/* ==========================================================================
   SERENITY TRACKER - DESIGN TOKENS & THEMING
   ========================================================================== */

:root {
  /* ===== Color System ===== */
  /* Primary Colors */
  --color-primary-50: #f0f7ed;
  --color-primary-100: #d9edcf;
  --color-primary-200: #b8dba8;
  --color-primary-300: #8fc27a;
  --color-primary-400: #6ba754;
  --color-primary-500: #4d8b38;
  --color-primary-600: #3a6e29;
  --color-primary-700: #2d5621;
  --color-primary-800: #23451c;
  --color-primary-900: #1a3616;
  
  /* Neutral Colors */
  --color-neutral-50: #f9fafb;
  --color-neutral-100: #f3f4f6;
  --color-neutral-200: #e5e7eb;
  --color-neutral-300: #d1d5db;
  --color-neutral-400: #9ca3af;
  --color-neutral-500: #6b7280;
  --color-neutral-600: #4b5563;
  --color-neutral-700: #374151;
  --color-neutral-800: #1f2937;
  --color-neutral-900: #111827;
  
  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  
  /* Background Colors */
  --color-bg-light: var(--color-neutral-50);
  --color-bg-lighter: #ffffff;
  --color-bg-dark: var(--color-neutral-900);
  --color-bg-darker: #0a0c10;
  
  /* Text Colors */
  --color-text: var(--color-neutral-800);
  --color-text-muted: var(--color-neutral-600);
  --color-text-light: var(--color-neutral-100);
  --color-text-on-primary: #ffffff;
  
  /* Border Colors */
  --color-border: var(--color-neutral-200);
  --color-border-dark: var(--color-neutral-300);
  
  /* ===== Typography ===== */
  --font-family-sans: 'Lexend', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-serif: 'Spectral', Georgia, 'Times New Roman', serif;
  --font-family-mono: 'Roboto Mono', 'Courier New', monospace;
  
  --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-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;
  
  /* ===== 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 ===== */
  --radius-sm: 0.25rem;   /* 4px */
  --radius: 0.375rem;     /* 6px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-2xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;  /* Full circle */
  
  /* ===== Shadows ===== */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 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);
  --shadow-none: none;
  
  /* ===== Transitions & Animations ===== */
  --transition-speed-fast: 150ms;
  --transition-speed-normal: 300ms;
  --transition-speed-slow: 500ms;
  
  --transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  
  /* ===== Z-Index ===== */
  --z-index-below: -1;
  --z-index-0: 0;
  --z-index-10: 10;
  --z-index-20: 20;
  --z-index-30: 30;
  --z-index-40: 40;
  --z-index-50: 50;
  --z-index-auto: auto;
  
  /* ===== Layout ===== */
  --header-height: 4rem;
  --footer-height: 4rem;
  --max-container-width: 80rem;
  --content-padding: 1.5rem;
  
  /* ===== Accessibility ===== */
  --focus-ring-width: 3px;
  --focus-ring-color: rgba(77, 139, 56, 0.5);
  --focus-ring-offset: 2px;
}

/* ==========================================================================
   DARK THEME OVERRIDES
   ========================================================================== */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-light: var(--color-neutral-900);
    --color-bg-lighter: var(--color-neutral-800);
    --color-bg-dark: var(--color-neutral-100);
    --color-bg-darker: #ffffff;
    
    --color-text: var(--color-neutral-100);
    --color-text-muted: var(--color-neutral-400);
    --color-text-light: var(--color-neutral-900);
    
    --color-border: var(--color-neutral-700);
    --color-border-dark: var(--color-neutral-600);
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.25);
  }
}

/* ==========================================================================
   REDUCED MOTION OVERRIDES
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */
@media print {
  :root {
    --color-bg-light: #fff;
    --color-bg-lighter: #fff;
    --color-text: #000;
    --color-text-muted: #444;
    --color-border: #ddd;
  }
  
  *,
  *::before,
  *::after {
    text-shadow: none !important;
    box-shadow: none !important;
  }
}