/**
 * AI Classifier Design System - Design Tokens
 * Version: 1.0.0
 *
 * Shared design tokens for consistent styling across all properties:
 * - Dashboard (app.aiclassifier.tech)
 * - Marketing (aiclassifier.tech)
 * - Blog (/blog)
 * - Help Center (/help)
 */

:root {
  /* ===========================================
     COLORS - Google Official Palette
     =========================================== */

  /* Primary Brand */
  --color-primary: #4285f4;
  --color-primary-dark: #3367d6;
  --color-primary-light: #669df6;
  --color-primary-bg: rgba(66, 133, 244, 0.08);

  /* Secondary (Success) */
  --color-secondary: #34a853;
  --color-secondary-dark: #2d8a45;
  --color-secondary-light: #5cb176;
  --color-secondary-bg: rgba(52, 168, 83, 0.08);

  /* Accent (Warning) */
  --color-accent: #fbbc04;
  --color-accent-dark: #f9ab00;
  --color-accent-light: #fdd663;
  --color-accent-bg: rgba(251, 188, 4, 0.08);

  /* Error */
  --color-error: #ea4335;
  --color-error-dark: #c5221f;
  --color-error-light: #f28b82;
  --color-error-bg: rgba(234, 67, 53, 0.08);

  /* Neutral Grays */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Semantic Colors */
  --color-text-primary: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-600);
  --color-text-muted: var(--color-gray-400);
  --color-text-inverse: #ffffff;

  --color-bg-page: var(--color-gray-50);
  --color-bg-card: #ffffff;
  --color-bg-elevated: #ffffff;
  --color-bg-overlay: rgba(0, 0, 0, 0.5);

  --color-border: var(--color-gray-200);
  --color-border-light: rgba(0, 0, 0, 0.04);
  --color-border-focus: var(--color-primary);

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

  /* Font Family */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', Consolas, Monaco, 'Courier New', 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-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-snug: 1.4;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

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

  --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 */

  /* ===========================================
     BORDER RADIUS - Modern, Rounded
     =========================================== */

  --radius-none: 0;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-3xl: 32px;
  --radius-full: 9999px;

  /* ===========================================
     SHADOWS - Layered, Subtle
     =========================================== */

  /* Bento-style shadows - subtle, layered */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);

  /* Bento card shadow - clean, modern */
  --shadow-bento: 0 0 0 1px rgba(0, 0, 0, 0.03), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-bento-hover: 0 0 0 1px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-bento-active: 0 0 0 2px var(--color-primary), 0 8px 24px rgba(66, 133, 244, 0.15);

  /* Colored shadows for buttons */
  --shadow-primary: 0 4px 14px rgba(66, 133, 244, 0.3);
  --shadow-primary-hover: 0 8px 24px rgba(66, 133, 244, 0.4);
  --shadow-success: 0 4px 14px rgba(52, 168, 83, 0.3);
  --shadow-error: 0 4px 14px rgba(234, 67, 53, 0.3);

  /* ===========================================
     TRANSITIONS - Smooth, Intentional
     =========================================== */

  /* Durations */
  --duration-fast: 150ms;
  --duration-base: 200ms;
  --duration-slow: 300ms;
  --duration-slower: 400ms;

  /* Easing */
  --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(0.34, 1.56, 0.64, 1);

  /* Common transitions */
  --transition-base: var(--duration-base) var(--ease-in-out);
  --transition-fast: var(--duration-fast) var(--ease-in-out);
  --transition-slow: var(--duration-slow) var(--ease-in-out);
  --transition-transform: transform var(--duration-base) var(--ease-in-out);
  --transition-opacity: opacity var(--duration-base) var(--ease-in-out);
  --transition-colors: color var(--duration-base) var(--ease-in-out),
                       background-color var(--duration-base) var(--ease-in-out),
                       border-color var(--duration-base) var(--ease-in-out);
  --transition-all: all var(--duration-base) var(--ease-in-out);

  /* ===========================================
     Z-INDEX SCALE
     =========================================== */

  --z-base: 0;
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-fixed: 30;
  --z-modal-backdrop: 40;
  --z-modal: 50;
  --z-popover: 60;
  --z-tooltip: 70;
  --z-toast: 80;

  /* ===========================================
     BREAKPOINTS (for reference in JS)
     =========================================== */

  --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;
}

/* ===========================================
   LEGACY VARIABLE ALIASES
   (for backward compatibility with existing code)
   =========================================== */

:root {
  /* Map old variable names to new design tokens */
  --primary: var(--color-primary);
  --primary-dark: var(--color-primary-dark);
  --secondary: var(--color-secondary);
  --accent: var(--color-accent);
  --error: var(--color-error);
  --danger: var(--color-error);
  --warning: var(--color-accent);

  --gray-50: var(--color-gray-50);
  --gray-100: var(--color-gray-100);
  --gray-200: var(--color-gray-200);
  --gray-300: var(--color-gray-300);
  --gray-400: var(--color-gray-400);
  --gray-500: var(--color-gray-500);
  --gray-600: var(--color-gray-600);
  --gray-700: var(--color-gray-700);
  --gray-800: var(--color-gray-800);
  --gray-900: var(--color-gray-900);
}

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

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-page);
}

/* ===========================================
   UTILITY CLASSES - Text Colors
   =========================================== */

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-accent { color: var(--color-accent); }
.text-error { color: var(--color-error); }
.text-muted { color: var(--color-text-muted); }

/* ===========================================
   UTILITY CLASSES - Backgrounds
   =========================================== */

.bg-primary { background-color: var(--color-primary); }
.bg-primary-light { background-color: var(--color-primary-bg); }
.bg-secondary { background-color: var(--color-secondary); }
.bg-secondary-light { background-color: var(--color-secondary-bg); }
.bg-accent { background-color: var(--color-accent); }
.bg-accent-light { background-color: var(--color-accent-bg); }
.bg-error { background-color: var(--color-error); }
.bg-error-light { background-color: var(--color-error-bg); }
.bg-white { background-color: #ffffff; }
.bg-gray-50 { background-color: var(--color-gray-50); }
.bg-gray-100 { background-color: var(--color-gray-100); }