/**
 * Design System Variables
 * CSS Custom Properties for the default theme
 * Path: /themes/custom/default/css/base/variables.css
 */

:root {
  /* ===================================
     Colors - Primary Palette
     =================================== */
  --color-primary: #007bff;
  --color-primary-light: #3395ff;
  --color-primary-dark: #0056b3;
  
  --color-secondary: #6c757d;
  --color-secondary-light: #868e96;
  --color-secondary-dark: #495057;
  
  /* State Colors */
  --color-success: #28a745;
  --color-danger: #dc3545;
  --color-warning: #ffc107;
  --color-info: #17a2b8;
  
  /* ===================================
     Colors - Neutrals
     =================================== */
  --color-white: #ffffff;
  --color-black: #000000;
  
  --color-gray-100: #f8f9fa;
  --color-gray-200: #e9ecef;
  --color-gray-300: #dee2e6;
  --color-gray-400: #ced4da;
  --color-gray-500: #adb5bd;
  --color-gray-600: #6c757d;
  --color-gray-700: #495057;
  --color-gray-800: #343a40;
  --color-gray-900: #212529;
  
  /* ===================================
     Colors - Semantic
     =================================== */
  --color-text: var(--color-gray-900);
  --color-text-light: var(--color-gray-600);
  --color-text-muted: var(--color-gray-500);
  
  --color-bg: var(--color-white);
  --color-bg-alt: var(--color-gray-100);
  --color-bg-dark: var(--color-gray-800);
  
  --color-border: var(--color-gray-300);
  --color-border-light: var(--color-gray-200);
  --color-border-dark: var(--color-gray-400);
  
  --color-link: var(--color-primary);
  --color-link-hover: var(--color-primary-dark);
  --color-link-visited: #551a8b;
  
  /* ===================================
     Typography
     =================================== */
  /* Font Families */
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, 
               "Helvetica Neue", Arial, sans-serif, 
               "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  --font-heading: var(--font-base);
  --font-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 Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --line-height-loose: 2;
  
  /* Letter Spacing */
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;
  
  /* ===================================
     Spacing Scale
     =================================== */
  --space-0: 0;
  --space-xs: 0.25rem;    /* 4px */
  --space-sm: 0.5rem;     /* 8px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 2.5rem;    /* 40px */
  --space-3xl: 3rem;      /* 48px */
  --space-4xl: 4rem;      /* 64px */
  --space-5xl: 6rem;      /* 96px */
  
  /* ===================================
     Layout
     =================================== */
  --container-max: 1200px;
  --container-padding: var(--space-md);
  
  --header-height: 80px;
  --footer-height: auto;
  
  --content-max-width: 65ch;
  --sidebar-width: 300px;
  
  /* ===================================
     Responsive Breakpoints
     =================================== */
  --bp-mobile: 640px;
  --bp-tablet: 768px;
  --bp-desktop: 1024px;
  --bp-wide: 1280px;
  --bp-ultra: 1536px;
  
  /* ===================================
     Borders & Radius
     =================================== */
  --border-width: 1px;
  --border-width-thick: 2px;
  
  --border-radius-none: 0;
  --border-radius-sm: 2px;
  --border-radius-base: 4px;
  --border-radius-md: 6px;
  --border-radius-lg: 8px;
  --border-radius-xl: 12px;
  --border-radius-full: 9999px;
  
  /* ===================================
     Shadows
     =================================== */
  --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: 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);
  
  /* ===================================
     Transitions
     =================================== */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  
  --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);
  
  /* ===================================
     Z-Index Scale
     =================================== */
  --z-index-dropdown: 1000;
  --z-index-sticky: 100;
  --z-index-fixed: 1030;
  --z-index-modal-backdrop: 1040;
  --z-index-modal: 1050;
  --z-index-popover: 1060;
  --z-index-tooltip: 1070;
  
  /* ===================================
     Forms
     =================================== */
  --input-height: 2.5rem;
  --input-padding-x: var(--space-md);
  --input-padding-y: var(--space-sm);
  --input-border-color: var(--color-border);
  --input-border-radius: var(--border-radius-base);
  --input-focus-border-color: var(--color-primary);
  --input-focus-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
  
  /* ===================================
     Buttons
     =================================== */
  --button-height: 2.5rem;
  --button-padding-x: var(--space-lg);
  --button-padding-y: var(--space-sm);
  --button-border-radius: var(--border-radius-base);
  --button-font-weight: var(--font-weight-medium);
}

/* ===================================
   Dark Mode Variables (Optional)
   =================================== */
@media (prefers-color-scheme: dark) {
  :root {
    --color-text: var(--color-gray-100);
    --color-text-light: var(--color-gray-400);
    --color-bg: var(--color-gray-900);
    --color-bg-alt: var(--color-gray-800);
    --color-border: var(--color-gray-700);
  }
}

/* ===================================
   Print Styles Variables
   =================================== */
@media print {
  :root {
    --color-text: #000;
    --color-bg: #fff;
  }
}

/* ===================================
   Extended Layout Variables
   =================================== */

/* Container variants */
--container-narrow: 800px;
--container-wide: 1600px;

/* Grid gaps */
--gap-sm: var(--space-sm);
--gap-md: var(--space-md);
--gap-lg: var(--space-lg);
--gap-xl: var(--space-xl);

/* Hero gradients */
--hero-gradient: linear-gradient(180deg, 
  var(--color-primary-light) 0%, 
  var(--color-primary) 100%);

/* Sticky header height */
--header-sticky-height: 80px;