:root {
  /* ── Brand Colors ── */
  --color-primary: #0A2558;
  --color-primary-rgb: 10, 37, 88;
  --color-secondary: #1E5FB8;
  --color-secondary-rgb: 30, 95, 184;
  --color-accent: #00A86B;
  --color-accent-rgb: 0, 168, 107;

  /* ── Neutrals ── */
  --color-white: #FFFFFF;
  --color-bg-alt: #F5F7FA;
  --color-gray-100: #F0F2F5;
  --color-gray-200: #E1E5EB;
  --color-gray-300: #C4CAD4;
  --color-gray-400: #8B95A5;
  --color-gray-500: #64708A;
  --color-gray-600: #4A5568;
  --color-gray-700: #2D3748;
  --color-gray-800: #1A202C;
  --color-black: #0B0D17;

  /* ── Semantic ── */
  --color-success: #00A86B;
  --color-error: #E53E3E;
  --color-warning: #F6AD55;
  --color-info: #1E5FB8;

  /* ── Typography ── */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Inter', 'Open Sans', sans-serif;
  --font-mono: 'Fira Code', monospace;

  --fs-xs: clamp(0.7rem, 0.66rem + 0.2vw, 0.8rem);
  --fs-sm: clamp(0.8rem, 0.74rem + 0.3vw, 0.95rem);
  --fs-base: clamp(0.95rem, 0.88rem + 0.35vw, 1.1rem);
  --fs-md: clamp(1.1rem, 1rem + 0.5vw, 1.35rem);
  --fs-lg: clamp(1.35rem, 1.15rem + 1vw, 1.85rem);
  --fs-xl: clamp(1.75rem, 1.4rem + 1.75vw, 2.75rem);
  --fs-2xl: clamp(2.25rem, 1.7rem + 2.75vw, 3.75rem);
  --fs-3xl: clamp(2.75rem, 2rem + 3.75vw, 5rem);

  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;

  --lh-tight: 1.2;
  --lh-normal: 1.6;
  --lh-relaxed: 1.8;

  /* ── Spacing ── */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* ── Layout ── */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1200px;
  --container-2xl: 1440px;

  /* ── Borders ── */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* ── Shadows ── */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 16px 50px rgba(0, 0, 0, 0.15);
  --shadow-card: 0 2px 16px rgba(10, 37, 88, 0.08);
  --shadow-card-hover: 0 8px 32px rgba(10, 37, 88, 0.16);

  /* ── Transitions ── */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ── Z-Index ── */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;

  /* ── Header ── */
  --header-height: 80px;
}