/**
 * QMF Design Tokens
 * Design system foundation - CSS custom properties
 * @version 1.0.0
 */

:root {
    /* ============================================
       COLOR PALETTE
       ============================================ */
    
    /* Primary Colors */
    --qmf-color-primary-50: #eff6ff;
    --qmf-color-primary-100: #dbeafe;
    --qmf-color-primary-200: #bfdbfe;
    --qmf-color-primary-300: #93c5fd;
    --qmf-color-primary-400: #60a5fa;
    --qmf-color-primary-500: #3b82f6;
    --qmf-color-primary-600: #2563eb;
    --qmf-color-primary-700: #1d4ed8;
    --qmf-color-primary-800: #1e40af;
    --qmf-color-primary-900: #1e3a8a;
    
    /* Semantic Colors */
    --qmf-color-primary: var(--qmf-color-primary-600);
    --qmf-color-primary-hover: var(--qmf-color-primary-700);
    --qmf-color-primary-active: var(--qmf-color-primary-800);
    
    /* Success */
    --qmf-color-success-50: #ecfdf5;
    --qmf-color-success-100: #d1fae5;
    --qmf-color-success-500: #10b981;
    --qmf-color-success-600: #059669;
    --qmf-color-success-700: #047857;
    --qmf-color-success: var(--qmf-color-success-600);
    
    /* Warning */
    --qmf-color-warning-50: #fffbeb;
    --qmf-color-warning-100: #fef3c7;
    --qmf-color-warning-500: #f59e0b;
    --qmf-color-warning-600: #d97706;
    --qmf-color-warning-700: #b45309;
    --qmf-color-warning: var(--qmf-color-warning-600);
    
    /* Danger/Error */
    --qmf-color-danger-50: #fef2f2;
    --qmf-color-danger-100: #fee2e2;
    --qmf-color-danger-500: #ef4444;
    --qmf-color-danger-600: #dc2626;
    --qmf-color-danger-700: #b91c1c;
    --qmf-color-danger: var(--qmf-color-danger-600);
    
    /* Info */
    --qmf-color-info-50: #f0f9ff;
    --qmf-color-info-100: #e0f2fe;
    --qmf-color-info-500: #0ea5e9;
    --qmf-color-info-600: #0284c7;
    --qmf-color-info-700: #0369a1;
    --qmf-color-info: var(--qmf-color-info-600);
    
    /* Neutral/Gray */
    --qmf-color-gray-50: #f9fafb;
    --qmf-color-gray-100: #f3f4f6;
    --qmf-color-gray-200: #e5e7eb;
    --qmf-color-gray-300: #d1d5db;
    --qmf-color-gray-400: #9ca3af;
    --qmf-color-gray-500: #6b7280;
    --qmf-color-gray-600: #4b5563;
    --qmf-color-gray-700: #374151;
    --qmf-color-gray-800: #1f2937;
    --qmf-color-gray-900: #111827;
    --qmf-color-gray-950: #030712;
    
    /* Background & Surface */
    --qmf-color-bg: #ffffff;
    --qmf-color-bg-secondary: var(--qmf-color-gray-50);
    --qmf-color-bg-tertiary: var(--qmf-color-gray-100);
    --qmf-color-surface: #ffffff;
    --qmf-color-surface-elevated: #ffffff;
    
    /* Text Colors */
    --qmf-color-text: var(--qmf-color-gray-900);
    --qmf-color-text-secondary: var(--qmf-color-gray-600);
    --qmf-color-text-tertiary: var(--qmf-color-gray-500);
    --qmf-color-text-disabled: var(--qmf-color-gray-400);
    --qmf-color-text-inverse: #ffffff;
    --qmf-color-text-link: var(--qmf-color-primary);
    
    /* Border Colors */
    --qmf-color-border: var(--qmf-color-gray-200);
    --qmf-color-border-light: var(--qmf-color-gray-100);
    --qmf-color-border-dark: var(--qmf-color-gray-300);
    --qmf-color-border-focus: var(--qmf-color-primary);
    
    /* ============================================
       SPACING
       ============================================ */
    --qmf-space-0: 0;
    --qmf-space-1: 0.25rem;   /* 4px */
    --qmf-space-2: 0.5rem;    /* 8px */
    --qmf-space-3: 0.75rem;   /* 12px */
    --qmf-space-4: 1rem;      /* 16px */
    --qmf-space-5: 1.25rem;   /* 20px */
    --qmf-space-6: 1.5rem;    /* 24px */
    --qmf-space-8: 2rem;      /* 32px */
    --qmf-space-10: 2.5rem;   /* 40px */
    --qmf-space-12: 3rem;     /* 48px */
    --qmf-space-16: 4rem;     /* 64px */
    --qmf-space-20: 5rem;     /* 80px */
    --qmf-space-24: 6rem;     /* 96px */
    
    /* ============================================
       SIZING
       ============================================ */
    --qmf-size-xs: 1.5rem;    /* 24px */
    --qmf-size-sm: 2rem;      /* 32px */
    --qmf-size-md: 2.5rem;    /* 40px */
    --qmf-size-lg: 3rem;      /* 48px */
    --qmf-size-xl: 3.5rem;    /* 56px */
    
    /* Header & Sidebar */
    --qmf-header-height: 60px;
    --qmf-sidebar-width: 260px;
    --qmf-sidebar-collapsed-width: 64px;
    --qmf-footer-height: 48px;
    
    /* ============================================
       TYPOGRAPHY
       ============================================ */
    --qmf-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --qmf-font-family-mono: 'SF Mono', Monaco, 'Cascadia Mono', 'Segoe UI Mono', 'Roboto Mono', monospace;
    --qmf-font-family-heading: var(--qmf-font-family);
    
    /* Font Sizes */
    --qmf-font-size-xs: 0.75rem;    /* 12px */
    --qmf-font-size-sm: 0.875rem;   /* 14px */
    --qmf-font-size-base: 1rem;     /* 16px */
    --qmf-font-size-lg: 1.125rem;   /* 18px */
    --qmf-font-size-xl: 1.25rem;    /* 20px */
    --qmf-font-size-2xl: 1.5rem;    /* 24px */
    --qmf-font-size-3xl: 1.875rem;  /* 30px */
    --qmf-font-size-4xl: 2.25rem;   /* 36px */
    --qmf-font-size-5xl: 3rem;      /* 48px */
    
    /* Font Weights */
    --qmf-font-weight-light: 300;
    --qmf-font-weight-normal: 400;
    --qmf-font-weight-medium: 500;
    --qmf-font-weight-semibold: 600;
    --qmf-font-weight-bold: 700;
    
    /* Line Heights */
    --qmf-line-height-tight: 1.25;
    --qmf-line-height-snug: 1.375;
    --qmf-line-height-normal: 1.5;
    --qmf-line-height-relaxed: 1.625;
    --qmf-line-height-loose: 2;
    
    /* Letter Spacing */
    --qmf-letter-spacing-tight: -0.025em;
    --qmf-letter-spacing-normal: 0;
    --qmf-letter-spacing-wide: 0.025em;
    
    /* ============================================
       BORDER RADIUS
       ============================================ */
    --qmf-radius-none: 0;
    --qmf-radius-sm: 0.125rem;   /* 2px */
    --qmf-radius-md: 0.375rem;   /* 6px */
    --qmf-radius-lg: 0.5rem;     /* 8px */
    --qmf-radius-xl: 0.75rem;    /* 12px */
    --qmf-radius-2xl: 1rem;      /* 16px */
    --qmf-radius-full: 9999px;
    
    --qmf-radius: var(--qmf-radius-md);
    
    /* ============================================
       SHADOWS
       ============================================ */
    --qmf-shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --qmf-shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --qmf-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --qmf-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --qmf-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --qmf-shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --qmf-shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);
    
    --qmf-shadow: var(--qmf-shadow-md);
    
    /* ============================================
       Z-INDEX
       ============================================ */
    --qmf-z-dropdown: 1000;
    --qmf-z-sticky: 1020;
    --qmf-z-fixed: 1030;
    --qmf-z-modal-backdrop: 1040;
    --qmf-z-modal: 1050;
    --qmf-z-popover: 1060;
    --qmf-z-tooltip: 1070;
    --qmf-z-toast: 1080;
    
    /* ============================================
       TRANSITIONS
       ============================================ */
    --qmf-duration-fast: 150ms;
    --qmf-duration-normal: 250ms;
    --qmf-duration-slow: 350ms;
    
    --qmf-easing-default: cubic-bezier(0.4, 0, 0.2, 1);
    --qmf-easing-in: cubic-bezier(0.4, 0, 1, 1);
    --qmf-easing-out: cubic-bezier(0, 0, 0.2, 1);
    --qmf-easing-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --qmf-easing-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    --qmf-transition: all var(--qmf-duration-normal) var(--qmf-easing-default);
    --qmf-transition-fast: all var(--qmf-duration-fast) var(--qmf-easing-default);
    
    /* ============================================
       BREAKPOINTS (for reference in JS)
       ============================================ */
    --qmf-breakpoint-xs: 0;
    --qmf-breakpoint-sm: 576px;
    --qmf-breakpoint-md: 768px;
    --qmf-breakpoint-lg: 992px;
    --qmf-breakpoint-xl: 1200px;
    --qmf-breakpoint-xxl: 1400px;
    
    /* ============================================
       FOCUS RING
       ============================================ */
    --qmf-focus-ring-width: 2px;
    --qmf-focus-ring-offset: 2px;
    --qmf-focus-ring-color: var(--qmf-color-primary-400);
    --qmf-focus-ring: 0 0 0 var(--qmf-focus-ring-width) var(--qmf-focus-ring-color);
}

/* ============================================
   BASE STYLES
   ============================================ */

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--qmf-font-family);
    font-size: var(--qmf-font-size-base);
    font-weight: var(--qmf-font-weight-normal);
    line-height: var(--qmf-line-height-normal);
    color: var(--qmf-color-text);
    background-color: var(--qmf-color-bg);
}

/* Focus styles */
:focus-visible {
    outline: none;
    box-shadow: var(--qmf-focus-ring);
}

/* Selection */
::selection {
    background-color: var(--qmf-color-primary-200);
    color: var(--qmf-color-primary-900);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}