/* ============================================================
   TIBOX · Spacing, Radii, Shadows, Motion
   8px base grid. Soft modern radii. Restrained shadows with a
   subtle cyan glow reserved for interactive emphasis.
   ============================================================ */
:root {
  /* ---- Spacing (8px base) --------------------------------- */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4  */
  --space-2: 0.5rem;    /* 8  */
  --space-3: 0.75rem;   /* 12 */
  --space-4: 1rem;      /* 16 */
  --space-5: 1.5rem;    /* 24 */
  --space-6: 2rem;      /* 32 */
  --space-7: 3rem;      /* 48 */
  --space-8: 4rem;      /* 64 */
  --space-9: 6rem;      /* 96 */
  --space-10: 8rem;     /* 128 */

  /* section rhythm */
  --section-y: clamp(4rem, 8vw, 8rem); /* @kind spacing */
  --container-max: 1200px;
  --container-pad: clamp(1.25rem, 4vw, 3rem);

  /* ---- Radii ---------------------------------------------- */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-pill: 999px;

  /* ---- Borders -------------------------------------------- */
  --border-width: 1px;
  --border-width-thick: 2px;

  /* ---- Shadows -------------------------------------------- */
  --shadow-xs: 0 1px 2px rgba(2, 18, 51, 0.06);
  --shadow-sm: 0 2px 8px rgba(2, 18, 51, 0.07);
  --shadow-md: 0 8px 24px rgba(2, 18, 51, 0.10);
  --shadow-lg: 0 18px 48px rgba(2, 18, 51, 0.14);
  --shadow-xl: 0 30px 70px rgba(2, 18, 51, 0.20);
  /* on-dark elevation */
  --shadow-dark: 0 20px 50px rgba(0, 0, 0, 0.45);
  /* interactive cyan glow */
  --glow-cyan: 0 8px 28px rgba(0, 200, 250, 0.35);
  --glow-cyan-soft: 0 4px 18px rgba(0, 200, 250, 0.22);

  /* ---- Motion --------------------------------------------- */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);        /* @kind other */
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);    /* @kind other */
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1); /* @kind other */
  --dur-fast: 120ms;  /* @kind other */
  --dur-base: 220ms;  /* @kind other */
  --dur-slow: 420ms;  /* @kind other */

  /* ---- Layering ------------------------------------------- */
  --z-base: 0;        /* @kind other */
  --z-raised: 10;     /* @kind other */
  --z-sticky: 100;    /* @kind other */
  --z-overlay: 1000;  /* @kind other */
  --z-modal: 1100;    /* @kind other */
  --z-toast: 1200;    /* @kind other */

  /* ---- Effects -------------------------------------------- */
  --blur-glass: 14px; /* @kind other */
  --glass-light: rgba(255, 255, 255, 0.08); /* @kind other */
  --glass-border: rgba(255, 255, 255, 0.16); /* @kind other */
}