// ========================================
// DESIGN TOKENS - Modern UI Design System
// ========================================

// Dynamic Theme Variables (CSS Custom Properties)
// ========================================
:root {
  // Default theme colors (fallback)
  --theme-primary: #0ea5e9;
  --theme-secondary: #64748b;
  --theme-accent: #8b5cf6;
  --theme-error: #ef4444;
  --theme-error-dark: #dc2626;
  --theme-background: #f8fafc;
  --theme-surface: #ffffff;
  --theme-text: #1f2937;
  --theme-text-secondary: #6b7280;
  --theme-border-radius: 0.5rem;
  --theme-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --theme-font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --theme-font-secondary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --theme-font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
}

// Color Palette
// ========================================

// Primary Colors (with theme support)
$primary-50: #f0f9ff;
$primary-100: #e0f2fe;
$primary-200: #bae6fd;
$primary-300: #7dd3fc;
$primary-400: #38bdf8;
$primary-500: var(--theme-primary, #0ea5e9);  // Dynamic primary
$primary-600: #0284c7;
$primary-700: #0369a1;
$primary-800: #075985;
$primary-900: #0c4a6e;

// Secondary Colors (with theme support)
$secondary-50: #f8fafc;
$secondary-100: #f1f5f9;
$secondary-200: #e2e8f0;
$secondary-300: #cbd5e1;
$secondary-400: #94a3b8;
$secondary-500: var(--theme-secondary, #64748b);  // Dynamic secondary
$secondary-600: #475569;
$secondary-700: #334155;
$secondary-800: #1e293b;
$secondary-900: #0f172a;

// Accent Colors (with theme support)
$accent-purple: var(--theme-accent, #8b5cf6);
$accent-green: #10b981;
$accent-orange: #f59e0b;
$accent-red: #ef4444;
$accent-pink: #ec4899;

// Neutral Colors (with theme support)
$white: #ffffff;
$gray-50: #f9fafb;
$gray-100: #f3f4f6;
$gray-200: #e5e7eb;
$gray-300: #d1d5db;
$gray-400: #9ca3af;
$gray-500: #6b7280;
$gray-600: #4b5563;
$gray-700: #374151;
$gray-800: #1f2937;
$gray-900: var(--theme-text, #111827);  // Dynamic text color
$black: #000000;

// Theme-aware colors
$theme-background: var(--theme-background, #f8fafc);
$theme-surface: var(--theme-surface, #ffffff);
$theme-text: var(--theme-text, #1f2937);
$theme-text-secondary: var(--theme-text-secondary, #6b7280);

// Semantic Colors
$success: $accent-green;
$warning: $accent-orange;
$error: $accent-red;
$info: $primary-500;

// Typography
// ========================================

// Font Families (with theme support)
$font-primary: var(--theme-font-primary, 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif);
$font-secondary: var(--theme-font-secondary, 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif);
$font-mono: var(--theme-font-mono, 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, 'Liberation Mono', Menlo, Courier, 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

// Font Weights
$font-thin: 100;
$font-light: 300;
$font-normal: 400;
$font-medium: 500;
$font-semibold: 600;
$font-bold: 700;
$font-extrabold: 800;
$font-black: 900;

// Line Heights
$leading-none: 1;
$leading-tight: 1.25;
$leading-snug: 1.375;
$leading-normal: 1.5;
$leading-relaxed: 1.625;
$leading-loose: 2;

// Spacing System
// ========================================

$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

// Border Radius (with theme support)
// ========================================

$radius-none: 0;
$radius-sm: 0.125rem;   // 2px
$radius-base: 0.25rem;  // 4px
$radius-md: 0.375rem;   // 6px
$radius-lg: var(--theme-border-radius, 0.5rem);     // Dynamic border radius
$radius-xl: 0.75rem;    // 12px
$radius-2xl: 1rem;      // 16px
$radius-3xl: 1.5rem;    // 24px
$radius-full: 9999px;

// Shadows (with theme support)
// ========================================

$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: var(--theme-shadow, 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05));  // Dynamic shadow
$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);

// Glassmorphism Shadows
$glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
$glass-shadow-lg: 0 20px 40px 0 rgba(31, 38, 135, 0.4);

// Animation
// ========================================

// 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);
$ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
$ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);

// Duration
$duration-75: 75ms;
$duration-100: 100ms;
$duration-150: 150ms;
$duration-200: 200ms;
$duration-300: 300ms;
$duration-500: 500ms;
$duration-700: 700ms;
$duration-1000: 1000ms;

// Responsive Breakpoints
// ========================================

$breakpoint-sm: 640px;   // Small devices
$breakpoint-md: 768px;   // Medium devices
$breakpoint-lg: 1024px;  // Large devices
$breakpoint-xl: 1280px;  // Extra large devices
$breakpoint-2xl: 1536px; // 2X large devices

// Z-Index Scale
// ========================================

$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;

// Component Specific Variables
// ========================================

// Header
$header-height: 4rem; // 64px
$header-bg: rgba(255, 255, 255, 0.95);
$header-border: rgba(0, 0, 0, 0.1);

// Sidebar
$sidebar-width: 16rem; // 256px
$sidebar-width-collapsed: 4rem; // 64px
$sidebar-bg: rgba(255, 255, 255, 0.98);
$sidebar-border: rgba(0, 0, 0, 0.05);

// Cards
$card-bg: rgba(255, 255, 255, 0.9);
$card-border: rgba(0, 0, 0, 0.05);
$card-shadow: $shadow-lg;

// Buttons
$btn-height-sm: 2rem; // 32px
$btn-height-md: 2.5rem; // 40px
$btn-height-lg: 3rem; // 48px

// Form Elements
$input-height: 2.5rem; // 40px
$input-border: rgba(0, 0, 0, 0.1);
$input-border-focus: $primary-500;
$input-border-error: $error;

// Gradients
// ========================================

$gradient-primary: linear-gradient(135deg, $primary-500 0%, $primary-700 100%);
$gradient-secondary: linear-gradient(135deg, $secondary-500 0%, $secondary-700 100%);
$gradient-accent: linear-gradient(135deg, $accent-purple 0%, $accent-pink 100%);
$gradient-success: linear-gradient(135deg, $accent-green 0%, #059669 100%);
$gradient-warning: linear-gradient(135deg, $accent-orange 0%, #d97706 100%);
$gradient-error: linear-gradient(135deg, $accent-red 0%, #dc2626 100%);

// Glassmorphism Gradients
$glass-gradient: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
$glass-gradient-dark: linear-gradient(135deg, rgba(0, 0, 0, 0.1) 0%, rgba(0, 0, 0, 0.05) 100%);

// Backdrop Blur
$backdrop-blur-sm: blur(4px);
$backdrop-blur-md: blur(8px);
$backdrop-blur-lg: blur(16px);
$backdrop-blur-xl: blur(24px);