/* ============================================================
   Frame & Field — Elevation & motion tokens
   The system is effectively flat. One soft plate shadow only.
   ============================================================ */
:root {
  /* --- Elevation --- */
  --shadow-flat: none;
  /* Broad, soft — the plate rests on paper, it does not float */
  --shadow-plate: 0 24px 60px -32px rgba(17, 17, 17, 0.35);

  /* --- Focus ring: double ring (paper inner, ink outer) --- */
  --focus-ring: 0 0 0 2px var(--color-paper), 0 0 0 4px var(--color-ink);

  /* --- Motion — color transitions only, never z-depth --- */
  --motion-fast: 120ms ease; /* @kind other */
  --motion-base: 200ms ease; /* @kind other */
}