:root {
  /* Core Color Palette */
  --color-bg: #F5F6F3;
  --color-surface: #FFFFFF;
  --color-surface-subtle: #E5ECE7;
  --color-petrol: #24464B;
  --color-petrol-dark: #1A3438;
  --color-petrol-light: #325D63;
  --color-charcoal: #252C2E;
  --color-charcoal-muted: #566466;
  --color-copper: #A95332;
  --color-copper-hover: #8C4226;
  --color-copper-light: #FBF0EB;
  --color-border: #D8DFDF;
  --color-border-subtle: #E8EEEE;
  
  /* Semantic Status Colors */
  --color-success: #1E6B48;
  --color-success-bg: #EAF5EF;
  --color-warning: #995B00;
  --color-warning-bg: #FFF7E6;
  --color-danger: #B42318;
  --color-danger-bg: #FEF3F2;
  --color-info: #026AA2;
  --color-info-bg: #F0F9FF;

  /* Typography */
  --font-heading: 'Alexandria', -apple-system, BlinkMacSystemFont, 'Segoe UI', Tahoma, sans-serif;
  --font-body: 'IBM Plex Sans Arabic', -apple-system, BlinkMacSystemFont, 'Segoe UI', Tahoma, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Type Scale */
  --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 */

  /* Spacing Scale (Logical) */
  --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 */

  /* Border Radii */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows (Subtle, professional, no heavy muddy blur) */
  --shadow-xs: 0 1px 2px rgba(36, 70, 75, 0.05);
  --shadow-sm: 0 1px 3px rgba(36, 70, 75, 0.08), 0 1px 2px rgba(36, 70, 75, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(36, 70, 75, 0.08), 0 2px 4px -2px rgba(36, 70, 75, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(36, 70, 75, 0.08), 0 4px 6px -4px rgba(36, 70, 75, 0.03);
  --shadow-focus: 0 0 0 3px rgba(169, 83, 50, 0.35);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 220ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout Max Widths */
  --container-max: 1280px;
  --container-narrow: 840px;

  /* Z-Index Hierarchy */
  --z-base: 1;
  --z-sticky: 100;
  --z-dropdown: 200;
  --z-drawer: 300;
  --z-modal: 400;
  --z-toast: 500;
  --z-bottom-nav: 250;
}