:root {
  /* Brand Primary Colors */
  --primary: #4F46E5;
  --primary-light: #6366F1;
  --primary-dark: #4338CA;
  --primary-50: #EEF2FF;
  --primary-100: #E0E7FF;
  --primary-500: #6366F1;
  --primary-600: #4F46E5;
  --primary-700: #4338CA;
  
  /* Secondary & Accents */
  --secondary: #0EA5E9;
  --secondary-light: #38BDF8;
  --secondary-dark: #0284C7;
  --accent: #8B5CF6;
  --accent-light: #A78BFA;
  
  /* Status & Feedback */
  --success: #10B981;
  --success-light: #34D399;
  --success-bg: #ECFDF5;
  --warning: #F59E0B;
  --warning-light: #FBBF24;
  --warning-bg: #FFFBEB;
  --error: #EF4444;
  --error-light: #F87171;
  --error-bg: #FEF2F2;
  --info: #3B82F6;
  --info-light: #60A5FA;
  --info-bg: #EFF6FF;

  /* Aliases for legacy / template classes */
  --color-primary: var(--primary);
  --color-primary-dark: var(--primary-dark);
  --color-secondary: var(--secondary);
  --color-success: var(--success);
  --color-warning: var(--warning);
  --color-error: var(--error);
  --color-dark: #0F172A;
  --color-light: #F8FAFC;
  --color-border: #E2E8F0;
  
  /* Neutrals (Slate Palette) */
  --white: #FFFFFF;
  --gray-25: #FCFCFD;
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;
  --gray-950: #020617;
  --black: #000000;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: 'Plus Jakarta Sans', var(--font-primary);
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  
  /* Font Sizes */
  --text-2xs: 0.6875rem; /* 11px */
  --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 */
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  
  /* Spacing */
  --space-0-5: 0.125rem;
  --space-1: 0.25rem;
  --space-1-5: 0.375rem;
  --space-2: 0.5rem;
  --space-2-5: 0.625rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* Border Radius */
  --radius-xs: 0.25rem;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Modern Soft Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.08), 0 1px 2px -1px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 8px -2px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 20px -4px rgba(15, 23, 42, 0.08), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
  --shadow-xl: 0 20px 28px -6px rgba(15, 23, 42, 0.1), 0 8px 10px -4px rgba(15, 23, 42, 0.04);
  --shadow-2xl: 0 28px 48px -12px rgba(15, 23, 42, 0.16);
  --shadow-card: 0 1px 3px 0 rgba(15, 23, 42, 0.04), 0 1px 2px -1px rgba(15, 23, 42, 0.02);
  --shadow-card-hover: 0 12px 24px -6px rgba(15, 23, 42, 0.08), 0 4px 8px -2px rgba(15, 23, 42, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-index */
  --z-base: 1;
  --z-sticky: 100;
  --z-header: 500;
  --z-sidebar: 800;
  --z-backdrop: 900;
  --z-dropdown: 1000;
  --z-modal: 1050;
  --z-toast: 1100;
  
  /* Container Sizes */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  
  /* App Layout */
  --sidebar-width: 260px;
  --sidebar-collapsed: 72px;
  --header-height: 64px;
}