/* ============================================
   Brand Sprint Labs — Design Tokens
   Spacing, radius, shadows, transitions, sizing
   ============================================ */

:root {
  /* --- Spacing Scale --- */
  --space-0: 0;
  --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 */

  /* --- Border Radius --- */
  --radius-none: 0;
  --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;

  /* --- Shadows --- */
  --shadow-sm: 0 1px 2px 0 rgba(20, 18, 24, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(20, 18, 24, 0.07), 0 2px 4px -2px rgba(20, 18, 24, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(20, 18, 24, 0.08), 0 4px 6px -4px rgba(20, 18, 24, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(20, 18, 24, 0.10), 0 8px 10px -6px rgba(20, 18, 24, 0.05);

  /* --- Transitions --- */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
  --duration-slower: 600ms;
  --easing-default: cubic-bezier(0.4, 0, 0.2, 1);
  --easing-in: cubic-bezier(0.4, 0, 1, 1);
  --easing-out: cubic-bezier(0, 0, 0.2, 1);
  --easing-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* --- Typography Sizes --- */
  --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 */
  --text-6xl: 3.75rem;    /* 60px */
  --text-7xl: 4.5rem;     /* 72px */

  /* --- Line Heights --- */
  --leading-none: 1;
  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;

  /* --- Font Weights --- */
  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* --- Z-Index Scale --- */
  --z-base: 0;
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-overlay: 30;
  --z-modal: 40;
  --z-toast: 50;

  /* --- Container Widths --- */
  --width-narrow: 640px;
  --width-standard: 840px;
  --width-wide: 1100px;
  --width-max: 1400px;
}