:root{
  /* Radii are effectively absent. 2px exists only for ink-ground chips and badges. */
  --radius-none:0;
  --radius-chip:2px;
  --hairline:1px;
  --hairline-brass:1px;
  --rule-brass-width-mark:320px;
  --rule-brass-width-header:16px;
  --border-hair:1px solid var(--rule);
  --border-struct:1px solid var(--ink);
  --border-dotted:1px dotted var(--rule);
  /* One shadow exists in the whole system, for the fixed ink badge. Cards never carry shadow. */
  --shadow-badge:0 6px 24px rgba(0,0,0,.14);
}