow Effects */
  --glow-primary: 0 0 20px rgba(79, 70, 229, 0.3);
  --glow-accent: 0 0 20px rgba(34, 197, 94, 0.3);
  
  /* ========== Transitions ========== */
  
  /* Transition Durations */
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 350ms;
  
  /* Transition Timing Functions */
  --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);
  
  /* Common Transitions */
  --transition-colors: color var(--duration-base) var(--ease-in-out),
                       background-color var(--duration-base) var(--ease-in-out),
                       border-color var(--duration-base) var(--ease-in-out);
  --transition-transform: transform var(--duration-base) var(--ease-in-out);
  --transition-opacity: opacity var(--duration-base) var(--ease-in-out);
  --transition-all: all var(--duration-base) var(--ease-in-out);
  
  /* ========== Z-Index Scale ========== */
  
  /* Z-Index Layers */
  --z-base: 0;
  --z-dropdown: 1000;
  --z-sticky: 1100;
  --z-fixed: 1200;
  --z-modal-backdrop: 1300;
  --z-modal: 1400;
  --z-popover: 1500;
  --z-tooltip: 1600;
}

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

@media (max-width: 640px) {
  :root {
    --text-5xl: 2.5rem;    /* 40px on mobile */
    --text-6xl: 3rem;      /* 48px on mobile */
    --text-7xl: 3.5rem;    /* 56px on mobile */
  }
}