/**
 * CSS Custom Properties - Modern Design System
 * Bora Akü Website Modernization
 * 2024-2025 Color Palette with Glassmorphism
 */

:root {
  /* ============================================
     PRIMARY COLORS - Deep Blue & Indigo
     ============================================ */
  --color-primary: #1E3A8A;
  --color-primary-light: #3B82F6;
  --color-primary-dark: #1E40AF;
  --color-primary-hover: #1E40AF;

  /* ============================================
     SECONDARY COLORS - Modern Purple/Indigo
     ============================================ */
  --color-secondary: #6366F1;
  --color-secondary-light: #818CF8;
  --color-secondary-dark: #4F46E5;
  --color-secondary-hover: #4F46E5;

  /* ============================================
     ACCENT COLORS - Coral Orange & Teal
     ============================================ */
  --color-accent: #F97316;
  --color-accent-light: #FB923C;
  --color-accent-dark: #EA580C;
  --color-accent-hover: #EA580C;

  --color-teal: #06B6D4;
  --color-teal-light: #22D3EE;
  --color-teal-dark: #0891B2;

  /* ============================================
     NEUTRAL COLORS - Text & Backgrounds
     ============================================ */
  --color-text-primary: #1F2937;
  --color-text-secondary: #6B7280;
  --color-text-light: #9CA3AF;
  --color-text-white: #FFFFFF;

  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F9FAFB;
  --color-bg-tertiary: #F3F4F6;
  --color-bg-dark: #1F2937;

  --color-border: #E5E7EB;
  --color-border-light: #F3F4F6;
  --color-border-dark: #D1D5DB;

  /* ============================================
     GRADIENTS - Modern Gradient Combinations
     ============================================ */
  --gradient-primary: linear-gradient(135deg, #1E3A8A 0%, #6366F1 100%);
  --gradient-primary-hover: linear-gradient(135deg, #1E40AF 0%, #4F46E5 100%);

  --gradient-accent: linear-gradient(135deg, #F97316 0%, #FB923C 100%);
  --gradient-accent-hover: linear-gradient(135deg, #EA580C 0%, #F97316 100%);

  --gradient-hero: linear-gradient(135deg, rgba(30, 58, 138, 0.95) 0%, rgba(99, 102, 241, 0.90) 100%);
  --gradient-hero-alt: linear-gradient(135deg, rgba(99, 102, 241, 0.95) 0%, rgba(30, 58, 138, 0.90) 100%);

  --gradient-footer: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);

  --gradient-subtle: linear-gradient(135deg, #F9FAFB 0%, #FFFFFF 100%);

  /* ============================================
     GLASSMORPHISM - Frosted Glass Effects
     ============================================ */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-bg-light: rgba(255, 255, 255, 0.05);
  --glass-bg-medium: rgba(255, 255, 255, 0.15);
  --glass-bg-strong: rgba(255, 255, 255, 0.25);
  --glass-bg-dark: rgba(0, 0, 0, 0.1);

  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-border-strong: rgba(255, 255, 255, 0.3);

  --glass-shadow: rgba(31, 38, 135, 0.37);
  --glass-shadow-strong: rgba(31, 38, 135, 0.5);

  --glass-blur: blur(12px);
  --glass-blur-light: blur(8px);
  --glass-blur-strong: blur(16px);
  --glass-blur-heavy: blur(24px);

  /* ============================================
     SPACING SYSTEM - 8px Base Scale
     ============================================ */
  --space-0: 0;
  --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 */

  /* Semantic Spacing */
  --space-xs: var(--space-2);
  --space-sm: var(--space-4);
  --space-md: var(--space-6);
  --space-lg: var(--space-8);
  --space-xl: var(--space-12);
  --space-2xl: var(--space-16);
  --space-3xl: var(--space-20);

  /* ============================================
     TYPOGRAPHY SYSTEM
     ============================================ */
  --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
  --font-family-mono: 'Courier New', Courier, monospace;

  /* 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 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-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 1.75;

  /* Letter Spacing */
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;
  --letter-spacing-wider: 0.05em;

  /* ============================================
     SHADOWS - Layered Shadow System
     ============================================ */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px 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);

  /* Colored Shadows */
  --shadow-primary: 0 4px 14px rgba(30, 58, 138, 0.3);
  --shadow-secondary: 0 4px 14px rgba(99, 102, 241, 0.3);
  --shadow-accent: 0 4px 14px rgba(249, 115, 22, 0.4);

  /* ============================================
     BORDER RADIUS - Rounded Corners
     ============================================ */
  --radius-none: 0;
  --radius-sm: 0.375rem;   /* 6px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.5rem;    /* 24px */
  --radius-3xl: 2rem;      /* 32px */
  --radius-full: 9999px;

  /* ============================================
     TRANSITIONS & ANIMATIONS
     ============================================ */
  /* Duration */
  --duration-instant: 0s;
  --duration-fast: 0.15s;
  --duration-base: 0.3s;
  --duration-slow: 0.5s;
  --duration-slower: 0.75s;

  /* Easing Functions */
  --ease-linear: linear;
  --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);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);

  /* Combined Transitions */
  --transition-fast: var(--duration-fast) var(--ease-smooth);
  --transition-base: var(--duration-base) var(--ease-smooth);
  --transition-slow: var(--duration-slow) var(--ease-smooth);
  --transition-bounce: var(--duration-base) var(--ease-bounce);

  /* ============================================
     Z-INDEX SYSTEM - Layering
     ============================================ */
  --z-base: 0;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-overlay: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-maximum: 9999;

  /* ============================================
     BREAKPOINTS - Responsive Design
     ============================================ */
  --breakpoint-xs: 320px;
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;

  /* ============================================
     CONTAINER WIDTHS
     ============================================ */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1200px;
  --container-2xl: 1400px;

  /* ============================================
     COMPONENT SPECIFIC VARIABLES
     ============================================ */

  /* Header */
  --header-height: 70px;
  --header-bg: rgba(255, 255, 255, 0.85);
  --header-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);

  /* Banner */
  --banner-height-mobile: 400px;
  --banner-height-tablet: 500px;
  --banner-height-desktop: 600px;

  /* Cards */
  --card-padding: var(--space-6);
  --card-radius: var(--radius-xl);
  --card-shadow: var(--shadow-md);
  --card-shadow-hover: var(--shadow-xl);

  /* Buttons */
  --button-padding-x: 2rem;
  --button-padding-y: 0.875rem;
  --button-radius: var(--radius-full);
  --button-shadow: 0 4px 14px rgba(249, 115, 22, 0.4);

  /* Forms */
  --input-padding-x: 1.25rem;
  --input-padding-y: 0.875rem;
  --input-radius: var(--radius-lg);
  --input-border-color: var(--color-border);
  --input-focus-border: var(--color-primary);

  /* ============================================
     ACCESSIBILITY
     ============================================ */
  --focus-ring-width: 2px;
  --focus-ring-color: var(--color-secondary);
  --focus-ring-offset: 2px;
  --focus-ring: 0 0 0 var(--focus-ring-width) var(--focus-ring-color);

  /* ============================================
     EFFECTS
     ============================================ */
  --backdrop-filter-blur: blur(12px);
  --backdrop-filter-blur-strong: blur(16px);
}

/* Dark mode support (optional for future) */
@media (prefers-color-scheme: dark) {
  :root {
    /* Can be implemented later if needed */
  }
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-fast: 0.01ms;
    --duration-base: 0.01ms;
    --duration-slow: 0.01ms;
    --duration-slower: 0.01ms;
  }
}