/**
 * 🎨 BotEnSky Design System
 * Modern CSS Variables & Design Tokens
 * Mobile-first, nature-inspired palette
 */

:root {
  /* ========================================
     🌈 COLOR PALETTE - LIGHT MODE (Default)
     ======================================== */
  
  /* Primary Colors - Nature Green */
  --bes-primary: #2D6A4F;
  --bes-primary-light: #40916C;
  --bes-primary-dark: #1B4332;
  --bes-primary-rgb: 45, 106, 79;
  
  /* Secondary Colors - Prairie Green */
  --bes-secondary: #52B788;
  --bes-secondary-light: #74C69D;
  --bes-secondary-dark: #2D6A4F;
  --bes-secondary-rgb: 82, 183, 136;
  
  /* Accent Colors - Sky Blue */
  --bes-accent: #74C0FC;
  --bes-accent-light: #A5D8FF;
  --bes-accent-dark: #339AF0;
  --bes-accent-rgb: 116, 192, 252;
  
  /* Neutral Colors */
  --bes-background: #FEFCF3;
  --bes-surface: #FFFFFF;
  --bes-surface-glass: rgba(255, 255, 255, 0.7);
  --bes-surface-hover: rgba(255, 255, 255, 0.9);
  
  /* Text Colors */
  --bes-text-primary: #1B263B;
  --bes-text-secondary: #415A77;
  --bes-text-tertiary: #778DA9;
  --bes-text-inverse: #FFFFFF;
  
  /* Border Colors */
  --bes-border-light: rgba(27, 38, 59, 0.1);
  --bes-border-medium: rgba(27, 38, 59, 0.2);
  --bes-border-strong: rgba(27, 38, 59, 0.3);
  
  /* Status Colors */
  --bes-success: #52B788;
  --bes-warning: #F4A261;
  --bes-error: #E76F51;
  --bes-info: #74C0FC;
  
  /* ========================================
     📏 SPACING SYSTEM (4pt base)
     ======================================== */
  --bes-space-1: 0.25rem;   /* 4px */
  --bes-space-2: 0.5rem;    /* 8px */
  --bes-space-3: 0.75rem;   /* 12px */
  --bes-space-4: 1rem;      /* 16px */
  --bes-space-5: 1.5rem;    /* 24px */
  --bes-space-6: 2rem;      /* 32px */
  --bes-space-8: 3rem;      /* 48px */
  --bes-space-10: 4rem;     /* 64px */
  --bes-space-12: 6rem;     /* 96px */
  --bes-space-16: 8rem;     /* 128px */
  
  /* ========================================
     🔤 TYPOGRAPHY
     ======================================== */
  
  /* Font Families */
  --bes-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 
                   'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --bes-font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --bes-font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  
  /* Font Sizes */
  --bes-text-xs: 0.75rem;      /* 12px */
  --bes-text-sm: 0.875rem;     /* 14px */
  --bes-text-base: 1rem;       /* 16px */
  --bes-text-lg: 1.125rem;     /* 18px */
  --bes-text-xl: 1.25rem;      /* 20px */
  --bes-text-2xl: 1.5rem;      /* 24px */
  --bes-text-3xl: 1.875rem;    /* 30px */
  --bes-text-4xl: 2.25rem;     /* 36px */
  --bes-text-5xl: 3rem;        /* 48px */
  --bes-text-6xl: 3.75rem;     /* 60px */
  
  /* Font Weights */
  --bes-font-normal: 400;
  --bes-font-medium: 500;
  --bes-font-semibold: 600;
  --bes-font-bold: 700;
  
  /* Line Heights */
  --bes-leading-tight: 1.25;
  --bes-leading-normal: 1.5;
  --bes-leading-relaxed: 1.75;
  --bes-leading-loose: 2;
  
  /* ========================================
     📐 BORDER RADIUS
     ======================================== */
  --bes-radius-sm: 0.375rem;   /* 6px */
  --bes-radius-base: 0.5rem;   /* 8px */
  --bes-radius-md: 0.75rem;    /* 12px */
  --bes-radius-lg: 1rem;       /* 16px */
  --bes-radius-xl: 1.5rem;     /* 24px */
  --bes-radius-2xl: 2rem;      /* 32px */
  --bes-radius-full: 9999px;   /* Pill shape */
  
  /* ========================================
     🌑 SHADOWS (5 levels of elevation)
     ======================================== */
  --bes-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --bes-shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1),
                     0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --bes-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
                   0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --bes-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
                   0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --bes-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
                   0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --bes-shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Colored Shadows */
  --bes-shadow-primary: 0 10px 40px -10px rgba(var(--bes-primary-rgb), 0.3);
  --bes-shadow-accent: 0 10px 40px -10px rgba(var(--bes-accent-rgb), 0.3);
  
  /* ========================================
     ⏱️ TRANSITIONS & ANIMATIONS
     ======================================== */
  
  /* Durations */
  --bes-duration-fast: 150ms;
  --bes-duration-base: 250ms;
  --bes-duration-slow: 400ms;
  --bes-duration-slower: 600ms;
  
  /* Easing Functions */
  --bes-ease-in: cubic-bezier(0.4, 0, 1, 1);
  --bes-ease-out: cubic-bezier(0, 0, 0.2, 1);
  --bes-ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --bes-ease-bounce: cubic-bezier(0.16, 1, 0.3, 1);
  
  /* Standard Transitions */
  --bes-transition-fast: all var(--bes-duration-fast) var(--bes-ease-in-out);
  --bes-transition-base: all var(--bes-duration-base) var(--bes-ease-in-out);
  --bes-transition-slow: all var(--bes-duration-slow) var(--bes-ease-bounce);
  
  /* ========================================
     📱 BREAKPOINTS (for reference in media queries)
     ======================================== */
  --bes-screen-sm: 640px;
  --bes-screen-md: 768px;
  --bes-screen-lg: 1024px;
  --bes-screen-xl: 1280px;
  --bes-screen-2xl: 1536px;
  
  /* ========================================
     🎯 Z-INDEX SCALE
     ======================================== */
  --bes-z-base: 0;
  --bes-z-dropdown: 1000;
  --bes-z-sticky: 1020;
  --bes-z-fixed: 1030;
  --bes-z-modal-backdrop: 1040;
  --bes-z-modal: 1050;
  --bes-z-popover: 1060;
  --bes-z-tooltip: 1070;
}

/* ========================================
   🌙 DARK MODE
   ======================================== */

[data-theme="dark"] {
  /* Primary Colors - Brighter for dark bg */
  --bes-primary: #52B788;
  --bes-primary-light: #74C69D;
  --bes-primary-dark: #40916C;
  --bes-primary-rgb: 82, 183, 136;
  
  /* Secondary Colors */
  --bes-secondary: #2D6A4F;
  --bes-secondary-light: #40916C;
  --bes-secondary-dark: #1B4332;
  --bes-secondary-rgb: 45, 106, 79;
  
  /* Accent Colors - More vibrant */
  --bes-accent: #339AF0;
  --bes-accent-light: #74C0FC;
  --bes-accent-dark: #1C7ED6;
  --bes-accent-rgb: 51, 154, 240;
  
  /* Backgrounds - Dark navy */
  --bes-background: #0D1B2A;
  --bes-surface: #1E293B;
  --bes-surface-glass: rgba(30, 41, 59, 0.7);
  --bes-surface-hover: rgba(30, 41, 59, 0.9);
  
  /* Text Colors - Inverted */
  --bes-text-primary: #E0E1DD;
  --bes-text-secondary: #B0B4BA;
  --bes-text-tertiary: #778DA9;
  --bes-text-inverse: #0D1B2A;
  
  /* Borders - Lighter for dark mode */
  --bes-border-light: rgba(224, 225, 221, 0.1);
  --bes-border-medium: rgba(224, 225, 221, 0.2);
  --bes-border-strong: rgba(224, 225, 221, 0.3);
  
  /* Shadows - Deeper in dark mode */
  --bes-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --bes-shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.4),
                     0 1px 2px -1px rgba(0, 0, 0, 0.4);
  --bes-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4),
                   0 2px 4px -2px rgba(0, 0, 0, 0.4);
  --bes-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5),
                   0 4px 6px -4px rgba(0, 0, 0, 0.5);
  --bes-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6),
                   0 8px 10px -6px rgba(0, 0, 0, 0.6);
  --bes-shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
}

/* ========================================
   🎨 UTILITY CLASSES
   ======================================== */

/* Text Colors */
.text-primary { color: var(--bes-text-primary); }
.text-secondary { color: var(--bes-text-secondary); }
.text-tertiary { color: var(--bes-text-tertiary); }
.text-inverse { color: var(--bes-text-inverse); }

/* Background Colors */
.bg-primary { background-color: var(--bes-primary); }
.bg-secondary { background-color: var(--bes-secondary); }
.bg-accent { background-color: var(--bes-accent); }
.bg-surface { background-color: var(--bes-surface); }

/* Transitions */
.transition-fast { transition: var(--bes-transition-fast); }
.transition-base { transition: var(--bes-transition-base); }
.transition-slow { transition: var(--bes-transition-slow); }

/* Border Radius */
.rounded-sm { border-radius: var(--bes-radius-sm); }
.rounded { border-radius: var(--bes-radius-base); }
.rounded-md { border-radius: var(--bes-radius-md); }
.rounded-lg { border-radius: var(--bes-radius-lg); }
.rounded-xl { border-radius: var(--bes-radius-xl); }
.rounded-full { border-radius: var(--bes-radius-full); }

/* Shadows */
.shadow-sm { box-shadow: var(--bes-shadow-sm); }
.shadow { box-shadow: var(--bes-shadow-base); }
.shadow-md { box-shadow: var(--bes-shadow-md); }
.shadow-lg { box-shadow: var(--bes-shadow-lg); }
.shadow-xl { box-shadow: var(--bes-shadow-xl); }
.shadow-2xl { box-shadow: var(--bes-shadow-2xl); }

/* ========================================
   🌐 GLOBAL STYLES
   ======================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--bes-font-sans);
  font-size: var(--bes-text-base);
  font-weight: var(--bes-font-normal);
  line-height: var(--bes-leading-normal);
  color: var(--bes-text-primary);
  background-color: var(--bes-background);
  transition: background-color var(--bes-duration-base) var(--bes-ease-in-out),
              color var(--bes-duration-base) var(--bes-ease-in-out);
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--bes-font-display);
  font-weight: var(--bes-font-bold);
  line-height: var(--bes-leading-tight);
  color: var(--bes-text-primary);
}

h1 { font-size: var(--bes-text-5xl); }
h2 { font-size: var(--bes-text-4xl); }
h3 { font-size: var(--bes-text-3xl); }
h4 { font-size: var(--bes-text-2xl); }
h5 { font-size: var(--bes-text-xl); }
h6 { font-size: var(--bes-text-lg); }

p {
  margin-bottom: var(--bes-space-4);
}

a {
  color: var(--bes-primary);
  text-decoration: none;
  transition: var(--bes-transition-fast);
}

a:hover {
  color: var(--bes-primary-light);
  text-decoration: underline;
}

/* Focus States (Accessibility) */
*:focus-visible {
  outline: 2px solid var(--bes-accent);
  outline-offset: 2px;
}

/* Selection */
::selection {
  background-color: var(--bes-primary);
  color: var(--bes-text-inverse);
}

/* Responsive Typography */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  h1 { font-size: var(--bes-text-4xl); }
  h2 { font-size: var(--bes-text-3xl); }
  h3 { font-size: var(--bes-text-2xl); }
}