/**
 * MissionMind.ai - CSS Variables & Design Tokens
 * ================================================
 * Centralized design system variables for consistent styling.
 * Modify these values to update the entire site's appearance.
 */

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

  /* Primary Brand Colors - Blue Theme */
  --color-primary: #2340FF;
  --color-primary-light: #436BFF;
  --color-primary-dark: #172FEB;
  --color-primary-25: #F5FAFF;
  --color-primary-50: #EAF4FF;
  --color-primary-100: #D9EAFF;
  --color-primary-200: #BBD8FF;
  --color-primary-300: #92BCFF;
  --color-primary-400: #6693FF;
  --color-primary-500: #436BFF;
  --color-primary-600: #2340FF;
  --color-primary-700: #172FEB;
  --color-primary-800: #162CBD;
  --color-primary-900: #1B2D91;
  --color-primary-950: #101856;

  /* MissionMind Brand Accent - Blue */
  --mm-accent: #2340FF;

  /* Secondary/Accent Colors - Gold */
  --color-secondary: #D4A853;
  --color-secondary-light: #E8C078;
  --color-secondary-dark: #B8923F;

  /* Gold Accent (Alias) */
  --color-gold: #D4A853;
  --color-gold-light: #E8C078;
  --color-gold-dark: #B8923F;

  /* Text Colors (Gray Scale) */
  --text-50: #F7F7F8;
  --text-100: #EFEDF1;
  --text-200: #DAD8DF;
  --text-300: #B9B6C3;
  --text-400: #938EA2;
  --text-500: #767087;
  --text-600: #605B6E;
  --text-700: #4F4A5A;
  --text-800: #45414E;
  --text-900: #3C3842;
  --text-950: #28252C;

  /* Neutral Colors */
  --color-white: #ffffff;
  --color-black: #000000;
  --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-success: #10b981;
  --color-success-light: #d1fae5;
  --color-warning: #f59e0b;
  --color-warning-light: #fef3c7;
  --color-error: #ef4444;
  --color-error-light: #fee2e2;
  --color-info: #3b82f6;
  --color-info-light: #dbeafe;

  /* Gradient Colors */
  --gradient-primary: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-500) 100%);
  --gradient-primary-gold: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-gold) 100%);
  --gradient-hero: linear-gradient(135deg, #0a0d14 0%, #0d1020 25%, var(--color-primary-950) 75%, #0f1328 100%);
  --gradient-dark: linear-gradient(180deg, var(--color-primary-950) 0%, #0d1020 100%);
  --gradient-light: linear-gradient(180deg, var(--color-white) 0%, var(--color-primary-25) 100%);
  --gradient-gold: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-light) 100%);

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

  /* Font Families */
  --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Fira Code', 'Monaco', 'Consolas', 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 */
  --text-7xl: 4.5rem;     /* 72px */

  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

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

  /* Letter Spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;

  /* ===================
     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 */
  --space-32: 8rem;     /* 128px */

  /* Section Spacing */
  --section-padding-y: var(--space-20);
  --section-padding-x: var(--space-6);

  /* ===================
     LAYOUT
     =================== */

  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1440px;
  --container-max: 1600px;

  /* Grid */
  --grid-columns: 12;
  --grid-gap: var(--space-6);

  /* ===================
     BORDERS & RADIUS
     =================== */

  --radius-none: 0;
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.375rem;  /* 6px */
  --radius-lg: 0.5rem;    /* 8px */
  --radius-xl: 0.75rem;   /* 12px */
  --radius-2xl: 1rem;     /* 16px */
  --radius-3xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;

  --border-width: 1px;
  --border-color: var(--color-gray-200);

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

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --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);
  --shadow-glow: 0 0 40px rgba(35, 64, 255, 0.3);
  --shadow-primary: 0 4px 16px rgba(35, 64, 255, 0.35);
  --shadow-gold: 0 4px 16px rgba(212, 168, 83, 0.35);

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

  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  --transition-slower: 700ms ease;

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

  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;

  /* ===================
     COMPONENT SPECIFIC
     =================== */

  /* Header */
  --header-height: 80px;
  --header-height-scrolled: 64px;
  --header-bg: linear-gradient(135deg, rgba(22, 44, 189, 0.95) 0%, rgba(45, 35, 140, 0.95) 100%);
  --header-bg-scrolled: linear-gradient(135deg, rgba(22, 44, 189, 0.98) 0%, rgba(45, 35, 140, 0.98) 100%);

  /* Buttons */
  --btn-padding-x: var(--space-6);
  --btn-padding-y: var(--space-3);
  --btn-font-size: var(--text-base);
  --btn-font-weight: var(--font-semibold);
  --btn-radius: var(--radius-lg);

  /* Cards */
  --card-padding: var(--space-6);
  --card-radius: var(--radius-xl);
  --card-shadow: var(--shadow-lg);
  --card-bg: var(--color-white);

  /* Forms */
  --input-padding-x: var(--space-4);
  --input-padding-y: var(--space-3);
  --input-radius: var(--radius-lg);
  --input-border: var(--border-color);
  --input-focus-ring: var(--color-primary-600);
}

/* Dark Mode Variables (optional) */
@media (prefers-color-scheme: dark) {
  :root.auto-dark {
    --color-gray-50: #111827;
    --color-gray-100: #1f2937;
    --color-gray-200: #374151;
    --color-gray-700: #d1d5db;
    --color-gray-800: #e5e7eb;
    --color-gray-900: #f9fafb;
    --card-bg: #1f2937;
    --header-bg: rgba(17, 24, 39, 0.95);
  }
}