:root {
  /* Primary Colors - Dark & Bold Theme */
  --color-primary: #6366F1;        /* Vibrant Indigo */
  --color-primary-dark: #4F46E5;   /* Darker Indigo */
  --color-primary-light: #818CF8;  /* Lighter Indigo */

  --color-accent: #EC4899;         /* Hot Pink - Bold accent */
  --color-accent-dark: #DB2777;    /* Darker Pink */
  --color-accent-light: #F472B6;   /* Lighter Pink */

  --color-secondary: #10B981;      /* Emerald Green */
  --color-secondary-dark: #059669; /* Darker Green */

  /* Dark Theme Background Colors */
  --color-bg-primary: #0F172A;     /* Very Dark Blue-Gray */
  --color-bg-secondary: #1E293B;   /* Dark Blue-Gray */
  --color-bg-tertiary: #334155;    /* Medium Blue-Gray */

  /* Text Colors for Dark Theme */
  --color-text-primary: #F8FAFC;   /* Almost White */
  --color-text-secondary: #CBD5E1; /* Light Gray */
  --color-text-muted: #94A3B8;     /* Muted Gray */

  /* Additional Colors */
  --color-success: #10B981;        /* Green */
  --color-warning: #F59E0B;        /* Amber */
  --color-danger: #EF4444;         /* Red */
  --color-info: #3B82F6;           /* Blue */

  /* Spacing Scale (8px base) */
  --spacing-xs: 0.25rem;    /* 4px */
  --spacing-sm: 0.5rem;     /* 8px */
  --spacing-md: 1rem;       /* 16px */
  --spacing-lg: 1.5rem;     /* 24px */
  --spacing-xl: 2rem;       /* 32px */
  --spacing-2xl: 3rem;      /* 48px */
  --spacing-3xl: 4rem;      /* 64px */
  --spacing-4xl: 6rem;      /* 96px */
  --spacing-5xl: 8rem;      /* 128px */

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  --font-family-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', 'Droid Sans Mono', 'Source Code Pro', 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-size-6xl: 3.75rem;   /* 60px */

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Border Radius */
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-2xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;  /* Fully rounded */

  /* Shadows - Enhanced for dark theme */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);

  /* Glow effects for dark theme */
  --glow-primary: 0 0 20px rgba(99, 102, 241, 0.4);
  --glow-accent: 0 0 20px rgba(236, 72, 153, 0.4);
  --glow-secondary: 0 0 20px rgba(16, 185, 129, 0.4);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Breakpoints (for reference in media queries) */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;

  /* Z-index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* Dark theme specific adjustments */
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
  }
}