/* ============================================================
   DESIGN TOKENS — MAC OBSERVATORY GHOST THEME
   ============================================================ */
:root {
  /* Typography */
  --font-heading: 'futura-pt', 'SF Pro Display', -apple-system, system-ui, sans-serif;
  --font-body: 'futura-pt', 'SF Pro Text', -apple-system, system-ui, sans-serif;
  --font-mono: 'SF Mono', 'Menlo', 'Consolas', monospace;
  --font-ui: 'futura-pt', 'SF Pro Text', -apple-system, system-ui, sans-serif;

  /* Type Scale (modular, 1.25 ratio) */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-md: 1.125rem;    /* 18px */
  --text-lg: 1.25rem;     /* 20px */
  --text-xl: 1.5rem;      /* 24px */
  --text-2xl: 1.875rem;   /* 30px */
  --text-3xl: 2.25rem;    /* 36px */
  --text-4xl: 3rem;       /* 48px */
  --text-5xl: 3.75rem;    /* 60px */
  --text-6xl: 4.5rem;     /* 72px */

  /* Font Weights */
  --weight-book: 400;
  --weight-medium: 500;
  --weight-demi: 600;
  --weight-bold: 700;
  --weight-heavy: 800;

  /* Line Heights */
  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.65;
  --leading-loose: 1.8;

  /* Letter Spacing */
  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.05em;
  --tracking-wider: 0.1em;
  --tracking-widest: 0.15em;

  /* Colors — Brand */
  --color-red: hsl(268, 70%, 42%);
  --color-red-hover: hsl(268, 70%, 35%);
  --color-red-light: hsl(268, 70%, 95%);
  --color-red-dark: hsl(268, 70%, 30%);

  /* Colors — App Accents */
  --color-laminar: #32D74B;
  --color-laminar-dark: #28a83c;
  --color-strata: #D97706;
  --color-strata-dark: #b56105;
  --color-meridian: #0891B2;
  --color-meridian-dark: #067a96;

  /* Colors — Neutral */
  --color-white: #FFFFFF;
  --color-gray-50: #FAFAFA;
  --color-gray-100: #F5F5F5;
  --color-gray-150: #EEEEEE;
  --color-gray-200: #E5E5E5;
  --color-gray-300: #D4D4D4;
  --color-gray-400: #8A8A8A;
  --color-gray-500: #737373;
  --color-gray-600: #525252;
  --color-gray-700: #404040;
  --color-gray-800: #262626;
  --color-gray-900: #171717;
  --color-black: #0A0A0A;

  /* Colors — Space */
  --color-space: #0B0E14;
  --color-space-light: #141820;
  --color-space-lighter: #1C2230;

  /* Colors — Semantic (WCAG AA compliant) */
  --color-link: var(--color-red);
  --color-link-hover: var(--color-red-hover);
  --color-text: var(--color-gray-800);
  --color-text-secondary: var(--color-gray-600);   /* 7.1:1 — was gray-500 */
  --color-text-light: var(--color-gray-500);        /* 4.6:1 — was gray-400 */
  --color-bg: var(--color-white);
  --color-bg-alt: var(--color-gray-50);
  --color-border: var(--color-gray-300);            /* was gray-200 */
  --color-border-light: var(--color-gray-200);      /* was gray-150 */

  /* Spacing */
  --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 */
  --space-32: 8rem;     /* 128px */

  /* Layout */
  --content-width: 720px;
  --wide-width: 1080px;
  --max-width: 1240px;
  --header-height: 72px;

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

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.1);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 0 0 1px rgba(0,0,0,0.04);
  --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.1), 0 0 0 1px rgba(0,0,0,0.06);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
}