/**
 * Design Tokens - StratIntel Design System
 * Version: 2.0.0
 * Created: 2025-12-07
 * Updated: 2026-02-19 - Scandinavian calm palette, chart tokens, gentle transitions
 * Purpose: Centralized design variables — calm technology, Scandinavian minimalism
 *
 * Usage: Import this file FIRST before any other stylesheets
 * to ensure consistent theming across the entire application.
 */

:root {
    /* ============================================
       COLOR PALETTE
       ============================================ */

    /* Primary Colors (Blue) - Main brand color */
    --color-primary-50: #e3f2fd;
    --color-primary-100: #bbdefb;
    --color-primary-200: #90caf9;
    --color-primary-300: #64b5f6;
    --color-primary-400: #42a5f5;
    --color-primary-500: #4a7fb5;  /* Steel blue - calm primary */
    --color-primary-600: #1e88e5;
    --color-primary-700: #1976d2;
    --color-primary-800: #1565c0;
    --color-primary-900: #0d47a1;

    /* Semantic Colors - Muted Scandinavian palette for calm feedback */
    --color-success: #5d9e7a;
    --color-success-light: #7db896;
    --color-success-dark: #4a7f62;

    --color-warning: #c79a4e;
    --color-warning-light: #d4b06e;
    --color-warning-dark: #a6803f;

    --color-error: #b54d4d;
    --color-error-light: #c87070;
    --color-error-dark: #953e3e;

    --color-info: #4a7fb5;
    --color-info-light: #6e9bc8;
    --color-info-dark: #3a6694;

    /* Tailwind Red (for error/danger badges) */
    --color-red-50: #fef2f2;
    --color-red-100: #fee2e2;
    --color-red-200: #fecaca;
    --color-red-300: #fca5a5;
    --color-red-400: #f87171;
    --color-red-500: #ef4444;
    --color-red-600: #dc2626;
    --color-red-700: #b91c1c;
    --color-red-800: #991b1b;
    --color-red-900: #7f1d1d;

    /* Tailwind Green (for success badges) */
    --color-green-50: #f0fdf4;
    --color-green-100: #dcfce7;
    --color-green-200: #bbf7d0;
    --color-green-300: #86efac;
    --color-green-400: #4ade80;
    --color-green-500: #22c55e;
    --color-green-600: #16a34a;
    --color-green-700: #15803d;
    --color-green-800: #166534;
    --color-green-900: #14532d;

    /* Tailwind Amber/Yellow (for warning badges) */
    --color-amber-50: #fffbeb;
    --color-amber-100: #fef3c7;
    --color-amber-200: #fde68a;
    --color-amber-300: #fcd34d;
    --color-amber-400: #fbbf24;
    --color-amber-500: #f59e0b;
    --color-amber-600: #d97706;
    --color-amber-700: #b45309;
    --color-amber-800: #92400e;
    --color-amber-900: #78350f;

    /* Tailwind Blue (for links and primary actions) */
    --color-blue-50: #eff6ff;
    --color-blue-100: #dbeafe;
    --color-blue-200: #bfdbfe;
    --color-blue-300: #93c5fd;
    --color-blue-400: #60a5fa;
    --color-blue-500: #3b82f6;
    --color-blue-600: #2563eb;
    --color-blue-700: #1d4ed8;
    --color-blue-800: #1e40af;
    --color-blue-900: #1e3a8a;

    /* Tailwind Emerald (alternative green) */
    --color-emerald-100: #d1fae5;
    --color-emerald-200: #a7f3d0;
    --color-emerald-300: #6ee7b7;
    --color-emerald-500: #10b981;
    --color-emerald-700: #047857;
    --color-emerald-800: #065f46;

    /* Tailwind Violet/Purple (for entity badges) */
    --color-violet-100: #ede9fe;
    --color-violet-200: #ddd6fe;
    --color-violet-300: #c4b5fd;
    --color-violet-500: #8b5cf6;
    --color-violet-700: #6d28d9;
    --color-violet-800: #5b21b6;

    /* Tailwind Sky (for info badges) */
    --color-sky-100: #e0f2fe;
    --color-sky-200: #bae6fd;
    --color-sky-300: #7dd3fc;
    --color-sky-500: #0ea5e9;
    --color-sky-600: #0284c7;
    --color-sky-700: #0369a1;
    --color-sky-800: #075985;

    /* Tailwind Fuchsia/Pink (for special badges) */
    --color-fuchsia-50: #fdf4ff;
    --color-fuchsia-100: #fae8ff;
    --color-fuchsia-200: #f5d0fe;
    --color-fuchsia-400: #e879f9;
    --color-fuchsia-600: #c026d3;
    --color-fuchsia-700: #a21caf;
    --color-fuchsia-800: #86198f;
    --color-fuchsia-900: #701a75;

    /* Tailwind Orange (for secondary warnings) */
    --color-orange-50: #fff7ed;
    --color-orange-100: #ffedd5;
    --color-orange-200: #fed7aa;
    --color-orange-300: #fdba74;
    --color-orange-400: #fb923c;
    --color-orange-500: #f97316;
    --color-orange-600: #ea580c;
    --color-orange-700: #c2410c;
    --color-orange-800: #9a3412;
    --color-orange-900: #7c2d12;

    /* Neutral Colors - Grays for text, borders, backgrounds */
    --color-gray-50: #fafafa;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #eeeeee;
    --color-gray-300: #e0e0e0;
    --color-gray-400: #bdbdbd;
    --color-gray-500: #9e9e9e;
    --color-gray-600: #757575;
    --color-gray-700: #616161;
    --color-gray-800: #424242;
    --color-gray-900: #212121;

    /* Tailwind Slate Colors - Blue-gray tint for modern dark mode */
    --color-slate-50: #f8fafc;
    --color-slate-100: #f1f5f9;
    --color-slate-200: #e2e8f0;
    --color-slate-300: #cbd5e1;
    --color-slate-400: #94a3b8;
    --color-slate-500: #64748b;
    --color-slate-600: #475569;
    --color-slate-700: #334155;
    --color-slate-800: #1e293b;
    --color-slate-900: #0f172a;

    /* Priority Colors (P1/P2/P3) - Muted Scandinavian palette */
    --color-priority-p1: #c75a47;  /* Deep terracotta - urgent but calm */
    --color-priority-p2: #d4a053;  /* Muted amber - warm caution */
    --color-priority-p3: #6b9e78;  /* Sage green - calm "all clear" */

    /* Geographic Focus (K1/K2/K3) - Muted scope indicators */
    --color-geo-k1: #5b8fb9;  /* Steel blue - Sweden */
    --color-geo-k2: #8a6e9e;  /* Muted plum - EU */
    --color-geo-k3: #7c8e96;  /* Warm blue-gray - Global */

    /* Background Colors */
    --color-background-primary: #ffffff;
    --color-background-secondary: var(--color-gray-50);
    --color-background-tertiary: var(--color-gray-100);

    /* Base Colors */
    --color-white: #ffffff;
    --color-black: #000000;

    /* Text Colors */
    --color-text-primary: var(--color-gray-900);
    --color-text-secondary: var(--color-gray-800);  /* Changed from gray-700 (#616161) to gray-800 (#424242) for better readability */
    --color-text-tertiary: var(--color-gray-600);
    --color-text-disabled: var(--color-gray-400);
    --color-text-inverse: var(--color-white);

    /* Border Colors */
    --color-border-light: var(--color-gray-200);
    --color-border-medium: var(--color-gray-300);
    --color-border-dark: var(--color-gray-400);

    /* Link Colors */
    --color-link: var(--color-primary-600);
    --color-link-hover: var(--color-primary-700);
    --color-link-visited: var(--color-primary-800);

    /* ============================================
       SHORTHAND ALIASES (for templates)
       ============================================ */

    /* Background Aliases */
    --color-bg-primary: var(--color-background-primary);
    --color-bg-secondary: var(--color-background-secondary);
    --color-bg-tertiary: var(--color-background-tertiary);
    --color-bg-card: var(--color-background-primary);
    --color-bg-input: var(--color-background-tertiary);
    --color-bg-hover: var(--color-gray-100);

    /* Border Alias */
    --color-border: var(--color-border-medium);

    /* Primary Color Aliases */
    --color-primary: var(--color-primary-500);
    --color-primary-hover: var(--color-primary-600);

    /* Accent Color (for highlights) */
    --color-accent: var(--color-primary-500);
    --color-accent-hover: var(--color-primary-600);

    /* Text Muted (very light) */
    --color-text-muted: var(--color-gray-500);

    /* ============================================
       LEGACY COMPATIBILITY ALIASES
       (Maps style_v2.css names to design-tokens)
       ============================================ */

    /* Neutrals (style_v2.css compatibility) */
    --color-bg: var(--color-background-primary);
    --color-surface: var(--color-gray-50);
    --color-text: var(--color-text-primary);

    /* Priority Colors (shorthand) - Scandinavian muted */
    --color-p1: #b54d4d;  /* Muted ruby - High Priority */
    --color-p2: #c79a4e;  /* Muted gold - Medium Priority */
    --color-p3: #5d9e7a;  /* Muted teal - Low Priority */

    /* Focus State Colors */
    --color-focus-blue: #4a6fa5;  /* Input focus border */
    --color-focus-ring: rgba(74, 111, 165, 0.2);  /* Focus shadow */

    /* Special Background Colors */
    --dark-bg-deep-blue: #1e3a5f;  /* Filter banner, deep blue backgrounds */
    --dark-bg-highlight: #353548;  /* Skeleton loader highlight */

    /* Feed Management Action Colors - Muted Scandinavian */
    --color-feed-action-p1: #b54d4d;       /* P1 filter link */
    --color-feed-action-all: #5b8fb9;      /* All feeds link */
    --color-feed-action-export: #5d9e7a;   /* Export link */
    --color-feed-action-import: #8a6e9e;   /* Import link */
    --color-feed-config-export: #c79a4e;   /* Config export link */
    --color-feed-config-import: #b5854a;   /* Config import link */

    /* Touch Targets */
    --touch-target: 44px;  /* WCAG 2.5.5 AAA */

    /* Layout */
    --max-width: 1200px;
    --sidebar-width: 250px;
    --header-height: 60px;


    /* ============================================
       TYPOGRAPHY
       ============================================ */

    /* Font Families */
    --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    --font-family-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", "Courier New", monospace;

    /* Font Sizes - Based on 16px root */
    --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 Weights */
    --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;
    --letter-spacing-wider: 0.05em;

    /* Fluid Typography (responsive scaling) */
    --text-xs: 0.75rem;                                    /* 12px */
    --text-sm: 0.875rem;                                   /* 14px */
    --text-base: 1rem;                                     /* 16px */
    --text-lg: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);     /* 16-18px */
    --text-xl: clamp(1.25rem, 1rem + 1vw, 1.5rem);        /* 20-24px */
    --text-2xl: clamp(1.5rem, 1.2rem + 1.5vw, 2rem);      /* 24-32px */
    --text-3xl: clamp(1.875rem, 1.5rem + 2vw, 2.5rem);    /* 30-40px */


    /* ============================================
       SPACING
       ============================================ */

    --space-0: 0;
    --space-px: 1px;
    --space-0-5: 0.125rem;  /* 2px */
    --space-1: 0.25rem;     /* 4px */
    --space-1-5: 0.375rem;  /* 6px */
    --space-2: 0.5rem;      /* 8px */
    --space-2-5: 0.625rem;  /* 10px */
    --space-3: 0.75rem;     /* 12px */
    --space-3-5: 0.875rem;  /* 14px */
    --space-4: 1rem;        /* 16px */
    --space-5: 1.25rem;     /* 20px */
    --space-6: 1.5rem;      /* 24px */
    --space-7: 1.75rem;     /* 28px */
    --space-8: 2rem;        /* 32px */
    --space-9: 2.25rem;     /* 36px */
    --space-10: 2.5rem;     /* 40px */
    --space-11: 2.75rem;    /* 44px */
    --space-12: 3rem;       /* 48px */
    --space-14: 3.5rem;     /* 56px */
    --space-16: 4rem;       /* 64px */
    --space-20: 5rem;       /* 80px */
    --space-24: 6rem;       /* 96px */
    --space-32: 8rem;       /* 128px */


    /* ============================================
       BORDERS
       ============================================ */

    /* Border Widths */
    --border-width-0: 0;
    --border-width-thin: 1px;
    --border-width-medium: 2px;
    --border-width-thick: 4px;

    /* Border Radius */
    --border-radius-none: 0;
    --border-radius-sm: 0.25rem;   /* 4px */
    --border-radius-md: 0.5rem;    /* 8px */
    --border-radius-lg: 0.75rem;   /* 12px */
    --border-radius-xl: 1rem;      /* 16px */
    --border-radius-2xl: 1.5rem;   /* 24px */
    --border-radius-full: 9999px;  /* Circular */


    /* ============================================
       SHADOWS
       ============================================ */

    --shadow-none: none;
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 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);
    --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);

    /* Focus Shadow (matches --color-primary-500: #4a7fb5) */
    --shadow-focus: 0 0 0 3px rgba(74, 127, 181, 0.3);


    /* ============================================
       TRANSITIONS
       ============================================ */

    /* Durations */
    --transition-fast: 150ms;
    --transition-base: 200ms;
    --transition-slow: 300ms;
    --transition-slower: 500ms;

    /* Timing 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-gentle: cubic-bezier(0.25, 0.1, 0.25, 1);

    /* Common Transitions */
    --transition-colors: color var(--transition-base) var(--ease-in-out),
                         background-color var(--transition-base) var(--ease-in-out),
                         border-color var(--transition-base) var(--ease-in-out);
    --transition-shadow: box-shadow var(--transition-base) var(--ease-in-out);
    --transition-transform: transform var(--transition-base) var(--ease-in-out);
    --transition-all: all var(--transition-base) var(--ease-in-out);
    --transition-calm: opacity var(--transition-base) var(--ease-in-out),
                       color var(--transition-base) var(--ease-in-out),
                       background-color var(--transition-base) var(--ease-in-out);


    /* ============================================
       Z-INDEX LAYERS
       ============================================ */

    --z-index-base: 0;
    --z-index-dropdown: 1000;
    --z-index-sticky: 1020;
    --z-index-fixed: 1030;
    --z-index-modal-backdrop: 1040;
    --z-index-modal: 1050;
    --z-index-popover: 1060;
    --z-index-tooltip: 1070;
    --z-index-skip-link: 10000;


    /* ============================================
       BREAKPOINTS (for reference in media queries)
       ============================================ */

    --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: 1280px;
    --container-2xl: 1536px;


    /* ============================================
       OPACITY
       ============================================ */

    --opacity-0: 0;
    --opacity-5: 0.05;
    --opacity-10: 0.1;
    --opacity-20: 0.2;
    --opacity-25: 0.25;
    --opacity-30: 0.3;
    --opacity-40: 0.4;
    --opacity-50: 0.5;
    --opacity-60: 0.6;
    --opacity-70: 0.7;
    --opacity-75: 0.75;
    --opacity-80: 0.8;
    --opacity-90: 0.9;
    --opacity-95: 0.95;
    --opacity-100: 1;


    /* ============================================
       BLUR
       ============================================ */

    --blur-none: 0;
    --blur-sm: 4px;
    --blur-md: 8px;
    --blur-lg: 16px;
    --blur-xl: 24px;
    --blur-2xl: 40px;


    /* ============================================
       BADGE COLORS (semantic tokens for badge backgrounds/text)
       ============================================ */

    /* Priority badge backgrounds & text (light mode) */
    --color-badge-p1-bg: var(--color-red-100);
    --color-badge-p1-text: var(--color-red-800);
    --color-badge-p1-border: var(--color-priority-p1);
    --color-badge-p2-bg: var(--color-amber-100);
    --color-badge-p2-text: var(--color-amber-800);
    --color-badge-p2-border: var(--color-priority-p2);
    --color-badge-p3-bg: var(--color-emerald-100);
    --color-badge-p3-text: var(--color-emerald-800);
    --color-badge-p3-border: var(--color-priority-p3);

    /* Geographic scope badge colors */
    --color-badge-sweden-bg: #dce8f2;
    --color-badge-sweden-text: var(--color-geo-k1);
    --color-badge-eu-bg: #dde3ef;
    --color-badge-eu-text: var(--color-geo-k2);

    /* Theme & entity badge colors */
    --color-badge-theme-bg: var(--color-violet-100);
    --color-badge-theme-text: var(--color-violet-800);
    --color-badge-theme-border: var(--color-violet-500);
    --color-badge-entity-bg: var(--color-sky-100);
    --color-badge-entity-text: var(--color-sky-800);
    --color-badge-entity-border: var(--color-sky-600);

    /* Sentiment badge colors */
    --color-badge-sentiment-pos-bg: #d0e8da;
    --color-badge-sentiment-pos-text: var(--color-success);
    --color-badge-sentiment-neg-bg: #e8d0d0;
    --color-badge-sentiment-neg-text: var(--color-error);
    --color-badge-sentiment-neutral-bg: var(--color-gray-200);
    --color-badge-sentiment-neutral-text: var(--color-gray-600);

    /* Focus/accessibility colors */
    --color-focus: var(--color-primary);
    --color-focus-ring: var(--shadow-focus);

    /* Enrichment link colors */
    --color-enrichment-threat-actor: var(--color-orange-600);
    --color-enrichment-malware: var(--color-fuchsia-700);

    /* ============================================
       CHART COLORS (for Plotly/visualization theming)
       ============================================ */

    --color-chart-primary: #5b8fb9;    /* Steel blue */
    --color-chart-secondary: #8a6e9e;  /* Muted plum */
    --color-chart-tertiary: #6b9e78;   /* Sage green */
    --color-chart-quaternary: #c79a4e; /* Muted gold */
    --color-chart-neutral: #7c8e96;    /* Warm blue-gray */
}


/* ============================================
   DARK MODE SUPPORT
   Supports both OS preference and manual toggle
   via data-theme="dark" on <html> element
   ============================================ */

/* Dark mode variables - used by both manual and OS preference */
/* Matching dashboard's article-card colors for consistency */
:root {
    /* Background hierarchy */
    --dark-bg-primary: #0f172a;     /* page background (deepest) */
    --dark-bg-secondary: #1a1a2e;   /* card/surface backgrounds */
    --dark-bg-tertiary: #222238;    /* hover states */
    --dark-bg-input: #151525;       /* input fields */
    --dark-bg-elevated: #252540;    /* elevated elements, dropdowns */
    --dark-bg-accent: #2a2a40;      /* accent backgrounds */

    /* Text hierarchy */
    --dark-text-primary: #e0e0e0;   /* primary text */
    --dark-text-bright: #f0f0f0;    /* headings, emphasized */
    --dark-text-secondary: #c0c0d0; /* secondary text */
    --dark-text-muted: #a0a0b0;     /* muted text */
    --dark-text-tertiary: #64748b;  /* very muted */

    /* Border hierarchy */
    --dark-border-light: #2a2a3e;   /* subtle borders */
    --dark-border-medium: #3a3a4e;  /* default borders */
    --dark-border-strong: #4a4a6a;  /* prominent borders */
    --dark-border-accent: #5a5a7a;  /* accent/focus borders */

    /* Link colors */
    --dark-link: #60a5fa;           /* blue-400 */
    --dark-link-hover: #93c5fd;     /* blue-300 */

    /* Accent gradient (muted, non-purple) */
    --dark-gradient-start: #1e2a3a;
    --dark-gradient-end: #1a1a2e;
    --dark-gradient-border: #3a4a5a;

    /* Brand accent (calm steel-blue, replaces purple) */
    --dark-accent-primary: #7b93c4;
}

/* Manual dark mode override (explicit user choice) */
[data-theme="dark"] {
    /* Core backgrounds - these drive the main page colors */
    --color-background-primary: var(--dark-bg-primary);
    --color-background-secondary: var(--dark-bg-secondary);
    --color-background-tertiary: var(--dark-bg-tertiary);
    --color-surface: var(--dark-bg-secondary);
    --color-surface-hover: var(--dark-bg-tertiary);
    --color-surface-elevated: var(--dark-bg-elevated);
    --color-bg: var(--dark-bg-primary);
    --color-bg-primary: var(--dark-bg-primary);
    --color-bg-secondary: var(--dark-bg-secondary);
    --color-bg-tertiary: var(--dark-bg-tertiary);
    --color-bg-card: var(--dark-bg-secondary);
    --color-bg-input: var(--dark-bg-input);
    --color-bg-hover: var(--dark-bg-tertiary);
    --color-bg-elevated: var(--dark-bg-elevated);
    --color-bg-accent: var(--dark-bg-accent);

    /* Text colors */
    --color-text-primary: var(--dark-text-primary);
    --color-text-secondary: var(--dark-text-secondary);
    --color-text-tertiary: var(--dark-text-tertiary);
    --color-text-bright: var(--dark-text-bright);
    --color-text-disabled: var(--color-gray-500);
    --color-text-muted: var(--dark-text-muted);
    --color-text: var(--dark-text-primary);
    color: var(--dark-text-primary);

    /* Border colors */
    --color-border-light: var(--dark-border-light);
    --color-border-medium: var(--dark-border-medium);
    --color-border-strong: var(--dark-border-strong);
    --color-border-accent: var(--dark-border-accent);
    --color-border: var(--dark-border-medium);

    /* Links */
    --color-link: var(--dark-link);
    --color-link-hover: var(--dark-link-hover);
    --color-link-visited: var(--color-primary-400);

    /* Accent colors */
    --color-primary: var(--color-primary-400);
    --color-primary-hover: var(--color-primary-300);
    --color-accent: #f59e0b;
    --color-accent-hover: #d97706;
    --color-accent-purple: var(--dark-accent-primary);

    /* Card surface (flat, no gradient — Scandinavian minimalism) */
    --gradient-card: var(--dark-bg-secondary);
    --gradient-border: var(--dark-gradient-border);

    /* Shadows (darker for dark mode) */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.15);
}

/* OS preference dark mode (when no explicit choice made) */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]):not([data-theme="dark"]) {
        /* Background Colors (Inverted) */
        --color-background-primary: var(--color-gray-900);
        --color-background-secondary: var(--color-gray-800);
        --color-background-tertiary: var(--color-gray-700);

        /* Text Colors (Inverted) */
        --color-text-primary: var(--color-gray-50);
        --color-text-secondary: var(--color-gray-300);
        --color-text-tertiary: var(--color-gray-400);
        --color-text-disabled: var(--color-gray-500);
        --color-text-muted: #a0a0b0;
        --color-text: var(--color-gray-50);  /* Update shorthand alias */

        /* Border Colors (Darker) */
        --color-border-light: var(--color-gray-700);
        --color-border-medium: var(--color-gray-600);
        --color-border-dark: var(--color-gray-500);
        --color-border: var(--color-gray-600);

        /* Link Colors (Lighter for contrast) */
        --color-link: var(--color-primary-300);
        --color-link-hover: var(--color-primary-200);
        --color-link-visited: var(--color-primary-400);

        /* Alias updates for dark mode */
        --color-bg-card: #1e1e2e;
        --color-bg-input: #2a2a3a;
        --color-bg-hover: var(--color-gray-700);
        --color-primary: var(--color-primary-400);
        --color-primary-hover: var(--color-primary-300);
        --color-accent: #f59e0b;
        --color-accent-hover: #d97706;

        /* Adjust shadows for dark mode */
        --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.15);
    }
}


/* ============================================
   HIGH CONTRAST MODE
   ============================================ */

@media (prefers-contrast: high) {
    :root {
        /* Increase border widths for better visibility */
        --border-width-thin: 2px;
        --border-width-medium: 3px;
        --border-width-thick: 5px;

        /* Stronger shadows */
        --shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, 0.3);
        --shadow-md: 0 6px 10px -1px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 15px 20px -3px rgba(0, 0, 0, 0.3);
    }
}


/* ============================================
   REDUCED MOTION
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    :root {
        /* Disable all transitions */
        --transition-fast: 0ms;
        --transition-base: 0ms;
        --transition-slow: 0ms;
        --transition-slower: 0ms;
    }
}


/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    :root {
        /* Use black/white for printing */
        --color-text-primary: #000000;
        --color-background-primary: #ffffff;

        /* Remove shadows for print */
        --shadow-sm: none;
        --shadow-md: none;
        --shadow-lg: none;
        --shadow-xl: none;
    }
}