/* ============================================================
   SPACING, RADII, SHADOW, LAYOUT
   Generous, quiet rhythm. Soft radii. Diffuse low shadows —
   objects rest on paper rather than float above it.
   ============================================================ */

:root {
  /* --- Spacing scale (4px 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 */

  /* --- Radii — soft, never pill except chips -------------- */
  --radius-xs:  3px;
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-pill: 999px;

  /* --- Borders -------------------------------------------- */
  --border-thin: 1px solid var(--border-hairline);
  --border-ink:  1px solid var(--ink);
  --rule-thin:   1px solid var(--border-hairline);

  /* --- Shadows — low, warm, diffuse ----------------------- */
  --shadow-xs:  0 1px 2px rgba(37, 35, 33, 0.05);
  --shadow-sm:  0 2px 8px rgba(37, 35, 33, 0.06);
  --shadow-md:  0 6px 20px rgba(37, 35, 33, 0.08);
  --shadow-lg:  0 16px 44px rgba(37, 35, 33, 0.11);
  --shadow-inset: inset 0 1px 2px rgba(37, 35, 33, 0.06);

  /* --- Layout --------------------------------------------- */
  --content-max:   1180px;
  --measure:       66ch;     /* ideal reading width */
  --gutter:        var(--space-5);

  /* --- Motion — slow, settling, no bounce ----------------- */
  --ease-quiet:   cubic-bezier(0.22, 0.61, 0.36, 1);  /* @kind other */
  --ease-settle:  cubic-bezier(0.33, 0, 0.2, 1);      /* @kind other */
  --dur-fast:     140ms;  /* @kind other */
  --dur-base:     240ms;  /* @kind other */
  --dur-slow:     420ms;  /* @kind other */
}