:root{
  --t-silk:10px;   /* printed legend */
  --t-micro:11px;  /* control caption, meta */
  --t-ui:13px;     /* interface default */
  --t-body:15px;   /* prose */
  /* 16-23 deliberately empty — the gap is the design */
  --t-read-s:24px; /* inline readout, meter value */
  --t-read:34px;   /* primary readout, timecode */
  --t-plate:52px;  /* unit designation, once per screen */

  --track-silk:.14em;
  --track-tight:-.012em;
  --track-read:-.02em;

  --lh-chassis:1.2; /* @kind other */
  --lh-prose:1.5; /* @kind other */
  --lh-legend:1; /* @kind other */

  /* drawing weights */
  --w-hair:.5px;
  --w-dim:1px;
  --w-object:1.5px;
}