/* ============================================================
   Uncharted Leadership — Spacing, Radii, Shadow, Motion
   ============================================================ */

:root {
  /* ---- Spacing (4px base grid) ---- */
  --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:  2.5rem;   /* 40 */
  --space-8:  3rem;     /* 48 */
  --space-9:  4rem;     /* 64 */
  --space-10: 5rem;     /* 80 */
  --space-11: 6.5rem;   /* 104 */
  --space-12: 8rem;     /* 128 */

  /* ---- Radii — soft, generous (cover keyline frame is rounded) ---- */
  --radius-xs:  4px;
  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  18px;   /* cards */
  --radius-xl:  28px;   /* the signature cover keyline radius */
  --radius-2xl: 40px;
  --radius-pill: 999px;

  /* ---- Border widths ---- */
  --border-hair: 1px; /* @kind spacing */
  --border-thin: 1.5px; /* @kind spacing */
  --border-med:  2px; /* @kind spacing */

  /* ---- Elevation — warm, low-spread shadows ---- */
  --shadow-xs: 0 1px 2px rgba(26, 28, 66, 0.06);
  --shadow-sm: 0 2px 8px rgba(26, 28, 66, 0.08);
  --shadow-md: 0 8px 24px rgba(26, 28, 66, 0.10);
  --shadow-lg: 0 18px 48px rgba(26, 28, 66, 0.14);
  --shadow-book: 0 26px 60px -12px rgba(18, 20, 46, 0.45); /* book mockups */
  --shadow-focus: 0 0 0 3px rgba(255, 141, 54, 0.45);

  /* ---- Layout ---- */
  --container-sm: 640px;
  --container-md: 880px;
  --container-lg: 1120px;
  --container-xl: 1320px;

  /* ---- Motion — calm, confident, no bounce ---- */
  --ease-out:   cubic-bezier(0.22, 0.61, 0.36, 1); /* @kind other */
  --ease-inout: cubic-bezier(0.65, 0, 0.35, 1); /* @kind other */
  --dur-fast:   140ms; /* @kind other */
  --dur-base:   220ms; /* @kind other */
  --dur-slow:   420ms; /* @kind other */
}