/* ==========================================================================
   CSS Variables - Sokrat Development
   Modern Design System with Dark/Light Theme Support
   ========================================================================== */

:root {
    /* ===== Color Palette ===== */
    
    /* Primary Colors - Electric Blue/Purple Gradient */
    --primary-100: #e0e7ff;
    --primary-200: #c7d2fe;
    --primary-300: #a5b4fc;
    --primary-400: #818cf8;
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --primary-800: #3730a3;
    --primary-900: #312e81;
    
    /* Accent Colors - Cyan/Teal */
    --accent-100: #cffafe;
    --accent-200: #a5f3fc;
    --accent-300: #67e8f9;
    --accent-400: #22d3ee;
    --accent-500: #06b6d4;
    --accent-600: #0891b2;
    --accent-700: #0e7490;
    --accent-800: #155e75;
    --accent-900: #164e63;
    
    /* Secondary Colors - Pink/Magenta */
    --secondary-100: #fce7f3;
    --secondary-200: #fbcfe8;
    --secondary-300: #f9a8d4;
    --secondary-400: #f472b6;
    --secondary-500: #ec4899;
    --secondary-600: #db2777;
    --secondary-700: #be185d;
    --secondary-800: #9d174d;
    --secondary-900: #831843;
    
    /* Success, Warning, Error */
    --success-500: #22c55e;
    --success-600: #16a34a;
    --warning-500: #f59e0b;
    --warning-600: #d97706;
    --error-500: #ef4444;
    --error-600: #dc2626;
    
    /* ===== Gradients ===== */
    --gradient-primary: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-500) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--secondary-500) 0%, var(--primary-500) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent-400) 0%, var(--primary-400) 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --gradient-glow: linear-gradient(135deg, rgba(99, 102, 241, 0.5) 0%, rgba(6, 182, 212, 0.5) 100%);
    --gradient-text: linear-gradient(135deg, var(--primary-400) 0%, var(--accent-400) 50%, var(--secondary-400) 100%);
    
    /* ===== Typography ===== */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Space Grotesk', var(--font-primary);
    --font-mono: 'Fira Code', 'Consolas', monospace;
    
    /* Font Sizes - Fluid Typography */
    --fs-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --fs-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
    --fs-base: clamp(1rem, 0.925rem + 0.375vw, 1.125rem);
    --fs-lg: clamp(1.125rem, 1rem + 0.625vw, 1.375rem);
    --fs-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.625rem);
    --fs-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2.25rem);
    --fs-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 3rem);
    --fs-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 4rem);
    --fs-5xl: clamp(3rem, 2.25rem + 3.75vw, 5.5rem);
    --fs-6xl: clamp(3.75rem, 2.75rem + 5vw, 7rem);
    
    /* Font Weights */
    --fw-light: 300;
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    --fw-extrabold: 800;
    --fw-black: 900;
    
    /* Line Heights */
    --lh-none: 1;
    --lh-tight: 1.25;
    --lh-snug: 1.375;
    --lh-normal: 1.5;
    --lh-relaxed: 1.625;
    --lh-loose: 2;
    
    /* Letter Spacing */
    --ls-tighter: -0.05em;
    --ls-tight: -0.025em;
    --ls-normal: 0;
    --ls-wide: 0.025em;
    --ls-wider: 0.05em;
    --ls-widest: 0.1em;
    
    /* ===== 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 */
    
    /* ===== Borders ===== */
    --radius-none: 0;
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
    --radius-full: 9999px;
    
    --border-width: 1px;
    --border-width-2: 2px;
    --border-width-4: 4px;
    
    /* ===== Shadows ===== */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);
    
    /* Glow Shadows */
    --glow-primary: 0 0 20px rgba(99, 102, 241, 0.5), 0 0 40px rgba(99, 102, 241, 0.3);
    --glow-accent: 0 0 20px rgba(6, 182, 212, 0.5), 0 0 40px rgba(6, 182, 212, 0.3);
    --glow-secondary: 0 0 20px rgba(236, 72, 153, 0.5), 0 0 40px rgba(236, 72, 153, 0.3);
    
    /* ===== Transitions ===== */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-slower: 500ms ease;
    --transition-slowest: 700ms ease;
    
    /* Easing Functions */
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-elastic: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* ===== Z-Index Scale ===== */
    --z-negative: -1;
    --z-0: 0;
    --z-10: 10;
    --z-20: 20;
    --z-30: 30;
    --z-40: 40;
    --z-50: 50;
    --z-60: 60;
    --z-70: 70;
    --z-80: 80;
    --z-90: 90;
    --z-max: 9999;
    
    /* ===== Layout ===== */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
    
    --nav-height: 80px;
    --nav-height-scrolled: 70px;
    
    /* ===== Dark Theme (Default) ===== */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: rgba(26, 26, 37, 0.8);
    --bg-card-hover: rgba(30, 30, 45, 0.9);
    --bg-overlay: rgba(0, 0, 0, 0.7);
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    --text-muted: #52525b;
    
    --border-color: rgba(255, 255, 255, 0.1);
    --border-color-light: rgba(255, 255, 255, 0.05);
    --border-color-strong: rgba(255, 255, 255, 0.2);
    
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

/* ===== Light Theme ===== */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-card-hover: rgba(248, 250, 252, 0.95);
    --bg-overlay: rgba(0, 0, 0, 0.5);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: rgba(0, 0, 0, 0.1);
    --border-color-light: rgba(0, 0, 0, 0.05);
    --border-color-strong: rgba(0, 0, 0, 0.15);
    
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
    
    /* Adjusted shadows for light mode */
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.07);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.07), 0 4px 6px -4px rgb(0 0 0 / 0.07);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.08), 0 8px 10px -6px rgb(0 0 0 / 0.08);
}